Transcript
Page 1: ICOM IC R20 Service Manual

COMMUNICATIONS RECEIVER

iC-r20

SERVICEMANUAL

Page 2: ICOM IC R20 Service Manual

INTRODUCTION

DANGER

This service manual describes the latest service informationfor the IC-R20 COMMUNICATIONS RECEIVER at the timeof publication.This service manual covers each versions.

MODEL

IC-R20

VERSION

[USA], [EXP-01],

[CAN]

[EUR], [EXP-02]

[UK], [SEA]

AC adapter

BC-149A

BC-149D

ORDERING PARTS

Be sure to include the following four points when orderingreplacement parts:

1. 10-digit order numbers2. Component part number and name3. Equipment model name and unit name4. Quantity required

<SAMPLE ORDER>

1110003200 S.IC TA31136FN IC-R20 RF UNIT 5 pieces8930062430 Key 2699 Keyboard IC-R20 Chassis 12 pieces

Addresses are provided on the inside back cover for yourconvenience.

NEVER connect the receiver to an AC outlet or to an exter-nal DC power supply that uses more than 6.3 V. This will ruinthe receiver.

DO NOT expose the receiver to rain, snow or any liquids.

DO NOT reverse the polarities of the power supply whenconnecting the receiver.

DO NOT apply an RF signal of more than 20 dBm (100 mW)to the antenna connector. This could damage the receiver’sfront end.

REPAIR NOTES

1. Make sure a problem is internal before disassembling the receiver.2. DO NOT open the receiver until the receiver is disconnected from its power source.3. DO NOT force any of the variable components. Turn them slowly and smoothly.4. DO NOT short any circuits or electronic parts. An insulated turning tool MUST be used for all adjustments.5. DO NOT keep power ON for a long time when the receiver is defective.6. READ the instructions of test equipment thoroughly before connecting equipment to the receiver.

To upgrade quality, any electrical or mechanical parts andinternal circuits are subject to change without notice orobligation.

Icom, Icom Inc. and are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom,Germany, France, Spain, Russia and/or other countries.

Page 3: ICOM IC R20 Service Manual

SECTION 1 SPECIFICATIONS

SECTION 2 INSIDE VIEWS

SECTION 3 DISASSEMBLY INSTRUCTIONS

SECTION 4 CIRCUIT DESCRIPTION4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 14-2 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 74-3 OTHER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 104-4 POWER SUPPLY CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 114-5 PORT ALLOCATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 124-6 BC-156 CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 14

SECTION 5 ADJUSTMENT PROCEDURES5-1 PREPARATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 15-2 SOFTWARE ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 3

SECTION 6 PARTS LIST

SECTION 7 MECHANICAL PARTS AND DISASSEMBLY

SECTION 8 SEMI-CONDUCTOR INFORMATION

SECTION 9 BOARD LAYOUTS9-1 RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 19-2 LOGIC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 39-3 REC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 59-4 1STAVCO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 79-5 1STBVCO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 7 9-6 2NDCVCO BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 79-7 2NDDVCO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 79-8 DOWNCONV BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 7

SECTION 10 BLOCK DIAGRAM

SECTION 11 VOLTAGE DIAGRAM11-1 RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 111-2 LOGIC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 311-3 REC UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 411-4 1STAVCO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 511-5 1STBVCO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 511-6 2NDCVCO BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 611-7 2NDDVCO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 611-8 DOWNCONV BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 7

SECTION 12 BC-156 BATTERY CHARGER UNIT12-1 DISASSEMBLY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 112-2 BC-156 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 112-3 BC-156 VOLTAGE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 212-4 BC-156 BOARD LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 3

TABLE OF CONTENTS

Page 4: ICOM IC R20 Service Manual

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SECTION 1 SPECIFICATIONS

• IC-R20M GENERAL• Frequency coverage :

• Mode : FM, WFM, AM, SSB, CW• No. of memory channel : 1250 channel

(incl. scan edge and automemory write ch.)

• Frequency stability : ±6 ppm max. • Tuning steps : 0.01, 0.1, 1, 5, 6.25, 8.33*,

9*, 10, 12.5, 15, 20, 25,30, 50 and 100 kHz*selectable depending onthe operating frequencyband.

• Antenna Impedance : 50 Ω• Power supply requirement : 3 × AA(R6) alkaline cells,

BP-206 or external powersupply (BC-149/A/D, CP-18)

• Polarity : Negative ground• Current drain (at 3.7 V, backlight is OFF) :

Rated audio 150 mA typicalStandby 100 mA typicalPower saved 35 mA typical(Power save ratio is 1 : 4)

• Usable temperature range : –10˚C to +60˚C( –14˚F to +140˚F)

• Dimensions : 60(W) × 142(H) × 34.8(D) mm;(projections not included) 23⁄8 (W) × 519⁄32 (H) × 13⁄8(D) in

• Weight (with antenna and BP-206) : Approx. 320 (g); 1119⁄32 (oz)• External SP connector : 3-conductor 3.5(d) mm

(1⁄8”) / 8Ω

• Audio output power (at 3.7 V) : 100 mW typical at 10 %distortion with an 8 Ω load

• BP-206 charging time : Approx. 8 hours

• Charging current : 400 mA typical

M RECEIVER• Receiver system : Triple super heterodyne

and down convertor• Intermediate frequency : 1st 266.7 and 429.1 MHz

2nd 19.65 MHz3rd 450 kHz

• Sensitivity* :Single mode receiving; Except spurious point (Unit; µV)

*FM and WFM is measured at 12 dB SINAD. AM, SSB andCW are measured at 10 dB S/N.

• Squelch Sensitivity : (except spurious points)

• Selectivity : SSB/CW More than 1.8 kHz / –6 dBAM / FM More than 12 kHz / –6 dB

Less than 30 kHz / –60 dBWFM More than 150 kHz / –6 dB

All stated specifications are subject to change without notice or obligation.

Version

[EUR], [UK],[SEA], [CAN]

[EXP-01], [EXP-02]

[USA]

[FRA]

Receive coverage (MHz)

0.150–3304.999

0.150–821.999, 851.000–866.999,896.000–1304.999, 1305.000–3304.999

0.150–29.999, 50.200–51.200,87.500–108.000, 144.000–146.000

430.000–440.000, 1240.000–1300.000

Frequency (MHz)0.495 – 1.6191.620 – 4.9995.000 – 29.99930.000 – 49.99950.000 – 53.99954.000 – 75.99976.000 – 108.000108.001 – 117.999118.000 – 135.999136.000 – 146.999147.000 – 174.999175.000 – 221.999330.000 – 469.999470.000 – 769.999770.000 – 832.999833.00 – 1304.999

1330.000 – 2304.9992330.000 – 2999.999

FM—

0.56

0.4

0.56

0.715.618

WFM

1.8

1.8—2.5

AM

2.2

1.4

1.4

SSB/CW

0.4

0.25—

0.25

0.25

0.32

Frequency (MHz)

0.495 – 1.619

1.620 – 4.999

5.000 – 29.999

30.000 – 75.999

76.000 – 108.000

108.001 – 117.999

118.000 – 135.999

136.000 – 174.999

175.000 – 221.999

330.000 – 469.999

470.000 – 769.999

770.000 – 832.999

833.000 – 1304.999

1330.000 – 2304.999

2333.000 – 2999.999

FM

0.56 µV

0.4 µV

0.56 µV

0.71 µV

5.6 µV

18 µV

WFM

18 µV

18 µV

18 µV

AM

2.2 µV

1.4 µV

1.4 µV

Page 5: ICOM IC R20 Service Manual

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• BC-156• Input voltage : 8.0–16.0 V

• Charging current : 0.96–1.44 A (Rapid charging)

• Usable temperature : 0˚C to +35˚C (+32˚F to +95˚F)

• Timer device : 192–288 minutes (Rapid charging)12–18 minutes (Reserve charging)

• Protect function :

FUNCTION BP-206 CONDITION BC-156 ACTION LED CONDITION

Over discharge Becomes 1.5 V Charging stop Blinking orange

Over charge Becomes 4.5 V Charging stop Blinking orange

Overcurrent Shorten BP-206 and GND Charging stop Blinking orange

Full charge Becomes 4.2 V Charging stop Lighting green

Normal charging Becomes 3.5 V Charging Lighting orange

Page 6: ICOM IC R20 Service Manual

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SECTION 2 INSIDE VIEWS

2-1 RF UNIT • Top view

• Bottom view

Highpass filter circuit(C854, C856, C858)

470—833 MHzRF amplifier(Q24: 2SC5008)

1G RF amplifier(Q26: 2SC5624)

B-BAND RF amplifier(IC18: PC2746TB)

B-BAND 1st mixer(IC15: PC2757TB)

B-BAND 1st IF filter(266.7 MHz)(FI1: EFCH266MKQP1)

B-BAND 2nd mixer(IC16: PC2757TB)

SSB AF amplifier(Q532: 2SK1069)

SSB IF amplifier 450 kHz (Q531: 2SC4617)

BFO mixer(D115, D116: RB876W)

B-BAND 3rd Lo amplifier(Q555: 2SC5006)

B-BAND 2nd IF amplifier(Q542: 2SC5006)

A-BAND IF IC(IC2: TA31136FN)

A-BAND 2nd IF amplifier(Q5: 2SC5006)

A-BAND 3rd Lo amplifier(Q540: 2SC5006)

A-BAND 2nd IF filter(19.65 MHz)(FI3: FL-293)

A-BAND 2nd mixer(IC10: PC2757TB)

A-BAND 1st IF filter(429.1 MHz)(FI4: EFCH429MKQP4)

A-BAND 1st mixer(IC1: PC2757 TB)

A-BAND RF amplifier(IC19: PC2757 TB)

30—300 MHz RF amplifier(Q36: 2SC5006)

A-UHF RF amplifier(Q35: 2SC5006)

B-UHF RF amplifier(Q548: 2SC5006)

Lowpass filter circuit (L123—L125)

A/B-UHF (pre-amplifier (Q551: PA805T)

PLL reference oscillator circuit Oscilktes 19.200 MHz

B-BAND FM IF IC(IC17: TA31136FN)

X1: CR-593, D171: HVC350BQ556: 2SC4617

B-BANDAM detector and AGC amplifier(Q545: XP6501)

A-BAND AM detector and AGC amplifier(Q4: XP6501)

A/B-VHF pre-amplifier(Q550: FH102)

A-VHF A-band RF amplifier(Q14: 2SC5006)

MF/HF-L/HF-HRF amplifier circuit Q505: 2SC4226, D163, D164: MA2S728

B-BAND IF amplifier(Q544: XP6501)

A-BAND IF amplifier(Q1: XP6501)

DOWNCONV BOARD

1STBVCO BOARD

1STAVCO BOARD

Bar antenna

2NDDVCO BOARD

2NDCVCO BOARD

Page 7: ICOM IC R20 Service Manual

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2-2 LOGIC UNIT • Top view • Bottom view

BFO circuit IC6: SN74AHC1GU04DBVR X2: CSBFB543K

AF amplifier regulator(Q7: XP1501 Q9: 2SB1132)

AF amplifier(IC15: TA31056F Q8: 2SA1588)

AF pre-amplifiers(Q12, Q16: 2SC4617)

+3 regulators(Q10, Q15: 2SA1362)

Reset IC(IC2: BD5228G)

Main CPU(IC3: M30620MCP-129GP [OTHER],

M30620MCP-130GP [USA])

B-BAND AF circuit Q24: XP6501, Q27: 2SJ144, Q22: 2SC4617, IC7: SM6451B

A-BAND AF circuit Q25: XP6501, Q26: 2SJ144, Q23: 2SC4617, IC7: SM6451B

+3V reg.(Q17: 2SA1588)

Battery daging regulators(Q30: 2SB1201, Q32: 2SC4617, Q33: 2SB1132)

LCD(DS12: M3-0243TIY)

+3SC reg.(Q13: XP6501)+3S reg.(Q14: 2SA1588)

3V reg. IC(IC8, IC9: R1111N321B)

Recording/playback IC(IC7: ML2302TB)

+3V regulator(IC1: BD5228G, IC10: R1111N321B)

Mute (when SQL off)(IC8, IC9: SN74AHC1G66HDBVR)

USB interface IC(IC3: FT245BM)

Sub CPU(IC2: M30620FCPGP)

Flash memory forrecording/playback(IC6: K9F5608UOC-YCBO)

2-3 REC UNIT • Top view • Bottom view

Page 8: ICOM IC R20 Service Manual

SECTION 3 DISASSEMBLY INSTRUCTIONS

(1) REMOVING THE REAR PANEL

q Unscrew 4 screws, A (2 × 115 mm, black).w Unscrew 2 screws, B (2 × 8 mm, black).e Unplug W1 and J8 (LOGIC unit) to separate the front and

the rear panels.

(3) REMOVING THE REC UNIT

q Unscrew 4 flat-head screws, H (2 × 4 mm, silver).w Unsolder 1 point, I.e Remove the REC unit in the direction of the arrow.

(4) REMOVING THE RF UNIT

q Unscrew 3 flat-head screws, J (2 × 4 mm, silver).w Unsolder 2 points, K.e Remove the RF unit in the direction of the arrow.

Front panel

Rear panel

LOGIC unit Speaker

W1

J8

A

B

H

I

REC unit

RF unit

J

K

KJ1

LOGIC unit

J5

C D

E

F

G

(2) REMOVING THE LOGIC UNIT

q Remove 2 knobs, C, and unscrew 2 nuts, D.w Unscrew 2 flat-head screws, E (2 × 4 mm, silver), and 1

pan-head screw, F (2 × 4 mm, black).e Unsolder 10 points, G.r Unplug J5 (bottom side of LOGIC unit) and J1 (RF unit) to

separate the LOGIC unit.t Remove the LOGIC unit in the direction of the arrow.

3 - 1

Page 9: ICOM IC R20 Service Manual

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4-1 RECEIVER CIRCUITS4-1-1 BAND SWITCHING CIRCUIT (RF UNIT)The RF signals from the antenna connector pass throughthe limiter (D68) and an attenuator* (D69). The signals arethen applied to the antenna switching circuit (D3, D11, D13,D65, D66 and D73–D75 ).*Above 2 GHz RF signals do not pass through the attenua-tor.

4-1-2 RF CIRCUIT (RF UNIT)The RF circuit amplifies the received signals within therange of frequency coverage and filters out-of-band signals.

• A-BAND CIRCUIT(1) MF (above 0.15 MHz, below 1.9 MHz) signalsRF signals (0.15–1.9 MHz) from an attenuator (D69) passthrough the low-pass filter (L123–L125 and C851–C853),band switch (D66) and another low-pass filter (L88, L89,C533–C535, C657, C658). The filtered signals pass throughanother band switch (D67), and are then amplified at an RFamplifier (Q505). The amplified signals are applied to thenext band switch (D72).

(2) HF-L (above 1.9 MHz, below 15 MHz) signalsRF signals (1.9–15 MHz) from an attenuator (D69) passthrough the low-pass filter (L123–L125 and C851–C853),band switch (D65) and bandpass filter (L85–L87, L91,C522–C531 and C891). The filtered signals pass throughanother band switch (D70), and are then amplified at an RFamplifier (Q505). The amplified signals are applied to thenext band switch (D72).

SECTION 4 CIRCUIT DESCRIPTION

RFRF

BPF

BPF

BPF

RF

BPF

BPF

PreAmp

PreAmp

HF-L (1.9 15 MHz)

MF (15 30 MHz)

A-VHF (118 175 MHz)

B-VHF (118 175 MHz)

30 300M (30 300 MHz except A-VHF range)

A-UHF (300 470 MHz)

800M (470 833 MHz)

1G (833 1305 MHz)

B-UHF (300 470 MHz)

MF (0.15 1.9 MHz)

from the bar antenna

HPF

HPF

LPF

LPF

LPF

LIMITER

BANDSW

BANDSW

BANDSW

BANDSW

BANDSW

BANDSW

BANDSW

ANTENNA

ATT

ANTSW

to 2nd mixercircuit

RF-A circuit

RF-B circuit1st mixer

1st mixerto 2nd mixercircuit

LO (1001 or 2002MHz)

RFIC2IC3

mixer

1305 3305 MHz

RFRF

BPF

RF

BPF RF

BPF

RF

RF

RF

BPF

BPF

HPF

Q505

Q36

Q550 Q14

Q549

Q551

Q35

Q548

Q24

Q25IC18

IC15

IC1

IC19

• RF CIRCUITS

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(3) HF-H (above 15 MHz, below 30 MHz) signalsRF signals (15–30 MHz) from an attenuator (D69) passthrough the low-pass filter (L123–L125 and C851–C853),band switch (D73) and bandpass filter (L81–L84 andC511–C520). The filtered signals pass through anotherband switch (D64), and are then amplified at an RF amplifi-er (Q505). The amplified signals are applied to the nextband switch (D72).

(4) A-VHF (above 118 MHz, below 175 MHz) signalsRF signals (118–175 MHz) from an attenuator (D69) passthrough the low-pass filter (L123–L125 and C851–C853),band switch (D74), and are then applied to the pre-amplifier(Q550) which is controlled by “A_VHF3V” signal via theD148. The signals are amplified at the RF amplifier (Q14),and pass through the bandpass filter (D1, D2, L1 andC14–C16). The filtered signals are applied to the next bandswitch (D25).

(5) 30–300M (above 30 MHz, below 300 MHz and exceptA-VHF signals) signals

RF signals (118–175 MHz) from an attenuator (D69) passthrough the low-pass filter (L123–L125 and C851–C853)and band switch (D75). The filtered signals pass through thebandpass filter (L9, L10, L92, L133, C40–C43, C665 andC666), and are then amplified at an RF amplifier (Q36). Theamplified signals are applied to the next band switch (D34).

(6) A-UHF (above 300 MHz, below 470 MHz) signalsRF signals (300–470 MHz) from an attenuator (D69) passthrough the high-pass filter (L126, L127 and C854–C858)and band switch (D3). The filtered signals pass through thelow-pass filter (L3, L4, C22, C23 and C218), and are thenamplified at the pre-amplifier (Q551) which is controlled by“A_UHF3V” signal via the D150. The amplified signals areapplied to the RF amplifier (Q35), and then pass through thebandpass filter (D4, D5, L60, C58 and C59). The signals areapplied to the next band switch (D29).

• B-BAND CIRCUIT(1) B-VHF (above 118 MHz, below 175 MHz) signalsRF signals (118–175 MHz) from an attenuator (D69) passthrough the low-pass filter (L123–L125 and C851–C853),band switch (D74), and are then applied to the pre-amplifier(Q550) which is controlled by “B_VHF3V” signal via theD149. The signals are amplified at the RF amplifier (Q549),and pass through the bandpass filter (D145, D146, L120,C833 and C834). The filtered signals are applied to the nextband switch (D147).

(2) B-UHF (above 330 MHz, below 470 MHz) signalsRF signals (330–470 MHz) from an attenuator (D69) passthrough the high-pass filter (L126, L127 and C854–C858)and band switch (D3). The filtered signals pass through thelow-pass filter (L3, L4, C22 and C23), and are then amplifiedat the pre-amplifier (Q551) which is controlled by“A_VHF3V” signal via the D151. The amplified signals areapplied to the RF amplifier (Q548), and then pass throughthe bandpass filter (D141, D142, L113, C814 and C816).The signals are applied to the next band switch (D143).

(3) 800M (above 470 MHz, below 833 MHz) signalsRF signals (470–833 MHz) from an attenuator (D69) passthrough the high-pass filter (L126, L127 and C854–C858)and band switch (D11). The filtered signals pass through thebandpass filter (D173, D174, L129 and L130), and are thenamplified at the RF amplifier (Q24). The amplified signalspass through the bandpass filter (D175, D176 and L132).The signals are applied to the next band switch (D32).

(4) 1G (above 833 MHz, below 1305 MHz) signalsRF signals (833–1305 MHz) from an attenuator (D69) passthrough the high-pass filter (L126, L127 and C854–C858)and band switch (D13). The filtered signals pass through thebandpass filter (L11–L13, L43, C5, C45–C51), and are thenamplified at the RF amplifier (Q26). The signals are appliedto the next band switch (D36).

4-1-3 DOWN CONVERTER CIRCUIT(RF UNIT AND DOWNCONV BOARD)

The down converter circuit converts the signals within1305–3305 MHz into 0.15 MHz to 1305 MHz signals.The converted frequencies can calculate as follow.F(x)=X–1001 (X is above 1305 MHz, below 2306 MHz)F(x)=X–2002 (X is above 2306 MHz, below 3305 MHz)

NOTE: F(x) is converted frequencyX is receiving frequency

(Calculate example)• Convert into 599 MHz when receiving 1600 MHz.• Convert into 798 MHz when receiving 2800 MHz.

The RF signals from the limiter (D68) are applied to theDOWNCONV board via the J1, pin 8 on the DOWNCONVboard. The signals pass through the band switch (DOWN-CONV board; D1) and high-pass filter (DOWNCONV board;L1, L2, C2–C4, C41 and C42), and are then amplified at theRF amplifier (DOWNCONV board; IC2, pin 1). The signalsare mixed with 1001 MHz or 2002 MHz LO signal at themixer (DOWNCONV board; IC3, pin 1). The converted sig-nals output from pin 6, and pass through the band switch(DOWNCONV board; D2).The converted signals are applied to the RF unit via J1, pin 1 on the board. According to converted frequency, thesignals are applied to the each matched RF circuit.

4-1-4 1ST MIXER AND 1ST IF CIRCUITS (RF UNIT)The 1st mixer circuit converts the received RF signals to afixed frequency of the 1st IF signal with a PLL output fre-quency. By changing the PLL frequency, only the desiredfrequency will pass through the bandpass filters at the nextstage of the 1st mixer.

• A-BAND CIRCUITThe RF signals from the band switch (D25, D29, D34 andD72) are amplified at the RF amplifier (IC19, pins 1, 4), andare mixed with 1st LO signals at the 1st mixer circuit (IC1,pin 1) to produce a 429.1 MHz 1st IF signal. The 1st IF sig-nal is output from pin 6, and passed through the bandpassfilter (FI4) to suppress unwanted harmonic components. Thefiltered 1st IF signal is applied to the 2nd mixer circuit.

The 1st LO signals are generated at the 1st A_VCO circuitand are applied to the 1st mixer (IC1, pin 3) directly.

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• B-BAND CIRCUITThe RF signals from the band switch (D32, D36, D143 andD147) are amplified at the RF amplifier (IC18, pins 1, 4), andare mixed with 1st LO signals at the 1st mixer circuit (IC15,pin 1) to produce a 266.7 MHz 1st IF signal. The 1st IF sig-nal is output from pin 6, and passed through the bandpassfilter (FI1) to suppress unwanted harmonic components. Thefiltered 1st IF signal is applied to the 2nd mixer circuit.

The 1st LO signals are generated at the 1st B_VCO circuitand are applied to the 1st mixer (IC15, pin 3) directly.

4-1-5 2ND MIXER AND 2ND IF CIRCUITS (RF UNIT)The 2nd mixer circuit converts the 1st IF signal to a 2nd IFsignal.

• A-BAND CIRCUITThe filtered 429.1 MHz 1st IF signal from the bandpass filter(FI4) is mixed with the 2nd LO signal at the 2nd mixer circuit(IC10, pin 1, 6) to produce a 19.65 MHz 2nd IF signal.

In case of AM/CW/SSB/Narrow FM mode, the 2nd IF signalpasses through the mode switch (D58), crystal bandpass fil-ter (FI3) and another mode switch (D60).In case of WFM mode, the 2nd IF signal passes through themode switch (D59), low-pass filter (C202, C745, R207 andR536) and another mode switch (D61).

The filtered 2nd IF signal is amplified at the 2nd IF amplifier(Q5), and is then applied to the demodulator circuit.

• B-BAND CIRCUITThe filtered 266.7 MHz 1st IF signal from the bandpass filter(FI1) is mixed with the 2nd LO signal at the 2nd mixer circuit(IC16, pin 1, 6) to produce a 19.65 MHz 2nd IF signal.

In case of AM/CW/SSB/Narrow FM mode, the 2nd IF signalpasses through the mode switch (D130), crystal bandpassfilter (FI7) and another mode switch (D132).In case of WFM mode, the 2nd IF signal passes through themode switch (D131), low-pass filter (C755, C756, R428,R429 and R537) and another mode switch (D133).

The filtered 2nd IF signal is amplified at the 2nd IF amplifier(Q542), and is then applied to the demodulator circuit.

4-1-6 3RD MIXER AND DEMODULATOR CIRCUITS(RF UNIT)

The 3rd mixer circuit converts the 2nd IF signal to a 3rd IFsignal. The demodulator circuit converts the 3rd IF signalinto AF signals.

• A-BAND CIRCUITThe 19.65 MHz 2nd IF signal from the 2nd IF amplifier (Q5)is applied to the 3rd mixer section of the FM IF IC (IC2, pin16) and is then mixed with the 3rd LO signal for conversioninto a 450 kHz 3rd IF signal.

IC2 contains the 3rd mixer, limiter amplifier, quadraturedetector and S-meter detector, etc. A frequency from thePLL reference oscillator is used for the 3rd LO signal (19.20MHz).

(1) FM MODEThe 3rd IF signal is output from the FM IF IC (IC2, pin 3),and passes through the mode switch (D109) and ceramicbandpass filter (FI2). The filtered signal passes through themode switch (D112), and is then fed back and amplified atthe limiter amplifier section (pin 5). The signal is demodulat-ed to AF signals at the quadrature detector section (pins 10,11) and detector coil (L21). The demodulated AF signals areoutput from pin 9 and are applied to the AF switch (IC12, pin11) via the “A_DETFM” line, and are then applied to the AFcircuit (LOGIC unit) as “A_DET” signal.

(2) WFM MODEThe 3rd IF signal is output from the FM IF IC (IC2, pin 3),and passes through the mode switch (D108) and low-passfilter (L99, C686 and C687). The filtered signal passesthrough the mode switch (D111), and is then fed back to thelimiter amplifier section (pin 5). The amplified signal isdemodulated at the quadrature detector section (pins 10 and11) and detector coil (L21). The AF signals are output frompin 9 and are applied to the AF switch (IC12, pin 11) via the“A_DETFM” line, and are then applied to the AF circuit(LOGIC unit) as “A_DET” signal.

By connecting R55 to R54 in parallel, the output character-istics of pin 12, “RSSI”, change gradually. Therefore, the FMIF IC can detect WFM components.

1st LO signal fromthe 1STAVCO board

RF signals fromthe A-BAND circuit

1st mixerIC1

2nd mixerIC10

2nd LO signal fromthe 2NDCVCO board

2nd IF signal

A-BAND circuitFI3

Q5

Q542

FI7

BPF

1st LO signal fromthe 1STBVCO board

RF signals fromthe B-BAND circuit

1st mixerIC15

2nd mixerIC16

2nd LO signal fromthe 2NDDVCO board

BPF

B-BAND circuit

XtalBPF

LPF

BANDSW

BANDSW

RF

2nd IF signalXtalBPF

LPF

BANDSW

BANDSW

RF

• 1ST, 2ND MIXER AND 2ND IF CIRCUITS

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4 - 4

(3) AM MODEThe 3rd IF signal is output from the FM IF IC (IC2, pin 3),and passes through the mode switch (D109) and ceramicbandpass filter (FI2). The filtered signal passes through themode switch (D112), and is then applied to the IF amplifier(Q531). The amplified signal is demodulated at the AMdetector (Q4). The AF signals pass through the ANL circuit(D114), and are then applied to the AF switch (IC12, pin 4)via the “A_DETAM” line, and are then applied to the AF cir-cuit (LOGIC unit) as “A_DET” signal.

(4) SSB/CW MODESThe 3rd IF signal is output from the FM IF IC (IC2, pin 3),and passes through the mode switch (D110) and ceramicbandpass filter (FI6). The filtered signal passes through themode switch (D113), and is then applied to the IF amplifier(Q531). The amplified signal is mixed with BFO signal fromthe LOGIC unit at the mixer (D115 and D116) to demodulateto AF signals. The AF signals are applied to the SSB AFamplifier (Q532), and are then applied to the AF switch(IC12, pin 1) via the “A_DETSSB” line, and are then appliedto the AF circuit (LOGIC unit) as “A_DET” signal.

• B-BAND CIRCUITThe 19.65 MHz 2nd IF signal from the 2nd IF amplifier(Q542) is applied to the 3rd mixer section of the FM IF IC(IC17, pin 16) and is then mixed with the 3rd LO signal forconversion into a 450 kHz 3rd IF signal.

IC17 contains the 3rd mixer, limiter amplifier, quadraturedetector and S-meter detector, etc. A frequency from thePLL reference oscillator is used for the 3rd LO signal (19.20MHz).

(1) FM MODEThe 3rd IF signal is output from the FM IF IC (IC17, pin 3),and passes through the mode switch (D134) and ceramicbandpass filter (FI8). The filtered signal passes through themode switch (D136), and is then fed back and amplified atthe limiter amplifier section (pin 5). The signal is demodulat-ed AF signals at the quadrature detector section (pins 10,11) and detector coil (L105). The demodulated AF signalsare output from pin 9 and are applied to the AF switch (IC21,pin 1) via the “DET_OUT” line, and are then applied to theAF circuit (LOGIC unit) as “B_DET” signal.

(2) WFM MODEThe 3rd IF signal is output from the FM IF IC (IC17, pin 3),and passes through the mode switch (D135) and low-passfilter (L106, C781 and C782). The filtered signal passesthrough the mode switch (D137), and is then fed back to thelimiter amplifier section (pin 5). The amplified signal isdemodulated at the quadrature detector section (pins 10 and11) and detector coil (L105). The AF signals are output frompin 9 and are applied to the AF switch (IC21, pin 1) via the“DET_OUT” line, and are then applied to the AF circuit(LOGIC unit) as “B_DET” signal.

By connecting R436 to R437 in parallel, the output charac-teristics of pin 12, “RSSI”, change gradually. Therefore, theFM IF IC can detect WFM components.

16

Limiteramp.

X119.2 MHz

Q540

Q556 D171

RSSI IC2 TA31136F13

2nd IF (19.65 MHz)from Q5

"A_RSSI" signal to the CPU (LOGIC unit; IC3, pin 91)

11109

8 7 5 3 2

Activefilter

Noisedetector

FMdetector Noise

comp.

"A_NOISE" signal to the CPU(LOGIC unit; IC3, pin 5)

12

R54

R55

C101

C94

R56C95

C98 C99

AMDET IF

C96

R61

R59R60

"A_WFMC"

L21

C93

C242

"A_DETFM" signalto the AF switch

"A_AGC" signal to RF amplifiers

"A_DETSSB" signalto the AF switch

"BFO" signal fromthe LOGIC unit

Mixer3rd

Q41

DET NB

AGC

AGC

MUTESW

REFCONT.

REFOSC

LO

SSB/CW

FI6

LPF

AM/NFM

WFM

Q521,Q525

Q523

Q524,Q526,Q528 Q522

Q1

AF

Q532 D115D116

IF

Q531

Q530

Q4Q4

FI2

• A-BAND 3RD MIXER AND DEMODULATOR CIRCUITS

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(3) AM MODEThe 3rd IF signal is output from the FM IF IC (IC17, pin 3),and passes through the mode switch (D134) and ceramicbandpass filter (FI8). The filtered signal passes through themode switch (D136), and is then applied to the IF amplifier(Q544). The amplified signal is demodulated at the AMdetector (Q545). The AF signals pass through the ANL cir-cuit (D139), and are then applied to the AF switch (IC21, pin4) via the “AM_DET” line, and are then applied to the AF cir-cuit (LOGIC unit) as “B_DET” signal.

4-1-7 AF AMPLIFIER CIRCUIT (LOGIC UNIT)The AF amplifier circuit amplifies the demodulated AF sig-nals to drive a speaker.

• A-BAND CIRCUITWhile in FM mode, AF signals from the demodulator circuit(RF unit) pass through the AF filter (Q25), and are thenamplified at the AF amplifier (Q23).

While in WFM/AM/SSB/CW modes, AF signals from thedemodulator circuit (RF unit) bypass the AF filter via the AFfilter bypass switch (Q26), and are then amplified at the AFamplifier (Q23).

The signals are applied to the electronics volume (IC7, pin6) to control volume level. The signals output from pin 5, andare applied to the pre-amplifier (Q12). The signals are ampli-fied at the AF amplifier (IC5, pin 1), and then output from pin6. The signals are applied to the internal speaker which isconnected with J8 via the external speaker jack (J3).

• B-BAND CIRCUITWhile in FM mode, AF signals from the demodulator circuit(RF unit) pass through the AF filter (Q24), and are thenamplified at the AF amplifier (Q22).

While in WFM/AM modes, AF signals from the demodulatorcircuit (RF unit) bypass the AF filter via the AF filter bypassswitch (Q27), and are then amplified at the AF amplifier(Q22).

The signals are applied to the electronics volume (IC7, pin11) to control volume level after passing through the muteswitch (Q19). The signals output from pin 12, and areapplied to the pre-amplifier (Q16). The signals are amplifiedat the AF amplifier (IC5, pin 1), and then output from pin 6.The signals are applied to the internal speaker which is con-nected with J8 via the external speaker jack (J3).

The electronic volume control circuit controls AF gain, there-fore, the AF output level is according to the [VOL] settingand also the squelch conditions.

4-1-8 SQUELCH CIRCUIT (LOGIC AND RF UNITS)• NOISE SQUELCHThe noise squelch circuit cuts out AF signals when no RFsignals are received. By detecting noise components in theAF signals, the squelch circuit switches the AF mute switch.

A portion of the “A_NOISE” signals from the FM IF IC (RFunit; IC2, pin 13) are applied to the CPU (LOGIC unit; IC3,pin 5). The CPU analyzes the noise condition and outputsthe “AFON” signal (from pin 17) to the AF amplifier’s con-troller (LOGIC unit; Q7).

• TONE SQUELCHThe tone squelch circuit detects AF signals and opens thesquelch only when receiving a signal containing a matchingsubaudible tone (CTCSS). When tone squelch is in use, anda signal with a mismatched or no subaudible tone isreceived, the tone squelch circuit mutes the AF signals evenwhen noise squelch is open.

16

Limiteramp.

X119.2 MHz

Q555

Q556 D171

RSSI IC2 TA31136F13

2nd IF (19.65 MHz)from Q5

"B_RSSI" signal to the CPU (LOGIC unit; IC3, pin 87)

11109

8 7 5 3 2

Activefilter

Noisedetector

FMdetector Noise

comp.

"B_NOISE" signal to the CPU(LOGIC unit; IC3, pin 4)

12

R437

R436

C765

C764

R443C772

C768 C769

AMDET IF

C770

R440

R439 R438

"B_WFMC"

L105

C880

C767

"DET_OUT" signalto the AF switch

"B_AGC" signal to RF amplifiers

"AM_DET" signalto the AF switch

Mixer3rd

Q543

AGC

REFCONT.

REFOSC

LOLPF

AM/NFM

WFM

FI8Q544Q545Q545

ANL

D139

• B-BAND 3RD MIXER AND DEMODULATOR CIRCUITS

Page 14: ICOM IC R20 Service Manual

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(1) A-BAND CIRCUITA portion of the AF signals from the FM IF IC (RF unit; IC2,pin 9) passes through the low-pass filter (LOGIC unit; C161,C164, R169 and R175) via the “A_DET” line to remove AF(voice) signals and is applied to the CTCSS decoder insidethe CPU (LOGIC unit; IC3, pin 89) via the “A_CTONE” lineto control the AF mute switch.

(2) B-BAND CIRCUITA portion of the AF signals from the FM IF IC (RF unit; IC17,pin 9) passes through the low-pass filter (LOGIC unit; C160,C163, R168 and R174) via the “B_DET” line to remove AF(voice) signals and is applied to the CTCSS decoder insidethe CPU (LOGIC unit; IC3, pin 90) via the “B_CTONE” lineto control the AF mute switch.

4-1-9 AGC CIRCUIT (RF UNIT)The AGC (Automatic Gain Control) circuit reduces IF andRF amplifiers gain to keep the audio output at a constantlevel. The receiver gain is determined by the voltage on theAGC line (A-BAND circuit is Q4’s collector, B-BAND circuitis Q545’s collector).

• A-BAND CIRCUITA part of the 3rd IF signal from the mode switch(D111–D113) is amplified at the IF amplifier (Q1), and is thenapplied to the AM detector. (Q4, pin 5). The signal is outputfrom pin 1, and is then applied to the AGC circuit of the sameone (pin 3). The signal is output from pin 4 as “A-AGC” sig-nal, and is then applied to the 3rd IF amplifier (Q1), 2nd IFamplifier (Q5) and RF amplifiers (Q14, Q35, Q36 andQ505).

• B-BAND CIRCUITA part of the 3rd IF signal from the mode switch (D136 andD137) is amplified at the IF amplifier (Q544), and is thenapplied to the AM detector. (Q545, pin 5). The signal is out-put from pin 1, and is then applied to the AGC circuit of thesame one (pin 3). The signal is output from pin 4 as “B-AGC”signal, and is then applied to the 3rd IF amplifier (Q544), 2ndIF amplifier (Q542) and RF amplifiers (Q24, Q25, Q548 andQ549).

The A-AGC or B-AGC voltage is used for the the bias volt-age of the IF and RF amplifiers. When receiving strong sig-nals, the detected voltage increases and the AGC voltagedecreases. Therefore, the receiver obtain stable receivergain.

4-1-10 IC RECORDER CIRCUIT (LOGIC UNIT)The IC RECORDER circuit is composed of RECORDER IC(IC7), sub CPU (IC2), flash memory (IC6), USB interface(IC3), etc.

(1) IN CASE OF RECORDING• A-BAND CIRCUITThe AF signals from the AF amplifier (Q23) are applied tothe REC board via the HJ8, pin 2 as “A_AIN” signal. The sig-nals are applied to the RECORDING IC (IC7, pin 25) to com-press the voice signals, and are then converted to digital sig-nals. The signals are applied to the sub CPU (IC2), and arethen stored in the flash memory (IC6).

• B-BAND CIRCUITThe AF signals from the AF amplifier (Q22) are applied tothe REC board via the HJ8, pin 3 as “B_AIN” signal. The sig-nals pass through the AF mute switch (IC8, pins 1 and 2),and are then applied to the RECORDING IC (IC7, pin 20) tocompress the voice signals, and are then converted to digi-tal signals. The signals are applied to the sub CPU (IC2),and are then stored in the flash memory (IC6).

(2) IN CASE OF PLAYBACKThe stored RECORDING data in the flash memory (IC6) areapplied to the sub CPU (IC2), and are then applied to theRECORDING IC (IC7). The signals are converted to analogsignals, and are then expanded into the AF voice signals.The AF signals output from RECORDING IC (IC7, pin 25).The signals are applied to the LOGIC unit via the J6, pin 3as “AOUT” signal, and are then applied to the electronicsvolume (IC7, pin 11) to control volume level. The signals out-put from pin 12, and are applied to the pre-amplifier (Q16).The signals are amplified at the AF amplifier (IC5, pin 1), andthen output from pin 6. The signals are applied to the inter-nal speaker which is connected with J8 via the externalspeaker jack (J3).

AF FilterAmplifier

AF FilterAmplifierSW

VR

EXT. SP.J3

Rec. ICIC7

MemoryIC6

USB InterfaceIC3

Sub CPUIC2

INT. SP.J8

A_DET

B_DET

Q23, Q25, Q26

Q22, Q24, Q27

Recoding line

Playing lineQ19

IC7

Pre. amp.

Q12

Pre. amp.

Q16

AF amp.

REC UNIT

IC5

• AF AMPLIFIER AND IC RECORDER CIRCUITS

Page 15: ICOM IC R20 Service Manual

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4-2 PLL CIRCUITS4-2-1 PLL CIRCUITA PLL circuit provides stable oscillation of the 1st LO fre-quencies. The PLL circuit compares the phase of the divid-ed VCO frequency to the reference frequency. The PLL out-put frequency is controlled by the divided ratio (N-data) of aprogrammable divider.

• A-BAND CIRCUIT (1STAVCO BOARD)An oscillated signal from one of the 1st VCO circuits(Q1–Q3, D1–D4) passes through the LO switch (D7–D19)and buffer amplifiers (IC2, Q8). The amplified signal isapplied to the PLL IC (IC3, pin 11) and is prescaled in thePLL IC based on the divided ratio (N-data). The PLL ICdetects the out-of-step phase using the reference frequencyand outputs it from pin 5. The output signal is passedthrough the loop filter (Q6, Q7), and is then applied to theone of the 1st VCO circuits as the lock voltage.

• B-BAND CIRCUIT (1STBVCO BOARD)An oscillated signal from one of the 1st VCO circuits(Q1–Q5, D1–D5) passes through the LO switch (D7–D10)and buffer amplifiers (IC2, Q8). The amplified signal isapplied to the PLL IC (IC3, pin 11) and is prescaled in thePLL IC based on the divided ratio (N-data). The PLL ICdetects the out-of-step phase using the reference frequencyand outputs it from pin 5. The output signal is passedthrough the loop filter (Q6, Q7), and is then applied to theone of the 1st VCO circuits as the lock voltage.

• DOWN CONVERTER PLL CIRCUIT(DOWNCONV BOARD)

An oscillated signal from the VCO circuit (Q1, D3) is ampli-fied at the buffer amplifier (Q2). The amplified signal isapplied to the PLL IC (IC4, pin 8) and is prescaled in the PLLIC based on the divided ratio (N-data). The PLL IC detectsthe out-of-step phase using the reference frequency andoutputs it from pin 5. The output signal is passed through thelow-pass filter (L6, C21, C22 and C40), and is then appliedto the one of the 1st VCO circuits as the lock voltage.

4-2-2 REFERENCE OSCILLATOR CIRCUIT(RF UNIT)

The reference oscillator circuit (X1, Q556, D171) generatesa 19.2 MHz reference frequency which is stabilized withinthe temperature range –10˚C (+14˚F) to +60˚C (+140˚F).The reference frequency is applied to the PLL ICs (refer tothe list below in details) and the FM IF ICs (IC2, pin 2 for A-BAND circuit: IC17, pin 2 for B-BAND circuit) via the LOamplifiers (Q540 for A-BAND circuit; Q555 for B-BAND cir-cuit).

4-2-3 1ST VCO CIRCUITS(1STAVCO AND 1STBVCO BOARDS)

• A-BAND CIRCUIT (1STAVCO BOARD)The oscillated signal at 1st A-VCO circuits is applied to thebuffer amplifiers (IC2) via one of the LO switches (D7–D9).The amplified signal is applied to the 1st mixer circuit (RFunit; IC1, pin 3) via the LO amplifier (Q9).

The 1st A-VCO circuit is composed of 1AVCO, 2AVCO and3AVCO. Components and osillating frequences of each cir-cuits are as follow list.

Shift register

PrescalerPhasedetector

Loopfilter

REF.OSC.

REF.CONT.

Programmablecounter

Programmabledivider

X119.2 MHz

to the FM IF ICRF UNIT

1AVCO

Buffer

Buffer

Buffer

LOswitch

Q9

Q8

IC2

161718

PLLBSTB

IC3 (PLL IC)

PLLDATAPLLCK

to the 1st mixer circuit

19

5 11

Q1, D1, D2 D7

D8

D9

2AVCO

Q2, D3

3AVCO

Q3, D4

Q6, Q7

• A-BAND PLL CIRCUIT

BOARD NAME PLL IC INPUT OUTPUT

1STAVCO IC3 pin 19 pin 5

1STBVCO IC3 pin 19 pin 5

2NDCVCO IC1 pin 1 pin 6

2NDDVCO IC1 pin 1 pin 6

DOWNCONV IC4 pin 1 pin 5

1st A-VCO Components Oscillating freq. (MHz)

1AVCO Q1, D1 and D2 849.1–899.0999

2AVCO Q2 and D3 604.1–849.0999

3AVCO Q3 and D4 429.25–604.0999

Page 16: ICOM IC R20 Service Manual

4 - 8

A portion of the signal from the buffer amplifier (IC2) isamplified at the buffer amplifier (Q8) and is then fed back tothe PLL IC (IC3, pin 11) as the comparison signal.

• B-BAND CIRCUIT (1STBVCO BOARD)The oscillated signal at 1st B-VCO circuits is applied to thebuffer amplifiers (IC2) via one of the LO switches (D7–D10).The amplified signal is applied to the 1st mixer circuit (RFunit; IC15, pin 3) via the LO amplifier (Q9). Components andosillating frequences of each circuits are as follow list.

A portion of the signal from the buffer amplifier (IC2) isamplified at the buffer amplifier (Q8) and is then fed back tothe PLL IC (IC3, pin 11) as the comparison signal.

4-2-4 2ND VCO CIRCUITS(2NDCVCO AND 2NDDVCO BOARDS)

The 2nd VCO circuit generates the 2nd LO frequencies, andthe signals are applied to the 2nd mixer circuit.

• A-BAND CIRCUIT (2NDCVCO BOARD)The 2nd C-VCO circuit (Q1 and D1) generates 409.4500MHz and 448.7500 MHz. The oscillated signal is applied tothe 2nd mixer (RF unit; IC10, pin 3), and is then mixed withthe 1st IF signal.

A part of oscillated signal from the 2nd C-VCO circuit isapplied to the PLL IC (IC1, pin 8) as the comparison signal,and is then output from pin 5. The signal passes through theloop filter (R14, R15 and R22), and is then applied to the 2ndC-VCO circuit again as PLL lock voltage.

Shift register

PrescalerPhasedetector

Loopfilter

REF.OSC.

REF.CONT.

Programmablecounter

Programmabledivider

X119.2 MHz

to the FM IF ICRF UNIT

1BVCO

Buffer

Buffer

Buffer

LOswitch

Q9

Q8

IC2

161718

PLLBSTB

IC3 (PLL IC)

PLLDATAPLLCK

to the 1st mixer circuit

19

5 11

Q1, D1, D2 D7

D8

D9

D10

2BVCO

Q2, D3

3BVCO

Q3, D4

4BVCO

Q4, Q5, D5Q6, Q7

• B-BAND PLL CIRCUIT

Q1, D1

VCO2NDVCO

Loopfilter

Q4A_R3V

OSC(19.2 MHz)

Ripplefilter

to the 2nd mixer (IC10, pin 3)

58

1

PLL ICIC1

Buffer

Q3

• 2ND C VCO CIRCUIT

1st B-VCO Components Oscillating freq. (MHz)

1BVCO Q1, D1 and D2 863.3–1099.6999

2BVCO Q2 and D3 683.3–866.6999

3BVCO Q3 and D4 566.3–686.6999

4BVCO Q4, Q5 and D5 384.7–441.6999

Page 17: ICOM IC R20 Service Manual

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• B-BAND CIRCUIT (2NDDVCO BOARD)The 2nd D-VCO circuit (Q1 and D1) generates 247.0500MHz and 286.3500 MHz. The oscillated signal is applied tothe 2nd mixer (RF unit; IC16, pin 3), and is then mixed withthe 1st IF signal.

A part of oscillated signal from the 2nd C-VCO circuit isapplied to the PLL IC (IC1, pin 8) as the comparison signal,and is then output from pin 5. The signal passes through theloop filter (R14, R15 and R22), and is then applied to the 2ndD-VCO circuit again as PLL lock voltage.

4-2-5 3RD LO CIRCUIT (RF UNIT)The 3rd LO circuit uses 19.2 MHz reference signal which isgenerates at the X1 and Q556.

• A-BAND CIRCUITThe 19.2 MHz reference signal is amplified at the LO ampli-fier (Q540), and is then applied to the FM IF IC (IC2, pin 2)as the 3rd LO signal.The signal is mixed with 2nd IF signal to convert into 3rd IFsignal. The 3rd IF signal is applied to one of demodulator(FM/WFM/AM/SSB) circuits.

• B-BAND CIRCUITThe 19.2 MHz reference signal is amplified at the LO ampli-fier (Q555), and is then applied to the FM IF IC (IC17, pin 2)as the 3rd LO signal.The signal is mixed with 2nd IF signal to convert into 3rd IFsignal. The 3rd IF signal is applied to the each demodulator(FM/WFM/AM) circuits.

4-2-6 DOWN CONVERTER VCO CIRCUIT(DOWNCONV BOARD)

The DOWN CONVERTER circuit uses 19.2 MHz referencesignal which is generates at the X1 and Q556 on the RF unit.

The DOWN CONVERTER VCO circuit (Q1 and D3) gener-ates 1001 MHz or 2002 MHz. The oscillated signal is ampli-fied at the buffer amplifier (Q4), and passes through bandswitch.

When receiving 1305–2305.999 MHz RF signals, 1001 MHzLO signal is selected. The RF signals pass through bandswitch (D6), and then pass through another band switch(D8).

When receiving 2306–3304.999 MHz, 2002 MHz LO signalis selectd. The RF signals pass through the band switch(D5), and then pass through the high-pass filter (L9, L10 andC28–C32). The signals passes through another band switch(D7).

The 1001 MHz or 2002 MHz LO signal is applied to themixer circuit (IC3, pin 3).

A part of oscillated signal from the DOWN CONVERTERVCO circuit is amplified at the buffer amplifier (Q2), and isthen applied to the PLL IC (IC4, pin 8) as the comparisonsignal, and is then output from pin 5. The signal passesthrough the loop filter (L6, C21, C22 and C40), and is thenapplied to the DOWN CONVERTER VCO circuit again asPLL lock voltage.

Q1, D1

VCO2NDVCO

Loopfilter

Q4A_R3V

OSC(19.2 MHz)

Ripplefilter

to the 2nd mixer (IC16, pin 3)

58

1

PLL ICIC1

Buffer

Q3

• 2ND D VCO CIRCUIT

D171 X1

REFCONT.

Q556

REFOSC

Q540

19.2 MHz 3rd LO signal

3rd mixer

FM IF IC (IC2)

2nd IF signal

to the demodulator circuits

LO

• 3RD LO CIRCUIT (A-BAND)

D171 X1

REFCONT.

Q556

REFOSC

Q555

19.2 MHz 3rd LO signal

3rd mixer

FM IF IC (IC17)

2nd IF signal

to the demodulator circuits

LO

• 3RD LO CIRCUIT (B-BAND)

D171 X1

REFCONT.

Q556

REFOSC

LPF

Q6

DOWNCONV BOARD

RF UNIT

19.2 MHz PLL ICIC4Buff

Q2

VCOQ1, D3

Buff

Q4

1001 MHz or 2002 MHz LO signal to the mixer (IC3)

Buff

• DOWN CONVERTER VCO CIRCUIT

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4-2-7 BFO CIRCUIT (LOGIC UNIT)The oscillated signal at the BFO VCO circuit (IC6, X2) isapplied to the MAIN unit via the J5 (pin 35) as the BFO, andis then amplified at the BFO amplifier (RF unit; Q530). Theamplified signal is mixed with 3rd IF signal to demodulate toAF signal on SSB/CW modes.

The carrier frequency is shifted by “BFO_SHIFT” signal fromthe main CPU (IC3, pin 2) while receiving SSB modes.

4-3 OTHER CIRCUITS4-3-1 BATTERY CHARGER CIRCUIT (LOGIC UNIT)When charging the installed battery (BP-206), the batterycharger control signal (CHGC) becomes high, and is thenoutput from the CPU (IC3, pin 39). The signal is applied tothe battery charger controller (Q34), and its output controlsthe battery charger circuit (Q31, D28, D29) to output 400 mA(typical) charging current.

4-3-2 BAR ANTENNA TUNING CIRCUIT (RF UNIT)When selecting the internal bar antenna while AM band sig-nals are receiving, the interal bar antenna switching signal isoutput from the D/A converter (IC22, pin 7) as “ANTSW” sig-nal. The signal is applied to the antenna switching circuit(Q510, D76), and then switches to the internal bar antenna.

The expander IC (IC14) outputs the “A-TRAC” bar antennacontrol signal from pin 8. The signal is applied to the levelconverter (Q513), and is then applied to the AM bar anten-na tune circuit (D100). The circuit tunes to the desire fre-quency to change the D100’s capacity.

4-3-3 EARPHONE ANTENNA CIRCUIT(LOGIC AND RF UNITS)

When selecting the earphone antenna while WFM bandreceiving, the received RF signal passes through the exter-nal speaker jack (LOGIC unit; J3). The signal is applied tothe RF unit via the J5, pin 4 as “EAR” signal. The signal isapplied to the antenna switch (RF unit; D101), and is thenapplied to the 30–300 MHz RF circuit.

4-3-4 RESET CIRCUIT (LOGIC UNIT)When [POWER] switch is ON, CPU3 signal from the +3 reg-ulator (IC8) is applied to the reset IC (IC2, pin 2). The IC out-puts reset signal via the “RESET” line, and the signal isapplied to the main CPU (IC3, pin 10) to reset it.

4-3-5 LCD BACKLIGHT CIRCUIT (LOGIC UNIT)When the LCD backlight is ON, the LCD backlight controlsignal becomes high, and is output from the main CPU (IC3,pin 41) as “LIGHT” signal. The signal is applied to the back-light control switch (Q2, Q4 and Q5), and is then applied tothe LCD backlight LEDs (DS1–DS9 and EP12).

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4 - 11

Description

Receive 3 V line from the LOGIC unit via the J1,pin 37. The voltage is supplied to the RF (IC19),IF (Q5) and LO (Q540) amplifiers, 1st (IC1) and2nd (IC10) mixers, regulators, etc.

Receive 3 V line from the LOGIC unit via the J1,pin 22. The voltage is supplied to the RF (IC18),IF (Q542) and LO (Q555) amplifiers, 1st (IC15)and 2nd (IC16) mixers, regulators, etc.

Receive 3 V converted from the A_R3V line bythe +3 regulator (Q509). The regulator is con-trolled by the HFC line from the main CPU(LOGIC unit; IC3, pin 46).

Common 3 V converted from the A_R3V line bythe +3 regulator (Q527). The regulator is con-trolled by the NBC line from the D/A converter(IC22, pin 13).

Receive 3 V converted from the A_R3V line bythe +3 regulator (Q501). The regulator is con-trolled by the A_300MC line from the expanderIC (IC14, pin 3).

Receive 3 V converted from the A_R3V line bythe +3 regulator (Q502). The regulator is con-trolled by the A_VHFC line from the expander IC(IC14, pin 2).

Receive 3 V converted from the A_R3V line bythe +3 regulator (Q502). The regulator is con-trolled by the A_UHFC line from the expander IC(IC14, pin 4).

Receive 3 V converted from the B_R3V line bythe +3 regulator (Q554). The regulator is con-trolled by the B_VHFC line from the expander IC(IC20, pin 2).

Receive 3 V converted from the B_R3V line bythe +3 regulator (Q554). The regulator is con-trolled by the B_UHFC line from the expander IC(IC20, pin 3).

Receive 3 V converted from the B_R3V line bythe +3 regulator (Q503). The regulator is con-trolled by the B_GC line from the expander IC(IC20, pin 4).

Receive 3 V converted from the B_R3V line bythe +3 regulator (Q503). The regulator is con-trolled by the B_800MC line from the expanderIC (IC20, pin 5).

Receive 3 V converted from the B_R3V line bythe +3 regulator (Q546). The regulator is con-trolled by the B_AMC line from the expander IC(IC20, pin 18).

Line

A_R3V

B_R3V

HF3V

NB3V

300M3V

A_VHF3V

A_UHF3V

B_VHF3V

B_UHF3V

B_G3V

B_800M3V

B_AM3V

4-4-3 RF UNIT VOLTAGE LINES

Description

The voltage is same as connected battery pack.The voltage is supplied to the charge controller(Q32).

Common 3 V converted from the VCC line orexternal DC power supply by the +3 regulator(IC8, pins 1 and 5). The output voltage is sup-plied to the main CPU (IC3), reset IC (IC2), EEP-ROM (IC1), etc.

Common 3 V converted from the CPU3V line bythe +3 regulator (Q13 and Q14). The regulator iscontrolled by the +3SC line from the main CPU(IC3, pin 40). The output voltage is supplied tothe electronics volume (IC7), pre-amplifiers (Q12and Q16), etc.

Common 3 V converted from the CPU3V line bythe +3 regulator circuit (Q17). The output voltageis supplied to the CI-V interface circuit (IC4, Q3and Q6), etc.

Receive 3 V converted from the VCC line orexternal DC power supply by the +3 regulators(IC9, pins 1 and 5; Q10). The regulator is con-trolled by the A_R3C line from the main CPU(IC3, pin 67). The output voltage is supplied tothe RF unit, etc.

Receive 3 V converted from the VCC line orexternal DC power supply by the +3 regulators(IC9, pins 1 and 5; Q15). The regulator is con-trolled by the B_R3C line from the main CPU(IC3, pin 75). The output voltage is supplied tothe RF unit, etc.

Line

VCC

CPU3V

+3S

+3V

A_R3

B_R3

4-4 POWER SUPPLY CIRCUITS4-4-1 LOGIC UNIT VOLTAGE LINES

Description

Common 3 V from the LOGIC unit via the J7, pin1, and is then supplied to the SUB_3V regulator(Q2). The regulator is controlled by SUB_3C linefrom the sub CPU (IC2, pin 45).

Common 3 V converted from +3V line by theSUB_3V regulator (Q2). The output voltage issupplied to the sub CPU (IC2), memory (IC6),RECORDING IC (IC7), etc.

Line

+3V

SUB_3V

4-4-2 REC UNIT VOLTAGE LINES

Description

Common 3 V from the LOGIC unit via the J7, pin1, and is then supplied to the SUB_3V regulator(Q2). The regulator is controlled by SUB_3C linefrom the sub CPU (IC2, pin 45).

Common 3 V converted from +3V line by theSUB_3V regulator (Q2). The output voltage issupplied to the sub CPU (IC2), memory (IC6),RECORDING IC (IC7), etc.

Line

+3V

SUB_3V

4-4-2 REC UNIT VOLTAGE LINES

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4 - 12

48

49–52

53

54

55–61

63

64

65

66

67

68

69

70

71

72

74

75

76

77

78

79–81

98

99

Outputs strobe signal to the D/A con-verter IC (IC22, pin 1).

Output key matrix signals.

• Input port for the matrix signal.• Outputs power ON/OFF control sig-

nal.

• Input port for the matrix signal.• Outputs B-RTONE filter amplifier

control signal.

Input ports for key matrix

Outputs B-BAND de-emphasis controlsignal.

Outputs strobe signals to the A-BAND1st LO circuit.

Outputs strobe signals to the A-BAND2nd LO circuit.

Outputs strobe signals to the DOWNCONVERTER LO circuit.

Outputs A-BAND power supply circuitcontrol signal.

Low : While A-BAND receiving.

Outputs clock signal to the PLL IC.

Outputs strobe signals to the B-BAND2nd LO circuit.

Outputs strobe signals to the B-BAND1st LO circuit.

Outputs A-RTONE filter amplifier con-trol signal.

Outputs LCD chip select signal.

Outputs BFO control signal.Low : While SSB is receiving.

Outputs B-BAND power supply circuitcontrol signal.

Low : While B-BAND receiving.

Outputs reset signal to the LCD.

Outputs command and data signals tothe LCD.

Outputs strobe signals to the expanderIC (RF unit; IC20, pin 15).

Output B-BAND 1st LO circuit controlsignals.

Outputs clock signal to the EEPROM(IC1, pin 6).

I/O port for data signal from/to theEEPROM (IC1, pin 5).

STR2

KS3–KS1

I1PCON

L0B_TCON

KR5–KR0

B_AF_THURU

PLLASTB

PLLCSTB

PLLESTB

A_R3C

PLLCK

PLLDSTB

PLLBSTB

A_TCON

LCD_CS

BFOC

B_R3C

LCD_RESET

LCD_RS

LD2

B_VCO2B_VCO3B_VCO4

ECK

ESIO

(LOGIC unit; IC3)–Continued

Pin PortDescriptionnumber name

3

89

46

17

18

19

20

21–24

25

26

31

34

36

38

39

40

41

42

43

44

45

46

47

Outputs data and clock control signal.

Output clock shift signals.

Input port for the detecting signalwhether the external power supply isconnecting or not.

Low : The external power supply isconnected.

Outputs control signal to the AF ampli-fier.

Input port for [POWER] key.

Outputs B-band mute control signal.High : While B-band is muting.

Outputs A-BAND de-emphasis controlsignal.

Input ports for [A-DIAL]/[B-DIAL].

Input port for [SQL] switch.Low : While [SQL] switch is pushed.

Outputs REC unit regulator control sig-nal.

High : While recording or playing.

Outputs A-BAND’s 1st LO control sig-nal.

Outputs strobe signals for volume.

Outputs recording LED control signal.

Outputs charging current control sig-nal.

High : While rapid charging.

Outputs charger circuit control signal.High : While charging.

Outputs +3S regulator control signal.

Outputs LCD back light control signal.Low : Lights ON.

Outputs strobe signals to the expanderIC (RF unit; IC14, pin 15).

Outputs BAND2 selecting signal in theHF band.

Outputs BAND3 selecting signal in theHF band.

Outputs BAND1 selecting signal in theHF band.

Outputs HF band selecting signal at A-BAND.

Outputs data signal to the PLL IC.

4-5 PORT ALLOCATIONS4-5-1 MAIN CPU PORT ALLOCATIONS

(LOGIC UNIT; IC3)

DATAC

CLS1CLS0

HVDET

AFON

POWER

B_AMUTE

A_AF_THURU

A_DUDA_DCKB_DUDB_DCK

SQL

SUB_3C

A_VCO1

VRSTR

REC

CHGS

CHGC

+3S

LIGHT

LD1

B2C

B3C

B1C

HFC

PLLDATA

Pin PortDescriptionnumber name

Page 21: ICOM IC R20 Service Manual

4 - 13

18

19

24

25

26–28

3536

25

Input port for the USB reset signal.

Input port for the USB suspend signal.

Outputs recording/playing select sig-nal.

Input port for the ADPCM commandwaiting signal.

Input ports for the ADPCM buffer sig-nals.

Output recording mute signals.

Input port for the power supply verify-ing signal.

4-5-2 SUB CPU PORT ALLOCATIONS(REC UNIT; IC2)

RSTO

PWREN

FIFOST

CBUSY

EMPMIDFUL

B_SQLA_SQL

SUB_3C

Pin PortDescriptionnumber name

4

5

6

7

11

12

13

14

Outputs the down converter controlsignal.

Outputs 2002 MHz LO select signal forthe down converter.

Outputs 1001 MHz LO select signal forthe down converter.

Outputs the bar antenna select signal.High : The bar antenna is selected.

Outputs the power save control signalto the A-BAND circuit.

Low : While the A-BAND circuit ispower saving.

Outputs WFM mode select signal atthe A-BAND circuit.

Outputs noise blanker control signal.

Outputs the power save control signalto the B-BAND circuit.

Low : While the B-BAND circuit ispower saving.

DOWN_CONV

2GLO

1GLO

ANTSW

APS

A_WFM

NBC

BPS

Pin PortDescriptionnumber name

4-5-3 EXPANDER IC PORT ALLOCATIONS(RF UNIT; IC22)

2

3

4

6

7

13

18

19

Outputs VHF band selecting signal atthe A-BAND circuit.

Outputs 300 MHz band selecting sig-nal at the A-BAND circuit.

Outputs UHF band selecting signal atthe A-BAND circuit.

Outputs the A-BAND 1st LO circuitcontrol signal.

Outputs narrow FM mode selectingsignal at the A-BAND circuit.

Outputs ANL (Automatic Noise Limiter)control signal at A-BAND circuit.

High : While ANL is ON.

Outputs AM mode selecting signal atthe A-BAND circuit.

Outputs narrow SSB mode selectingsignal at the A-BAND circuit.

A_VHFC

A_300MC

A_UHFC

A_VCO3

A_NFMC

A_ANLC

A_AMC

SSBC

Pin PortDescriptionnumber name

4-5-4 D/A CONVERTER IC PORT ALLOCATIONS(RF UNIT; IC14)

2

3

4

5

7

8

9

18

19

Outputs VHF band selecting signal atthe B-BAND circuit.

Outputs UHF band selecting signal atthe B-BAND circuit.

Outputs GHz band selecting signal atthe B-BAND circuit.

Outputs 800 MHz band selecting sig-nal at the B-BAND circuit.

Outputs wide FM mode selecting sig-nal at the B-BAND circuit.

Outputs the B-BAND 1st LO circuitcontrol signal.

Outputs ANL (Automatic Noise Limiter)control signal at B-BAND circuit.

High : While B-BAND ANL is ON.

Outputs AM mode selecting signal atthe B-BAND circuit.

Outputs narrow AM or narrow FMmode selecting signal at the B-BANDcircuit.

B_VHFC

B_UHFC

B_GC

B-800MC

A_WFMC

B_VCO1

B_ANLC

A_AMC

B_AM_FM

Pin PortDescriptionnumber name

4-5-5 D/A CONVERTER IC PORT ALLOCATIONS(RF UNIT; IC20)

Page 22: ICOM IC R20 Service Manual

4 - 14

4-6 BC-156 CIRCUIT DESCRIPTION4-6-1 DC/DC CONVERTER CIRCUIT (MAIN UNIT)Input voltage (8–16 V) from the BC-123A/E pass throughreverse protection circuit (D6) via the J1. The voltage passthrough the current limiter (R19) which can pass less than2.0 A via the fuse (F1), and is then applied to the DC/DCconverter circuit (IC2, Q7, D2, L1 and C4). The circuit con-verts 8–16 V input voltage to obtain approximately 5.2 V/2 A,and the converted voltage is applied to the charging circuit(IC1, Q1).

4-6-2 CHARGING CIRCUIT(MAIN UNIT AND TANSHI BOARD)

The converted voltage from the DC/DC converter circuit isapplied to the charging circuit (MAIN unit; IC1, Q1), and isthen applied to the TANSHI board via the J4, pins 1 and 2(MAIN unit) as “CHGOUT” signal. The signal passesthrough the charging current detector (R1), and is thenapplied to the charging selector (TANSHI board; RL1) whichis controlled by “CONT” signal. The signal is then applied tothe CP1 (TANSHI board) as “SBATT+” signal or CP4 as“BATT+” signal.

A part of “CHGOUT” signal is applied to the charging circuit(IC1, pins 13 and 14) via the J1, pin 6 (TANSHI board) to control battery charging.

4-6-3 CHARGING CONTROL CIRCUIT(MAIN UNIT AND TANSHI BOARD)

• CHARGING THE BATTERY WITH IC-R20The “DET2” signal from the TANSHI board is applied to theD5 (MAIN unit) via the J4 (MAIN unit), and is then applied tothe Q4 (MAIN unit). As Q4 turns ON, the output signal fromQ4 is applied to the D4. The signal is applied to the Q3 toturn ON, then the output signal from Q3 is applied to thecharging control IC (MAIN unit; IC1, pin 2). The IC controlsQ1’s base voltage to keep stable voltage/current batterycharging.

A part of signal from Q4 (MAIN unit) is applied to the charg-ing selector circuit (TANSHI board; RL1) via the J1, pin 8(TANSHI board) as “CONT” signal.

• CHARGING THE BATTERY ONLYThe “DET1” signal from the TANSHI board is applied to theD5 (MAIN unit) via the J4 (MAIN unit), and is then applied tothe Q2 (MAIN unit). As Q2 turns ON, the output signal fromQ2 is applied to the D4. The signal is applied to the Q3 toturn ON, then the output signal from Q3 is applied to thecharging control IC (MAIN unit; IC1, pin 2). The IC controlsQ1’s base voltage to keep stable voltage/current batterycharging.

Protectioncircuit

D6 IC1, Q7, D2,L4, C1

to the charging circuit

from theBC-123A/E DC/DC

converterR19F1

Currentlimiter

Chargingcircuit

IC1, Q1

MAIN UNIT TANSHI BOARD

Converted5.2 V/2 A

"CONT" signalfrom Q6 (MAIN unit)

SelectorRL1

CP3 (DET1)

CP2 (SBATT )

CP1 (SBATT+)

CP6 (DET2)

CP5 (BATT )

CP4 (BATT+)

"DET1" signal to D5 (MAIN unit)

"DET2" signal to D5 (MAIN unit)

R1

Currentdetector

Chargingcontroller

CP3 (DET1)

CP6 (DET2)

D5

Q2

Q4D4

Q3

IC1

Q1

D1

"CHGOUT" signal to thecharger selector (RL1)

5.2 V/2 A from theDC/DC converter circuit

• DC/DC CONVERTER CIRCUIT

• CHARGING CIRCUIT

• CHARGING CONTROL CIRCUIT

Page 23: ICOM IC R20 Service Manual

5 - 1

SECTION 5 ADJUSTMENT PROCEDURES

5-1 PREPARATIONAlmost adjustments must be adjusted on the adjustment mode. The shorten plug (see below) is required when entering theadjustment mode.

‘‘ REQUIRED TEST EQUIPMENT

‘‘ ENTERING THE ADJUSTMENT MODEq Connect the shorten plug to the [SP] jack.w Push and hold [8 SET], [MR S.MW], [BAND] and [MAIN/SUB] keys, and then turn power ON.NOTE: Entering adjustment mode, keep on entering adjustment mode until dis-connect the shorten plug and turn power OFF.

OPERATION ON THE ADJUSTMENT MODEChange the adjustment channel or item [UP] : [MR S.MW] keyChange the adjustment channel or item [DOWN] : [SCOPE] keyChange the adjustment value : [R-DIAL]

While entering adjustment mode, some adjustments must push [• LOCK] or [8 SET] keys to write the adjustment value to theCPU. Refer to following list in detail.

KEY

[• LOCK]

[8 SET]

OPERATION

Write the REFERENCE FREQUENCY ADJUSTMENT value.

Write the BFO ADJUSTMENT value.

Write the AFC ADJUSTMENT value.

Write the TRACKING ADJUSTMENT value.

Write the S-METER ADJUSTMENT value.

EQUIPMENT

DC power supply

Frequency counter

GRADE AND RANGE

Output voltage : 6.0 V DCCurrent capacity : 1 A or more

Frequency range : 0.1–1000 MHzFrequency accuracy : ±1 ppm or betterSensitivity : 100 mV or better

EQUIPMENT

Digital multimeter

Standard signal generator (SSG)

GRADE AND RANGE

Input impedance : 10 kΩ/V DC or better

Frequency range : 0.1–3000 MHzOutput level : 0.1 µV–32 mV

(–127 to –17 dBm)

IC-R20

to [DC]jack

to [SP] jack

3.5(d) mm

GNDI/O

to the antenna connectorStandard signal generator0.1 V to 32 mV

( 127 dBm to 17 dBm)

Power supply6 V / 1 A

JIG

3-conductor 3.5(d) mm plug must be used.

Shorten I/O and GND line.

‘‘ CONNECTIONS

Page 24: ICOM IC R20 Service Manual

5 - 2

5-2 SOFTWARE ADJUSTMENTS

REFERENCEFREQUENCY[REF]

CENTERVOLTAGE

BFO[LSB]

[USB]

[CW]

SSB-IFSHIFT[LSB-IFS]

[USB-IFS]

1

1

2

1

2

3

1

2

3

4

• Connect the frequency counter to the check pointCP18 on the RF unit.

• Receiving

• Dual watch mode : ON• Set the receiver to [A-BAND] and FM mode.• Operating frequency : 145.100 MHz• Connect an SSG to the antenna connector and set as

Level : 1 mV* (–47 dBm)Frequency : 145.100 MHzModulation : OFF

• Connect the Digital multimeter to the check point CP1on the RF unit.

• Receiving

• Set the receiver to [B-BAND] and FM mode.• Operating frequency : 145.100 MHz• Connect an SSG to the antenna connector and set as

Level : 1 mV* (–47 dBm)Frequency : 145.100 MHzModulation : OFF

• Connect the Digital multimeter to the check point CP11on the RF unit.

• Receiving

• Connect the frequency counter to the check point onthe LOGIC unit (See page 5-3).

• Receiving

• Connect the frequency counter to the check point onthe LOGIC unit (See page 5-3).

• Receiving

• Connect the frequency counter to the check point onthe LOGIC unit (See page 5-3).

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 14.0990 MHzModulation : OFF

• Receiving

• Set an SSG asLevel : A+ 35 dBFrequency : 14.1005 MHzModulation : OFF

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 14.1010 MHzModulation : OFF

• Receiving

• Set an SSG asLevel : A+ 35 dBFrequency : 14.0995 MHzModulation : OFF

• Receiving

• Rotate [R-DIAL] to set to 247.05000 MHz.• Push [• LOCK] key.

• Adjust L21 to CP1 voltage to be 1.0 V.

• Adjust L105 to CP11 voltage to be 1.0 V.

• Rotate [R-DIAL] to set to 448.5 kHz.• Push [• LOCK] key.

• Rotate [R-DIAL] to set to 451.5 kHz.• Push [• LOCK] key.

• Rotate [R-DIAL] to set to 449.2 kHz.• Push [• LOCK] key.

• Set an SSG’s level to 10 dB S/N sensitivity (A).• Measure the AF output level while the IC-R20

outputs 1 kHz signal (B).

• Measure the AF output level (C).• If AF output level C is lower than B, skip this

adjustment.• If AF output level C is higher than B, rotate

[R-DIAL] to adjust the AF output level to the samelevel as B.

• Push [• LOCK] key.

• Set an SSG’s level to 10 dB S/N sensitivity (A).• Measure the AF output level while the IC-R20

outputs 1 kHz signal (B).

• Measure the AF output level (C).• If AF output level C is lower than B, skip this

adjustment.• If AF output level C is higher than B, rotate

[R-DIAL] to adjust the AF output level to the samelevel as B.

• Push [• LOCK] key.

ADJUSTMENT ADJUSTMENT CONDITION OPERATION

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.

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5 - 3

CP11Center voltage check point (B-BAND)

Center voltage adjustment (B-BAND)L105

CP1Center voltage check point (A-BAND)

Center voltage adjustment (A-BAND)L21

• RF UNIT BOTTOM VIEW

BFO check point

• BFO CHECK POINT (LOGIC UNIT TOP VIEW)

Reference frequency check pointCP18

• RF UNIT TOP VIEW

Page 26: ICOM IC R20 Service Manual

5 - 4

SOFTWARE ADJUSTMENTS–Continued

AFC[AFC](FMA-BAND)

(WFMA-BAND)

(FMB-BAND)

(WFMB-BAND)

TRACKING[TRL/TRH](0.495 MHzBar Antennatuning)

(1.620 MHzBar Antennatuning)

(118.1 MHzRF amplifiertuning)

(174.9 MHzRF amplifiertuning)

(330.1 MHzRF amplifiertuning)

(469.9 MHzRF amplifiertuning)

(118.1 MHzRF amplifiertuning)

(174.9 MHzRF amplifiertuning)

(330.1 MHzRF amplifiertuning)

(469.9 MHzRF amplifiertuning)

(470.1 MHzRF amplifiertuning)

(599.9 MHzRF amplifiertuning)

1

2

3

4

1

2

3

4

5

6

7

8

9

10

11

12

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 1 mV* (–47 dBm)Frequency : 145.100 MHzModulation : OFF

• Receiving

• Mode : WFM• Receiving

• Mode : FM• Receiving

• Mode : WFM• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 71 mV* (–10 dBm)Frequency : 0.495 MHzModulation : ±1 kHzDeviation : ±3.5 kHz

• Receiving

• Connect an SSG to the antenna connector and set asLevel : 220 mV* (0 dBm)Frequency : 1.620 MHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 118.1 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 174.9 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 330.1 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 469.9 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 118.1 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 174.9 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 330.1 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 469.9 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 470.1 MHz

• Receiving

• Connect an SSG to the antenna connector and set asFrequency : 599.9 MHz

• Receiving

• Push [• LOCK] key.

• Push [• LOCK] key.

• Push [• LOCK] key.

• Push [• LOCK] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

ADJUSTMENT ADJUSTMENT CONDITION OPERATION

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.

Page 27: ICOM IC R20 Service Manual

5 - 5

SOFTWARE ADJUSTMENTS–Continued

S-METER[S-M](1.81 MHzFM mode)

(1.81 MHzWFM mode)

(14.1 MHzFM mode)

(14.1 MHzWFM mode)

(145.1 MHzFM mode)

(145.1 MHzWFM mode)

(201.1 MHzFM mode)

(201.1 MHzWFM mode)

(435.1 MHzFM mode)

(435.1 MHzWFM mode)

1

2

3

4

5

6

7

8

9

10

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 1.81 MHzModulation : ±1 kHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 14.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 145.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 201.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 435.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Modulation : ±52.5 kHz

• Receiving

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

ADJUSTMENT ADJUSTMENT CONDITION OPERATION

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.

Page 28: ICOM IC R20 Service Manual

5 - 6

SOFTWARE ADJUSTMENTS–Continued

S-METER[S-M](1400.1 MHzFM mode)

(1400.1 MHzWFM mode)

S-METER[S-M](145.1 MHzFM mode)

(145.1 MHzWFM mode)

(435.1 MHzFM mode)

(435.1 MHzWFM mode)

(650.1 MHzFM mode)

(650.1 MHzWFM mode)

(1100.1 MHzFM mode)

(1100.1 MHzWFM mode)

11

12

13

14

15

16

17

18

19

20

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 1400.1 MHzModulation : ±1 kHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 145.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 435.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 650.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Deviation : ±52.5 kHz

• Receiving

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 1100.1 MHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 5.6 µV* (–92 dBm)Modulation : ±52.5 kHz

• Receiving

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

• Push [8 SET] key.

ADJUSTMENT ADJUSTMENT CONDITION OPERATION

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.

Page 29: ICOM IC R20 Service Manual

5 - 7

SOFTWARE ADJUSTMENTS–Continued

S-METER[S-M](2510.1 MHzFM mode)

(2510.1 MHzWFM mode)

21

22

• Mode : FM• Connect an SSG to the antenna connector and set as

Level : 0.56 µV* (–112 dBm)Frequency : 2510.1 MHzModulation : ±1 kHzDeviation : ±3.5 kHz

• Receiving

• Mode : WFM• Connect an SSG to the antenna connector and set as

Level : 32 µV* (–77 dBm)Deviation : ±52.5 kHz

• Receiving

• Push [8 SET] key.

• Push [8 SET] key.

ADJUSTMENT ADJUSTMENT CONDITION OPERATION

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.

Page 30: ICOM IC R20 Service Manual

[1STAVCO BOARD][1STAVCO BOARD]

IC2 1110005180 S.IC µPC2746TB-E3 BIC3 1130011660 S.IC MB15T61ULPVA-G-ER B

Q1 1530003260 S.TRANSISTOR 2SC5006-T1 TQ2 1530003260 S.TRANSISTOR 2SC5006-T1 TQ3 1530003260 S.TRANSISTOR 2SC5006-T1 TQ6 1560000530 S.FET 2SK880-GR (TE85R) BQ7 1530003000 S.TRANSISTOR 2SC4117-BL (TE85R) BQ8 1530003580 S.TRANSISTOR 2SC5231C8-TL BQ9 1530003580 S.TRANSISTOR 2SC5231C8-TL BQ11 1590001810 S.TRANSISTOR XP1113 (TX) BQ12 1590001810 S.TRANSISTOR XP1113 (TX) BQ13 1530003590 S.TRANSISTOR 2SC5277D2-TL B

D1 1720000400 S.VARICAP 1SV245 (TPH3) TD2 1720000400 S.VARICAP 1SV245 (TPH3) TD3 1750001050 S.VARICAP HVC417CTRU TD4 1750001050 S.VARICAP HVC417CTRU TD7 1790001620 S.DIODE 1SV308 (TPL3) TD8 1790001620 S.DIODE 1SV308 (TPL3) TD9 1790001620 S.DIODE 1SV308 (TPL3) T

L1 6200009350 S.COIL ELJRE R22G-F3 TL2 6200009350 S.COIL ELJRE R22G-F3 TL3 6200010030 S.COIL C2012C-15NG TL4 6200003960 S.COIL MLF1608A 1R0K-T TL5 6200009350 S.COIL ELJRE R22G-F3 TL6 6200009980 S.COIL C2012C-18NG TL7 6200003960 S.COIL MLF1608A 1R0K-T TL8 6200009350 S.COIL ELJRE R22G-F3 TL9 6200009280 S.COIL LQW18AN27NG00D (LQW1608A27NG00) TL10 6200003960 S.COIL MLF1608A 1R0K-T T

R1 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR2 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR3 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR4 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) TR5 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR6 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR7 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR8 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR9 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) TR10 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR11 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR12 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR13 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR14 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) TR15 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR23 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR24 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) BR25 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR26 7030005290 S.RESISTOR ERJ2GEJ 682 X (6.8 kΩ) BR27 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) BR28 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR29 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR30 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR31 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR32 7030007270 S.RESISTOR ERJ2GEJ 151 X (150 Ω) BR33 7030007260 S.RESISTOR ERJ2GEJ 330 X (33 Ω) BR34 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR35 7030009140 S.RESISTOR ERJ2GEJ 272 X (2.7 kΩ) BR36 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR37 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR38 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR40 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR41 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) BR42 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) BR43 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR44 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR45 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) B

S.=Surface mount

R46 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR47 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR48 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR49 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR50 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR51 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR52 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR53 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) BR54 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR55 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ)

[EUR], [UK], [USA], [CAN] B7030010040 S.RESISTOR ERJ2GE-JPW

[SEA], [EXP-01], [EXP-02] BR56 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ)

[EUR], [UK], [USA], [CAN] B7030010040 S.RESISTOR ERJ2GE-JPW

[SEA], [EXP-01], [EXP-02] BR57 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ)

[EUR], [UK], [USA], [CAN] B7030010040 S.RESISTOR ERJ2GE-JPW

[SEA], [EXP-01], [EXP-02] B

C1 4030017460 S.CERAMIC ECJ0EB1E102K TC2 4030017460 S.CERAMIC ECJ0EB1E102K TC3 4030017360 S.CERAMIC ECJ0EC1H030B TC4 4030017570 S.CERAMIC ECJ0EC1H040B TC5 4030017460 S.CERAMIC ECJ0EB1E102K TC6 4030016930 S.CERAMIC ECJ0EB1A104K TC7 4030017530 S.CERAMIC ECJ0EC1H0R5B TC8 4030016930 S.CERAMIC ECJ0EB1A104K TC9 4030017460 S.CERAMIC ECJ0EB1E102K TC10 4030017460 S.CERAMIC ECJ0EB1E102K TC11 4030017350 S.CERAMIC ECJ0EC1H020B TC12 4030017460 S.CERAMIC ECJ0EB1E102K TC13 4030016930 S.CERAMIC ECJ0EB1A104K TC14 4030017530 S.CERAMIC ECJ0EC1H0R5B TC15 4030016930 S.CERAMIC ECJ0EB1A104K TC16 4030017360 S.CERAMIC ECJ0EC1H030B TC17 4030017460 S.CERAMIC ECJ0EB1E102K TC18 4030017460 S.CERAMIC ECJ0EB1E102K TC19 4030017600 S.CERAMIC ECJ0EC1H080C TC20 4030017570 S.CERAMIC ECJ0EC1H040B TC21 4030017460 S.CERAMIC ECJ0EB1E102K TC22 4030016930 S.CERAMIC ECJ0EB1A104K TC23 4030017530 S.CERAMIC ECJ0EC1H0R5B TC24 4030016930 S.CERAMIC ECJ0EB1A104K TC31 4030016790 S.CERAMIC ECJ0EB1C103K BC35 4030017770 S.CERAMIC ECJ0EB1E332K BC37 4550003220 S.TANTALUM TEESVA 1E 105M8L BC38 4550000930 S.TANTALUM TEESVA 1D 684M8L BC39 4550000930 S.TANTALUM TEESVA 1D 684M8L BC40 4030016790 S.CERAMIC ECJ0EB1C103K TC41 4030017460 S.CERAMIC ECJ0EB1E102K BC42 4030017460 S.CERAMIC ECJ0EB1E102K BC43 4030017350 S.CERAMIC ECJ0EC1H020B BC44 4030017460 S.CERAMIC ECJ0EB1E102K BC46 4030017460 S.CERAMIC ECJ0EB1E102K BC47 4030017460 S.CERAMIC ECJ0EB1E102K BC48 4340000290 S.MYLAR ECHU 1C 103JX5 BC49 4030017620 S.CERAMIC ECJ0EC1H100C BC50 4030017380 S.CERAMIC ECJ0EC1H050B BC52 4030017460 S.CERAMIC ECJ0EB1E102K BC53 4030017460 S.CERAMIC ECJ0EB1E102K BC54 4030017460 S.CERAMIC ECJ0EB1E102K TC55 4030017460 S.CERAMIC ECJ0EB1E102K TC56 4030017460 S.CERAMIC ECJ0EB1E102K TC58 4030016930 S.CERAMIC ECJ0EB1A104K BC59 4030016790 S.CERAMIC ECJ0EB1C103K BC60 4030016790 S.CERAMIC ECJ0EB1C103K BC61 4030016930 S.CERAMIC ECJ0EB1A104K BC62 4030016930 S.CERAMIC ECJ0EB1A104K BC63 4030017460 S.CERAMIC ECJ0EB1E102K BC64 4550007040 S.TANTALUM ECST0JZ106R BC65 4550007040 S.TANTALUM ECST0JZ106R BC66 4550007040 S.TANTALUM ECST0JZ106R B

6 - 1

SECTION 6 PARTS LIST

REF ORDER DESCRIPTION M.NO. NO.

REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

6-1 IC-R20

Page 31: ICOM IC R20 Service Manual

[1STBVCO BOARD][1STAVCO BOARD]

C67 4030017460 S.CERAMIC ECJ0EB1E102K[EUR], [UK], [USA], [CAN] B

J1 6910015520 CONNECTOR IMSA-9230B-1-07Z064-T BJ2 6910015510 CONNECTOR IMSA-9230B-1-08Z064-T B

EP1 0910058163 PCB B 6080C

IC2 1110005180 S.IC µPC2746TB-E3 BIC3 1130011660 S.IC MB15T61ULPVA-G-ER B

Q1 1530003260 S.TRANSISTOR 2SC5006-T1 TQ2 1530003260 S.TRANSISTOR 2SC5006-T1 TQ3 1530003260 S.TRANSISTOR 2SC5006-T1 TQ4 1530003260 S.TRANSISTOR 2SC5006-T1 TQ5 1530003260 S.TRANSISTOR 2SC5006-T1 TQ6 1560000530 S.FET 2SK880-GR (TE85R) BQ7 1530003000 S.TRANSISTOR 2SC4117-BL (TE85R) BQ8 1530003580 S.TRANSISTOR 2SC5231C8-TL BQ9 1530003580 S.TRANSISTOR 2SC5231C8-TL BQ10 1590001810 S.TRANSISTOR XP1113 (TX) BQ11 1590001810 S.TRANSISTOR XP1113 (TX) BQ12 1530003590 S.TRANSISTOR 2SC5277D2-TL B

D1 1720000400 S.VARICAP 1SV245 (TPH3) TD2 1720000400 S.VARICAP 1SV245 (TPH3) TD3 1750001050 S.VARICAP HVC417CTRU TD4 1750001050 S.VARICAP HVC417CTRU TD5 1750001050 S.VARICAP HVC417CTRU TD7 1790001620 S.DIODE 1SV308 (TPL3) TD8 1790001620 S.DIODE 1SV308 (TPL3) TD9 1790001620 S.DIODE 1SV308 (TPL3) TD10 1790001620 S.DIODE 1SV308 (TPL3) T

L1 6200009350 S.COIL ELJRE R22G-F3 TL2 6200009350 S.COIL ELJRE R22G-F3 TL3 6200010020 S.COIL C2012C-12NG TL4 6200003960 S.COIL MLF1608A 1R0K-T TL5 6200009350 S.COIL ELJRE R22G-F3 TL6 6200010020 S.COIL C2012C-12NG TL7 6200003960 S.COIL MLF1608A 1R0K-T TL8 6200009350 S.COIL ELJRE R22G-F3 TL9 6200009280 S.COIL LQW18AN27NG00D (LQW1608A27NG00) TL10 6200003960 S.COIL MLF1608A 1R0K-T TL11 6200004940 S.COIL MLF1608D R27K-T TL12 6200010210 S.COIL C2012C-22NG TL13 6200005740 S.COIL ELJRE 47NG-F TL14 6200005740 S.COIL ELJRE 47NG-F T

R1 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR2 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR3 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR4 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) TR5 7030007250 S.RESISTOR ERJ2GEJ 220 X (22 Ω)

[SEA], [EXP-01], [EXP-02] T7030009160 S.RESISTOR ERJ2GEJ 181 X (180 Ω)

[EUR], [UK], [USA], [CAN] TR6 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR7 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR8 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR9 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) TR10 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω)

[EUR], [UK], [USA], [CAN] T7030007250 S.RESISTOR ERJ2GEJ 220 X (22 Ω)

[SEA], [EXP-01], [EXP-02] TR11 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR12 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR13 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T

S.=Surface mount

R14 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) TR15 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) TR16 7030005290 S.RESISTOR ERJ2GEJ 682 X (6.8 kΩ) TR17 7030005710 S.RESISTOR ERJ2GEJ 121 X (120 Ω) TR18 7030005290 S.RESISTOR ERJ2GEJ 682 X (6.8 kΩ) TR19 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR23 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR24 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) BR25 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR26 7030005290 S.RESISTOR ERJ2GEJ 682 X (6.8 kΩ) BR27 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) BR28 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR29 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR30 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR31 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR32 7030007270 S.RESISTOR ERJ2GEJ 151 X (150 Ω) BR33 7030007260 S.RESISTOR ERJ2GEJ 330 X (33 Ω) BR34 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR35 7030009140 S.RESISTOR ERJ2GEJ 272 X (2.7 kΩ) BR36 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR37 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR38 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR39 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR40 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR41 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) BR42 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) BR43 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR44 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR45 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR46 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR47 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR48 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR49 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR50 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR51 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR52 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR53 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) BR54 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR55 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ)

[EUR], [UK], [USA], [CAN] B7030010040 S.RESISTOR ERJ2GE-JPW

[SEA], [EXP-01], [EXP-02] BR56 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ)

[EUR], [UK], [USA], [CAN] B7030010040 S.RESISTOR ERJ2GE-JPW

[SEA], [EXP-01], [EXP-02] BR57 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ)

[EUR], [UK], [USA], [CAN] B7030010040 S.RESISTOR ERJ2GE-JPW

[SEA], [EXP-01], [EXP-02] B

C1 4030017460 S.CERAMIC ECJ0EB1E102K TC2 4030017460 S.CERAMIC ECJ0EB1E102K TC3 4030017350 S.CERAMIC ECJ0EC1H020B TC4 4030017350 S.CERAMIC ECJ0EC1H020B TC5 4030017460 S.CERAMIC ECJ0EB1E102K TC6 4030016930 S.CERAMIC ECJ0EB1A104K TC7 4030017530 S.CERAMIC ECJ0EC1H0R5B TC8 4030016930 S.CERAMIC ECJ0EB1A104K TC9 4030017460 S.CERAMIC ECJ0EB1E102K TC10 4030017460 S.CERAMIC ECJ0EB1E102K TC11 4030017350 S.CERAMIC ECJ0EC1H020B TC12 4030017460 S.CERAMIC ECJ0EB1E102K TC13 4030016930 S.CERAMIC ECJ0EB1A104K TC14 4030017530 S.CERAMIC ECJ0EC1H0R5B TC15 4030016930 S.CERAMIC ECJ0EB1A104K TC16 4030017570 S.CERAMIC ECJ0EC1H040B TC17 4030017460 S.CERAMIC ECJ0EB1E102K TC18 4030017460 S.CERAMIC ECJ0EB1E102K TC19 4030017600 S.CERAMIC ECJ0EC1H080C TC20 4030017570 S.CERAMIC ECJ0EC1H040B TC21 4030017460 S.CERAMIC ECJ0EB1E102K TC22 4030016930 S.CERAMIC ECJ0EB1A104K TC23 4030017530 S.CERAMIC ECJ0EC1H0R5B TC24 4030016930 S.CERAMIC ECJ0EB1A104K TC25 4030017460 S.CERAMIC ECJ0EB1E102K TC26 4030017460 S.CERAMIC ECJ0EB1E102K TC27 4030017540 S.CERAMIC ECJ0EC1HR75B TC28 4030017540 S.CERAMIC ECJ0EC1HR75B TC29 4030017460 S.CERAMIC ECJ0EB1E102K T

6 - 2

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

REF ORDER DESCRIPTION M.NO. NO.

[1STBVCO BOARD]

Page 32: ICOM IC R20 Service Manual

[2NDCVCO BOARD][1STBVCO BOARD]

C30 4030017460 S.CERAMIC ECJ0EB1E102K TC31 4030017460 S.CERAMIC ECJ0EB1E102K BC35 4030017770 S.CERAMIC ECJ0EB1E332K BC37 4550003220 S.TANTALUM TEESVA 1E 105M8L BC38 4550000930 S.TANTALUM TEESVA 1D 684M8L BC39 4550000930 S.TANTALUM TEESVA 1D 684M8L BC40 4030016790 S.CERAMIC ECJ0EB1C103K BC41 4030017460 S.CERAMIC ECJ0EB1E102K BC42 4030017460 S.CERAMIC ECJ0EB1E102K BC43 4030017350 S.CERAMIC ECJ0EC1H020B BC44 4030017460 S.CERAMIC ECJ0EB1E102K BC45 4030017530 S.CERAMIC ECJ0EC1H0R5B TC46 4030017460 S.CERAMIC ECJ0EB1E102K BC47 4030017460 S.CERAMIC ECJ0EB1E102K BC48 4340000290 S.MYLAR ECHU 1C 103JX5 BC49 4030017620 S.CERAMIC ECJ0EC1H100C BC50 4030017380 S.CERAMIC ECJ0EC1H050B BC52 4030017460 S.CERAMIC ECJ0EB1E102K BC53 4030017460 S.CERAMIC ECJ0EB1E102K BC54 4030017460 S.CERAMIC ECJ0EB1E102K TC55 4030017460 S.CERAMIC ECJ0EB1E102K TC56 4030017460 S.CERAMIC ECJ0EB1E102K TC57 4030017460 S.CERAMIC ECJ0EB1E102K TC58 4030016930 S.CERAMIC ECJ0EB1A104K BC59 4030016790 S.CERAMIC ECJ0EB1C103K BC60 4030016790 S.CERAMIC ECJ0EB1C103K BC61 4030016930 S.CERAMIC ECJ0EB1A104K BC62 4030016930 S.CERAMIC ECJ0EB1A104K BC63 4030017460 S.CERAMIC ECJ0EB1E102K BC64 4550007040 S.TANTALUM ECST0JZ106R BC65 4550007040 S.TANTALUM ECST0JZ106R BC66 4550007040 S.TANTALUM ECST0JZ106R BC67 4550007040 S.TANTALUM ECST0JZ106R BC68 4030017460 S.CERAMIC ECJ0EB1E102K

[EUR], [UK], [USA], [CAN] only B

J1 6910015520 CONNECTOR IMSA-9230B-1-07Z064-T BJ2 6910015510 CONNECTOR IMSA-9230B-1-08Z064-T B

EP1 0910058174 PCB B 6081D

IC1 1130011670 S.IC MB15E03SLPFV1-G-BND-ER B

Q1 1530003610 S.TRANSISTOR FH102-TL TQ3 1530003590 S.TRANSISTOR 2SC5277D2-TL TQ4 1530003630 S.TRANSISTOR 2SC4617 TLS T

D1 1750000740 S.VARICAP 1SV314 (TPH3) T

L1 6200009070 S.COIL LQW18AN18NG00D (LQW1608A18NG00) TL2 6200005720 S.COIL ELJRE 33NG-F TL3 6200005700 S.COIL ELJRE 22NG-F TL4 6200009350 S.COIL ELJRE R22G-F3 T

R1 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR2 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR3 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR4 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR9 7030005580 S.RESISTOR ERJ2GEJ 560 X (56 Ω) BR10 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR11 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR12 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR13 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR14 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR15 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) BR16 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) T

S.=Surface mount

R17 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) TR18 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR19 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR21 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR22 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) B

C1 4550006910 S.TANTALUM TEESVP 1C 334M8R TC2 4030017390 S.CERAMIC ECJ0EC1H180J TC3 4030017640 S.CERAMIC ECJ0EC1H150J TC4 4030017620 S.CERAMIC ECJ0EC1H100C TC5 4030017630 S.CERAMIC ECJ0EC1H120J TC6 4030017460 S.CERAMIC ECJ0EB1E102K TC7 4030017570 S.CERAMIC ECJ0EC1H040B TC8 4030017340 S.CERAMIC ECJ0EC1H010B TC9 4030017380 S.CERAMIC ECJ0EC1H050B TC10 4030017380 S.CERAMIC ECJ0EC1H050B TC16 4030017730 S.CERAMIC ECJ0EB1E471K BC17 4030017380 S.CERAMIC ECJ0EC1H050B BC18 4030017420 S.CERAMIC ECJ0EC1H470J BC19 4030017420 S.CERAMIC ECJ0EC1H470J BC20 4030017420 S.CERAMIC ECJ0EC1H470J BC21 4550007150 S.TANTALUM ECST0JZ475R BC22 4030016790 S.CERAMIC ECJ0EB1C103K TC23 4030016790 S.CERAMIC ECJ0EB1C103K TC24 4030016790 S.CERAMIC ECJ0EB1C103K TC25 4030017460 S.CERAMIC ECJ0EB1E102K BC26 4030016930 S.CERAMIC ECJ0EB1A104K BC27 4030017460 S.CERAMIC ECJ0EB1E102K BC30 4030017460 S.CERAMIC ECJ0EB1E102K TC31 4030017460 S.CERAMIC ECJ0EB1E102K TC32 4550007040 S.TANTALUM ECST0JZ106R TC33 4030017350 S.CERAMIC ECJ0EC1H020B T

J1 6910010840 CONNECTOR IMSA-9230B-1-05Z057-T TJ2 6910014430 CONNECTOR IMSA-9230B-1-06Z057-T T

EP1 0910058183 PCB B 6082C

IC1 1130011670 S.IC MB15E03SLPFV1-G-BND-ER B

Q1 1530003610 S.TRANSISTOR FH102-TL TQ3 1530003590 S.TRANSISTOR 2SC5277D2-TL TQ4 1530003630 S.TRANSISTOR 2SC4617 TLS T

D1 1750000710 S.VARICAP HVC350BTRF T

L1 6200010850 S.COIL LQW18AN22NG00D (LQW1608A22NG00) TL2 6200005740 S.COIL ELJRE 47NG-F TL3 6200005700 S.COIL ELJRE 22NG-F TL4 6200009350 S.COIL ELJRE R22G-F3 T

R1 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR2 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR3 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR4 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR9 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR10 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR11 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR12 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR13 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR14 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR15 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) BR16 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR17 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) TR18 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) T

6 - 3

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

REF ORDER DESCRIPTION M.NO. NO.

[2NDCVCO BOARD] REF ORDER DESCRIPTION M.NO. NO.

[2NDDVCO BOARD]

Page 33: ICOM IC R20 Service Manual

[DOWNCONV BOARD][2NDDVCO BOARD]

R19 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR21 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR22 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) B

C1 4550006910 S.TANTALUM TEESVP 1C 334M8R TC2 4030017500 S.CERAMIC ECJ0EC1H560J TC3 4030017400 S.CERAMIC ECJ0EC1H220J TC4 4030017630 S.CERAMIC ECJ0EC1H120J TC5 4030017650 S.CERAMIC ECJ0EC1H270J TC6 4030017460 S.CERAMIC ECJ0EB1E102K TC7 4030017620 S.CERAMIC ECJ0EC1H100C TC8 4030017570 S.CERAMIC ECJ0EC1H040B TC9 4030017600 S.CERAMIC ECJ0EC1H080C TC10 4030017600 S.CERAMIC ECJ0EC1H080C TC16 4030017730 S.CERAMIC ECJ0EB1E471K BC17 4030017380 S.CERAMIC ECJ0EC1H050B BC18 4030017420 S.CERAMIC ECJ0EC1H470J BC19 4030017420 S.CERAMIC ECJ0EC1H470J BC20 4030017420 S.CERAMIC ECJ0EC1H470J BC21 4550007150 S.TANTALUM ECST0JZ475R BC22 4030016790 S.CERAMIC ECJ0EB1C103K TC23 4030016790 S.CERAMIC ECJ0EB1C103K TC24 4030016790 S.CERAMIC ECJ0EB1C103K TC25 4030017460 S.CERAMIC ECJ0EB1E102K BC26 4030016930 S.CERAMIC ECJ0EB1A104K BC27 4030017460 S.CERAMIC ECJ0EB1E102K BC30 4030017460 S.CERAMIC ECJ0EB1E102K TC31 4030017460 S.CERAMIC ECJ0EB1E102K TC32 4550007040 S.TANTALUM ECST0JZ106R T

J1 6910010840 CONNECTOR IMSA-9230B-1-05Z057-T TJ2 6910014430 CONNECTOR IMSA-9230B-1-06Z057-T T

EP1 0910058193 PCB B 6083C

IC2 1110005120 S.IC µPC2749TB-E3 TIC3 1110005230 S.IC µPC2757TB-E3 TIC4 1130011670 S.IC MB15E03SLPFV1-G-BND-ER B

Q1 1530003260 S.TRANSISTOR 2SC5006-T1 TQ2 1530003260 S.TRANSISTOR 2SC5006-T1 BQ3 1590003380 S.TRANSISTOR UNR9111J-(TX) BQ4 1530003780 S.TRANSISTOR 2SC5624VH-TL TQ5 1590001810 S.TRANSISTOR XP1113 (TX) BQ6 1530003590 S.TRANSISTOR 2SC5277D2-TL B

D1 1790001620 S.DIODE 1SV308 (TPL3) TD2 1790001620 S.DIODE 1SV308 (TPL3) BD3 1720000400 S.VARICAP 1SV245 (TPH3) TD5 1790001620 S.DIODE 1SV308 (TPL3) TD6 1790001620 S.DIODE 1SV308 (TPL3) TD7 1790001620 S.DIODE 1SV308 (TPL3) TD8 1790001620 S.DIODE 1SV308 (TPL3) T

L1 6200005650 S.COIL ELJRE 8N2Z-F TL2 6200005650 S.COIL ELJRE 8N2Z-F TL3 6200004480 S.COIL MLF1608D R82K-T TL4 6200010020 S.COIL C2012C-12NG TL6 6200009350 S.COIL ELJRE R22G-F3 TL7 6200006770 S.COIL ELJRE 1N5Z-F TL8 6200005640 S.COIL ELJRE 6N8Z-F TL9 6200005610 S.COIL ELJRE 3N9Z-F TL10 6200005580 S.COIL ELJRE 2N2Z-F TL11 6200005640 S.COIL ELJRE 6N8Z-F B

S.=Surface mount

R1 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) except [EUR], [UK] T

7030009160 S.RESISTOR ERJ2GEJ 181 X (180 Ω) [EUR], [UK] TR2 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) TR3 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR4 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR5 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR6 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR7 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR8 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR9 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR10 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR11 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) TR12 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) TR13 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) TR14 7030005720 S.RESISTOR ERJ2GEJ 563 X (56 kΩ) BR15 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) BR16 7030007270 S.RESISTOR ERJ2GEJ 151 X (150 Ω) BR17 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR18 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) BR19 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) BR20 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR21 7030005600 S.RESISTOR ERJ2GEJ 273 X (27 kΩ) TR22 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR23 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR25 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR26 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR27 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR28 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) TR29 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR30 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR31 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR32 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR33 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) T

C1 4030017620 S.CERAMIC ECJ0EC1H100C TC2 4030017600 S.CERAMIC ECJ0EC1H080C TC3 4030017580 S.CERAMIC ECJ0EC1H060C TC4 4030017600 S.CERAMIC ECJ0EC1H080C TC5 4030017730 S.CERAMIC ECJ0EB1E471K TC6 4030017730 S.CERAMIC ECJ0EB1E471K TC7 4030017340 S.CERAMIC ECJ0EC1H010B TC8 4030017350 S.CERAMIC ECJ0EC1H020B TC9 4030017350 S.CERAMIC ECJ0EC1H020B TC10 4030017340 S.CERAMIC ECJ0EC1H010B TC11 4030017460 S.CERAMIC ECJ0EB1E102K TC12 4550007040 S.TANTALUM ECST0JZ106R TC13 4030017400 S.CERAMIC ECJ0EC1H220J TC14 4030016930 S.CERAMIC ECJ0EB1A104K BC15 4030017730 S.CERAMIC ECJ0EB1E471K BC16 4030017730 S.CERAMIC ECJ0EB1E471K BC17 4030017730 S.CERAMIC ECJ0EB1E471K BC18 4030017730 S.CERAMIC ECJ0EB1E471K BC19 4030017730 S.CERAMIC ECJ0EB1E471K TC21 4030017730 S.CERAMIC ECJ0EB1E471K BC22 4550006910 S.TANTALUM TEESVP 1C 334M8R TC23 4550007070 S.TANTALUM TEESVP 1A 475M8R BC26 4030016930 S.CERAMIC ECJ0EB1A104K BC27 4030017620 S.CERAMIC ECJ0EC1H100C TC28 4030017340 S.CERAMIC ECJ0EC1H010B TC29 4030017340 S.CERAMIC ECJ0EC1H010B TC30 4030017350 S.CERAMIC ECJ0EC1H020B TC31 4030017630 S.CERAMIC ECJ0EC1H120J TC32 4030017400 S.CERAMIC ECJ0EC1H220J TC34 4030017730 S.CERAMIC ECJ0EB1E471K TC35 4030017730 S.CERAMIC ECJ0EB1E471K TC36 4030017350 S.CERAMIC ECJ0EC1H020B TC37 4030017730 S.CERAMIC ECJ0EB1E471K TC38 4030017730 S.CERAMIC ECJ0EB1E471K TC39 4030017340 S.CERAMIC ECJ0EC1H010B TC40 4030017570 S.CERAMIC ECJ0EC1H040B TC41 4030017640 S.CERAMIC ECJ0EC1H150J TC42 4030017630 S.CERAMIC ECJ0EC1H120J TC43 4030017730 S.CERAMIC ECJ0EB1E471K TC44 4030017730 S.CERAMIC ECJ0EB1E471K BC45 4030017360 S.CERAMIC ECJ0EC1H030B BC46 4030017360 S.CERAMIC ECJ0EC1H030B BC47 4030016790 S.CERAMIC ECJ0EB1C103K BC48 4030016790 S.CERAMIC ECJ0EB1C103K BC49 4030016790 S.CERAMIC ECJ0EB1C103K B

6 - 4

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

REF ORDER DESCRIPTION M.NO. NO.

[DOWNCONV BOARD]

Page 34: ICOM IC R20 Service Manual

[REC UNIT][DOWNCONV BOARD]

C50 4030017730 S.CERAMIC ECJ0EB1E471K BC51 4030017730 S.CERAMIC ECJ0EB1E471K BC52 4030017730 S.CERAMIC ECJ0EB1E471K BC53 4030016790 S.CERAMIC ECJ0EB1C103K BC54 4030017420 S.CERAMIC ECJ0EC1H470J BC55 4030017420 S.CERAMIC ECJ0EC1H470J BC56 4030017420 S.CERAMIC ECJ0EC1H470J TC58 4030016930 S.CERAMIC ECJ0EB1A104K T

J1 6910015510 CONNECTOR IMSA-9230B-1-08Z064-T TJ2 6910015530 CONNECTOR IMSA-9230B-1-06Z064-T T

EP1 0910058152 PCB B 6079B

IC1 1130011980 S.IC BD5228G-TR TIC2 1140012090 S.IC M30622M6P-131GP (RX-2699A ALL) BIC3 1130011680 S.IC FT245BM TIC4 1130012250 S.IC SN74AHC1G02DCKR BIC5 1130012260 S.IC SN74AHC1G32DCKR BIC6 1130011970 S.IC K9F5608UOC-YCBO <NXT> BIC7 1190001950 S.IC ML2302TB TIC8 1130011800 S.IC SN74AHC1G66HDBVR TIC9 1130011800 S.IC SN74AHC1G66HDBVR TIC10 1180002370 S.REG R1111N321B-TR T

Q1 1590003300 S.TRANSISTOR UNR921NJ-(TX) BQ2 1590003510 S.TRANSISTOR UNR9119J-(TX) B

X1 6050010940 S.XTAL CR-672 (6.000 MHz) TX2 6050011240 S.XTAL CR-708 (16.384 MHz) T

R1 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR6 7030009530 S.RESISTOR ERJ2GEJ 270 X (27 Ω) TR7 7030009530 S.RESISTOR ERJ2GEJ 270 X (27 Ω) TR8 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR9 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR10 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR11 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) TR12 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) BR13 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) TR15 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR16 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) TR17 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) TR18 7030005230 S.RESISTOR ERJ2GEJ 334 X (330 kΩ) TR19 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR20 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR21 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR22 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T

C1 4030016790 S.CERAMIC ECJ0EB1C103K TC2 4550006050 S.TANTALUM TEESVA 0J 106M8L TC3 4030016790 S.CERAMIC ECJ0EB1C103K TC4 4030016790 S.CERAMIC ECJ0EB1C103K TC5 4030016790 S.CERAMIC ECJ0EB1C103K TC6 4030017660 S.CERAMIC ECJ0EC1H330J BC7 4030017660 S.CERAMIC ECJ0EC1H330J BC8 4030017330 S.CERAMIC ECJ0EF1C104Z TC9 4030017040 S.CERAMIC ECJ0EB1A333K TC10 4030017330 S.CERAMIC ECJ0EF1C104Z BC11 4030016790 S.CERAMIC ECJ0EB1C103K BC12 4030016790 S.CERAMIC ECJ0EB1C103K BC13 4030016790 S.CERAMIC ECJ0EB1C103K BC14 4030016790 S.CERAMIC ECJ0EB1C103K BC15 4030016790 S.CERAMIC ECJ0EB1C103K BC16 4030016790 S.CERAMIC ECJ0EB1C103K TC17 4030017390 S.CERAMIC ECJ0EC1H180J T

S.=Surface mount

C18 4030016790 S.CERAMIC ECJ0EB1C103K TC19 4030016790 S.CERAMIC ECJ0EB1C103K TC20 4030017400 S.CERAMIC ECJ0EC1H220J TC21 4030017400 S.CERAMIC ECJ0EC1H220J TC22 4030016790 S.CERAMIC ECJ0EB1C103K TC23 4030017490 S.CERAMIC C1608 JB 1A 105K-T TC24 4030017490 S.CERAMIC C1608 JB 1A 105K-T TC25 4030016790 S.CERAMIC ECJ0EB1C103K TC26 4030016790 S.CERAMIC ECJ0EB1C103K TC27 4550007130 S.TANTALUM ECST0GX107R BC28 4030016790 S.CERAMIC ECJ0EB1C103K B

J2 6510024170 S.CONNECTOR CSS5005-0401GSZ TJ6 6910006590 CONNECTOR IMSA-9230B-1-04Z030-T TJ7 6910006520 CONNECTOR IMSA-9230B-1-06Z030-T T

S1 2230001070 S.SWITCH JPM1990-2711R TS2 2230001070 S.SWITCH JPM1990-2711R TS3 2230001070 S.SWITCH JPM1990-2711R T

EP1 6910012350 S.BEAD MMZ1608Y 102BT TEP2 0910058204 PCB B 6084D EP3 6910012350 S.BEAD MMZ1608Y 102BT TEP4 6910012350 S.BEAD MMZ1608Y 102BT T

IC1 1130011140 S.IC CAT24WC256K1.8 BIC2 1130011980 S.IC BD5228G-TR BIC3 1140012110 S.IC M30620MCP-130GP (RX-2699C USA)

[USA] B1140012100 S.IC M30620MCP-129GP (RX-2699B J/E)

except [USA] BIC4 1130007110 S.IC TC7W04FU (TE12L) BIC5 1190000710 S.IC TA31056F (EL) BIC6 1130011870 S.IC SN74AHC1GU04DBVR BIC7 1130011860 S.IC SM6451BT-G-E2 BIC8 1180002370 S.REG R1111N321B-TR BIC9 1180002370 S.REG R1111N321B-TR BIC11 1130007110 S.IC TC7W04FU (TE12L) BIC12 1110006380 S.IC LM2904PWR BIC13 1110006380 S.IC LM2904PWR BIC14 1130006550 S.IC TC7S08FU (TE85R) BIC15 1130006550 S.IC TC7S08FU (TE85R) B

Q1 1530003630 S.TRANSISTOR 2SC4617 TLS TQ3 1510000770 S.TRANSISTOR 2SA1586-GR (TE85R) BQ4 1530003630 S.TRANSISTOR 2SC4617 TLS TQ5 1530003630 S.TRANSISTOR 2SC4617 TLS BQ6 1530002690 S.TRANSISTOR 2SC4116-GR (TE85R) BQ7 1590001170 S.TRANSISTOR XP1501-(TX) .AB BQ8 1510000670 S.TRANSISTOR 2SA1588-GR (TE85R) BQ9 1520000460 S.TRANSISTOR 2SB1132 T100 R BQ10 1510000580 S.TRANSISTOR 2SA1362-GR (TE85R) BQ11 1590003230 S.TRANSISTOR UNR9113J-(TX) BQ12 1530003630 S.TRANSISTOR 2SC4617 TLS BQ13 1590001190 S.TRANSISTOR XP6501-(TX) .AB BQ14 1510000670 S.TRANSISTOR 2SA1588-GR (TE85R) BQ15 1510000580 S.TRANSISTOR 2SA1362-GR (TE85R) BQ16 1530003630 S.TRANSISTOR 2SC4617 TLS BQ17 1510000670 S.TRANSISTOR 2SA1588-GR (TE85R) BQ19 1590001390 S.FET 2SJ144-Y (TE85R) BQ20 1590003250 S.TRANSISTOR UNR9115J-(TX) BQ21 1590003250 S.TRANSISTOR UNR9115J-(TX) BQ22 1530003630 S.TRANSISTOR 2SC4617 TLS BQ23 1530003630 S.TRANSISTOR 2SC4617 TLS BQ24 1590001190 S.TRANSISTOR XP6501-(TX) .AB BQ25 1590001190 S.TRANSISTOR XP6501-(TX) .AB BQ26 1590001390 S.FET 2SJ144-Y (TE85R) BQ27 1590001390 S.FET 2SJ144-Y (TE85R) B

6 - 5

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

REF ORDER DESCRIPTION M.NO. NO.

[REC UNIT]

REF ORDER DESCRIPTION M.NO. NO.

[LOGIC UNIT]

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Q28 1530003630 S.TRANSISTOR 2SC4617 TLS BQ29 1590003290 S.TRANSISTOR UNR9213J-(TX) BQ30 1520000650 S.TRANSISTOR 2SB1201-S-TL TQ31 1590002950 S.FET HAT1023R-EL TQ32 1530003630 S.TRANSISTOR 2SC4617 TLS TQ33 1520000460 S.TRANSISTOR 2SB1132 T100 R TQ34 1590003390 S.TRANSISTOR UNR9215J-(TX) TQ35 1590003290 S.TRANSISTOR UNR9213J-(TX) TQ36 1530003630 S.TRANSISTOR 2SC4617 TLS TQ37 1510000670 S.TRANSISTOR 2SA1588-GR (TE85R) BQ38 1590001650 S.TRANSISTOR XP4601 (TX) B

D2 1790001240 S.DIODE MA2S728-(TX) [SEA], [EXP-01], [EXP-02], [CAN] only B

D3 1750000940 S.DIODE ISS400 TE61 TD5 1790001240 S.DIODE MA2S728-(TX) [USA] only BD6 1750000940 S.DIODE ISS400 TE61 TD8 1790001240 S.DIODE MA2S728-(TX) [UK], [USA] only BD9 1750000940 S.DIODE ISS400 TE61 TD11 1790001240 S.DIODE MA2S728-(TX) [EUR] only BD12 1750000940 S.DIODE ISS400 TE61 TD13 1750000940 S.DIODE ISS400 TE61 BD14 1750000770 S.VARICAP HVC376BTRF BD18 1720000600 S.VARICAP HN2V02H-B (TE12R) BD20 1750000940 S.DIODE ISS400 TE61 BD21 1750000940 S.DIODE ISS400 TE61 BD22 1790001560 S.DIODE 1SS372 (TE85R) BD23 1790001560 S.DIODE 1SS372 (TE85R) BD24 1790001560 S.DIODE 1SS372 (TE85R) BD25 1790001560 S.DIODE 1SS372 (TE85R) BD26 1750000940 S.DIODE ISS400 TE61 TD27 1750000940 S.DIODE ISS400 TE61 TD28 1790001250 S.DIODE MA2S111-(TX) TD29 1790000670 S.DIODE SB07-03C-TB TD30 1750000940 S.DIODE ISS400 TE61 TD31 1750000940 S.DIODE ISS400 TE61 TD32 1790001250 S.DIODE MA2S111-(TX) BD33 1730002510 S.ZENER MA8027-H (TX) BD34 1790000670 S.DIODE SB07-03C-TB TD35 1790001240 S.DIODE MA2S728-(TX) TD36 1790000860 S.DIODE MA133 (TX) T

X1 6050011310 S.XTAL CR-717 (9.8304 MHz) BX2 6060000820 S.CERAMIC CSBFB453KJ58-R1 B

L1 6200003640 S.COIL MLF1608E 100K-T B

R1 7410001110 S.ARRAY EXB28V332JX BR2 7410001220 S.ARRAY EXB28V103JX BR3 7410001220 S.ARRAY EXB28V103JX BR4 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR5 7410001220 S.ARRAY EXB28V103JX BR6 7410001220 S.ARRAY EXB28V103JX BR7 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR8 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR9 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR10 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR11 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR12 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR13 7030005310 S.RESISTOR ERJ2GEJ 124 X (120 kΩ) BR14 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR15 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR17 7410001220 S.ARRAY EXB28V103JX BR18 7410001220 S.ARRAY EXB28V103JX BR19 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR20 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR21 7410001110 S.ARRAY EXB28V332JX BR22 7030010040 S.RESISTOR ERJ2GE-JPW BR23 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR24 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR25 7410001110 S.ARRAY EXB28V332JX BR26 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR27 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR28 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR29 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR30 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR31 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) B

S.=Surface mount

R32 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR33 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR34 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR35 7410001130 S.ARRAY EXB28V102JX BR36 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR38 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR39 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR40 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR41 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) BR42 7410001130 S.ARRAY EXB28V102JX BR43 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR45 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR47 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR49 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR51 7410001130 S.ARRAY EXB28V102JX BR52 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR53 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR54 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR55 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR56 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR57 7030010040 S.RESISTOR ERJ2GE-JPW BR58 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR59 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR60 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR61 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR62 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR63 7410001220 S.ARRAY EXB28V103JX BR64 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) BR66 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR67 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR68 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR69 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR70 7030010040 S.RESISTOR ERJ2GE-JPW BR71 7030010040 S.RESISTOR ERJ2GE-JPW BR72 7030010040 S.RESISTOR ERJ2GE-JPW BR73 7030010040 S.RESISTOR ERJ2GE-JPW BR74 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR76 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR77 7410001130 S.ARRAY EXB28V102JX BR82 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR83 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR84 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR85 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR86 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR87 7030007350 S.RESISTOR ERJ2GEJ 393 X (39 kΩ) BR88 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR89 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR90 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR91 7030009290 S.RESISTOR ERJ2GEJ 562 X (5.6 kΩ) BR93 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR94 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR95 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR96 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR97 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR98 7030005060 S.RESISTOR ERJ2GEJ 333 X (33 kΩ) BR99 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR100 7030010040 S.RESISTOR ERJ2GE-JPW BR101 7030009290 S.RESISTOR ERJ2GEJ 562 X (5.6 kΩ) BR103 7030005060 S.RESISTOR ERJ2GEJ 333 X (33 kΩ) BR104 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR105 7030005290 S.RESISTOR ERJ2GEJ 682 X (6.8 kΩ) BR106 7030010040 S.RESISTOR ERJ2GE-JPW BR107 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR108 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR110 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR111 7030010040 S.RESISTOR ERJ2GE-JPW BR112 7030005310 S.RESISTOR ERJ2GEJ 124 X (120 kΩ) BR113 7030005310 S.RESISTOR ERJ2GEJ 124 X (120 kΩ) BR114 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR115 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) BR116 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) BR117 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR118 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR119 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) BR120 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) BR121 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR122 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR123 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) BR124 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR125 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR126 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) B

6 - 6

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

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R127 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR128 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR129 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR130 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR131 7030009150 S.RESISTOR ERJ2GEJ 824 X (820 kΩ) BR132 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR133 7030009150 S.RESISTOR ERJ2GEJ 824 X (820 kΩ) BR134 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR135 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR136 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR137 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR139 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR140 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR141 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR142 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR143 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR144 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR145 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR146 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR147 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR148 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR149 7030007350 S.RESISTOR ERJ2GEJ 393 X (39 kΩ) BR150 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR151 7030007350 S.RESISTOR ERJ2GEJ 393 X (39 kΩ) BR152 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR153 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR154 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR155 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR156 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR157 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR158 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR159 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR160 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR161 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR162 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) BR163 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR164 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR165 7030007350 S.RESISTOR ERJ2GEJ 393 X (39 kΩ) BR166 7030007350 S.RESISTOR ERJ2GEJ 393 X (39 kΩ) BR167 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR168 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR169 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR170 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR172 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) BR174 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR175 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR176 7030006610 S.RESISTOR ERJ2GEJ 394 X (390 kΩ) BR177 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR178 7030006610 S.RESISTOR ERJ2GEJ 394 X (390 kΩ) BR179 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) BR180 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR181 7030005590 S.RESISTOR ERJ2GEJ 680 X (68 Ω) TR182 7030007570 S.RESISTOR ERJ2GEJ 122 X (1.2 kΩ) TR183 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR184 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR185 7030003210 S.RESISTOR ERJ3GEYJ 120 V (12 Ω) TR186 7030003210 S.RESISTOR ERJ3GEYJ 120 V (12 Ω) TR187 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR188 7030007270 S.RESISTOR ERJ2GEJ 151 X (150 Ω) TR189 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR190 7510001470 S.THERMISTOR NTCG20 4AG 473JT BR191 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR192 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) TR193 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR194 7030005871 S.RESISTOR ERA3YKD 104V (100 kΩ) TR195 7030008051 S.RESISTOR ERA3YKD 184V (180 kΩ) TR196 7030000120 S.RESISTOR MCR10EZHJ 6.8 Ω (6R8) TR197 7030000120 S.RESISTOR MCR10EZHJ 6.8 Ω (6R8) TR198 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR199 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR200 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) BR201 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR202 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR203 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) BR204 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) BR205 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) BR206 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) BR207 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR208 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR209 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR210 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B

S.=Surface mount

R211 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) BR212 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) BR213 7030010040 S.RESISTOR ERJ2GE-JPW BR214 7030010040 S.RESISTOR ERJ2GE-JPW BR215 7030010040 S.RESISTOR ERJ2GE-JPW BR216 7030010040 S.RESISTOR ERJ2GE-JPW BR217 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B

C1 4030016930 S.CERAMIC ECJ0EB1A104K BC2 4030017460 S.CERAMIC ECJ0EB1E102K BC3 4030017460 S.CERAMIC ECJ0EB1E102K BC4 4030017460 S.CERAMIC ECJ0EB1E102K BC5 4030017460 S.CERAMIC ECJ0EB1E102K BC6 4030017460 S.CERAMIC ECJ0EB1E102K BC7 4030016790 S.CERAMIC ECJ0EB1C103K BC8 4030017460 S.CERAMIC ECJ0EB1E102K BC9 4030017460 S.CERAMIC ECJ0EB1E102K BC10 4030017460 S.CERAMIC ECJ0EB1E102K BC11 4030017460 S.CERAMIC ECJ0EB1E102K BC12 4030017460 S.CERAMIC ECJ0EB1E102K BC13 4030016930 S.CERAMIC ECJ0EB1A104K BC14 4030017460 S.CERAMIC ECJ0EB1E102K BC16 4030017460 S.CERAMIC ECJ0EB1E102K BC18 4030017420 S.CERAMIC ECJ0EC1H470J TC19 4030017420 S.CERAMIC ECJ0EC1H470J TC20 4030017420 S.CERAMIC ECJ0EC1H470J TC21 4030017420 S.CERAMIC ECJ0EC1H470J TC22 4030017640 S.CERAMIC ECJ0EC1H150J BC23 4030016930 S.CERAMIC ECJ0EB1A104K BC24 4030017460 S.CERAMIC ECJ0EB1E102K BC26 4030017460 S.CERAMIC ECJ0EB1E102K BC27 4030016790 S.CERAMIC ECJ0EB1C103K BC28 4030017730 S.CERAMIC ECJ0EB1E471K BC29 4030016930 S.CERAMIC ECJ0EB1A104K TC30 4030018870 S.CERAMIC ECJ0EF0J105Z BC31 4550006140 S.TANTALUM ECST1EY474R BC33 4030017460 S.CERAMIC ECJ0EB1E102K TC34 4550006550 S.TANTALUM TEESVD 0G 227M12R BC35 4030018870 S.CERAMIC ECJ0EF0J105Z BC36 4030017680 S.CERAMIC ECJ0EC1H820J TC37 4030017420 S.CERAMIC ECJ0EC1H470J BC38 4550006340 S.TANTALUM ECST1AY335R BC39 4030016930 S.CERAMIC ECJ0EB1A104K BC40 4510007970 S.ELECTROLYTIC ECEV1AA330WR BC41 4030016930 S.CERAMIC ECJ0EB1A104K BC42 4030017430 S.CERAMIC ECJ0EC1H101J BC43 4550006320 S.TANTALUM ECST0JY475R BC44 4550006320 S.TANTALUM ECST0JY475R BC45 4030016930 S.CERAMIC ECJ0EB1A104K BC46 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC47 4030016930 S.CERAMIC ECJ0EB1A104K BC48 4030017460 S.CERAMIC ECJ0EB1E102K BC49 4030016930 S.CERAMIC ECJ0EB1A104K BC50 4030016930 S.CERAMIC ECJ0EB1A104K BC51 4030017460 S.CERAMIC ECJ0EB1E102K BC52 4030017460 S.CERAMIC ECJ0EB1E102K BC53 4030016790 S.CERAMIC ECJ0EB1C103K BC54 4030016930 S.CERAMIC ECJ0EB1A104K BC55 4030017460 S.CERAMIC ECJ0EB1E102K BC56 4030016790 S.CERAMIC ECJ0EB1C103K BC57 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC58 4030016930 S.CERAMIC ECJ0EB1A104K BC59 4030017460 S.CERAMIC ECJ0EB1E102K BC60 4030016930 S.CERAMIC ECJ0EB1A104K BC61 4030017460 S.CERAMIC ECJ0EB1E102K BC62 4550006320 S.TANTALUM ECST0JY475R BC63 4030017460 S.CERAMIC ECJ0EB1E102K BC64 4030017460 S.CERAMIC ECJ0EB1E102K BC65 4030016790 S.CERAMIC ECJ0EB1C103K BC66 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC67 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC68 4030017460 S.CERAMIC ECJ0EB1E102K BC69 4030017460 S.CERAMIC ECJ0EB1E102K BC70 4550006700 S.TANTALUM ECST1AY106R BC71 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC72 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC73 4030016790 S.CERAMIC ECJ0EB1C103K BC74 4030017730 S.CERAMIC ECJ0EB1E471K BC75 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC76 4030017490 S.CERAMIC C1608 JB 1A 105K-T B

6 - 7

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 37: ICOM IC R20 Service Manual

[LOGIC UNIT][LOGIC UNIT]

C77 4030017460 S.CERAMIC ECJ0EB1E102K BC78 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC79 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC80 4550006700 S.TANTALUM ECST1AY106R BC81 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC82 4550006620 S.TANTALUM ECST0JY226R BC83 4550006620 S.TANTALUM ECST0JY226R BC84 4030017780 S.CERAMIC ECJ0EB1E472K BC85 4030016930 S.CERAMIC ECJ0EB1A104K BC86 4030016930 S.CERAMIC ECJ0EB1A104K BC87 4030017460 S.CERAMIC ECJ0EB1E102K BC88 4030017460 S.CERAMIC ECJ0EB1E102K BC89 4030017460 S.CERAMIC ECJ0EB1E102K BC90 4550006540 S.TANTALUM ECST1CY475R BC91 4030017460 S.CERAMIC ECJ0EB1E102K BC92 4030017760 S.CERAMIC ECJ0EB1H222K BC93 4030017460 S.CERAMIC ECJ0EB1E102K BC94 4030017760 S.CERAMIC ECJ0EB1H222K BC95 4030016930 S.CERAMIC ECJ0EB1A104K BC96 4030016930 S.CERAMIC ECJ0EB1A104K BC97 4030016930 S.CERAMIC ECJ0EB1A104K BC98 4550006540 S.TANTALUM ECST1CY475R BC99 4030016970 S.CERAMIC ECJ0EB1C223K BC100 4030016970 S.CERAMIC ECJ0EB1C223K BC101 4030016930 S.CERAMIC ECJ0EB1A104K BC102 4030016930 S.CERAMIC ECJ0EB1A104K BC103 4030016930 S.CERAMIC ECJ0EB1A104K BC104 4030016930 S.CERAMIC ECJ0EB1A104K BC105 4550006540 S.TANTALUM ECST1CY475R BC106 4510008040 S.ELECTROLYTIC EEFCD 0K 330R BC107 4550006210 S.TANTALUM ECST1CX106R BC108 4030016930 S.CERAMIC ECJ0EB1A104K BC109 4030016930 S.CERAMIC ECJ0EB1A104K BC110 4030016930 S.CERAMIC ECJ0EB1A104K BC111 4030016930 S.CERAMIC ECJ0EB1A104K BC112 4030016930 S.CERAMIC ECJ0EB1A104K BC113 4030016930 S.CERAMIC ECJ0EB1A104K BC114 4030017460 S.CERAMIC ECJ0EB1E102K BC115 4030016930 S.CERAMIC ECJ0EB1A104K BC116 4030016930 S.CERAMIC ECJ0EB1A104K BC117 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC118 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC119 4030016930 S.CERAMIC ECJ0EB1A104K BC120 4030016930 S.CERAMIC ECJ0EB1A104K BC122 4030016930 S.CERAMIC ECJ0EB1A104K BC123 4030016930 S.CERAMIC ECJ0EB1A104K BC124 4030016930 S.CERAMIC ECJ0EB1A104K BC125 4030016930 S.CERAMIC ECJ0EB1A104K BC126 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC127 4030017730 S.CERAMIC ECJ0EB1E471K BC128 4030017730 S.CERAMIC ECJ0EB1E471K BC131 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC132 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC133 4030017740 S.CERAMIC ECJ0EB1E821K BC134 4030017740 S.CERAMIC ECJ0EB1E821K BC135 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC136 4030017450 S.CERAMIC ECJ0EB1E271K BC137 4030017450 S.CERAMIC ECJ0EB1E271K BC138 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC139 4030017460 S.CERAMIC ECJ0EB1E102K BC140 4030017430 S.CERAMIC ECJ0EC1H101J BC141 4030017460 S.CERAMIC ECJ0EB1E102K BC142 4030017430 S.CERAMIC ECJ0EC1H101J BC143 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC144 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC145 4030016780 S.CERAMIC ECJ0EB1C153K BC146 4030016780 S.CERAMIC ECJ0EB1C153K BC147 4030018100 S.CERAMIC ECJ0EB1H681K BC148 4030018100 S.CERAMIC ECJ0EB1H681K BC149 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC150 4030017460 S.CERAMIC ECJ0EB1E102K BC151 4030017460 S.CERAMIC ECJ0EB1E102K BC152 4030008680 S.CERAMIC C2012 JF 1C 105Z-T BC153 4030016930 S.CERAMIC ECJ0EB1A104K BC154 4030016930 S.CERAMIC ECJ0EB1A104K BC155 4030017730 S.CERAMIC ECJ0EB1E471K BC156 4030016930 S.CERAMIC ECJ0EB1A104K BC157 4030017730 S.CERAMIC ECJ0EB1E471K BC158 4030016930 S.CERAMIC ECJ0EB1A104K BC159 4550006540 S.TANTALUM ECST1CY475R BC160 4030017720 S.CERAMIC ECJ0EB1H331K B

S.=Surface mount

C161 4030017720 S.CERAMIC ECJ0EB1H331K BC162 4030011600 S.CERAMIC C1608 JB 1E 104K-T BC163 4030017720 S.CERAMIC ECJ0EB1H331K BC164 4030017720 S.CERAMIC ECJ0EB1H331K BC165 4030017760 S.CERAMIC ECJ0EB1H222K BC166 4030018080 S.CERAMIC ECJ0EB1H182K BC167 4030017760 S.CERAMIC ECJ0EB1H222K BC168 4030018080 S.CERAMIC ECJ0EB1H182K BC169 4030016790 S.CERAMIC ECJ0EB1C103K BC170 4030016930 S.CERAMIC ECJ0EB1A104K BC171 4030016790 S.CERAMIC ECJ0EB1C103K BC172 4030016930 S.CERAMIC ECJ0EB1A104K BC173 4030017460 S.CERAMIC ECJ0EB1E102K TC174 4030016930 S.CERAMIC ECJ0EB1A104K BC175 4030016930 S.CERAMIC ECJ0EB1A104K TC176 4030016930 S.CERAMIC ECJ0EB1A104K TC177 4030017460 S.CERAMIC ECJ0EB1E102K TC178 4030017460 S.CERAMIC ECJ0EB1E102K TC179 4030017460 S.CERAMIC ECJ0EB1E102K BC180 4030017460 S.CERAMIC ECJ0EB1E102K TC181 4030017460 S.CERAMIC ECJ0EB1E102K BC182 4030017460 S.CERAMIC ECJ0EB1E102K TC183 4030017780 S.CERAMIC ECJ0EB1E472K TC184 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC185 4030017460 S.CERAMIC ECJ0EB1E102K TC186 4030017460 S.CERAMIC ECJ0EB1E102K BC187 4030017460 S.CERAMIC ECJ0EB1E102K BC188 4030017460 S.CERAMIC ECJ0EB1E102K BC189 4030017460 S.CERAMIC ECJ0EB1E102K BC190 4030016930 S.CERAMIC ECJ0EB1A104K BC191 4030016930 S.CERAMIC ECJ0EB1A104K BC192 4030016930 S.CERAMIC ECJ0EB1A104K BC193 4030016930 S.CERAMIC ECJ0EB1A104K BC194 4030017490 S.CERAMIC C1608 JB 1A 105K-T BC196 4030016930 S.CERAMIC ECJ0EB1A104K T

J3 6450002250 CONNECTOR HSJ1456-010320 BJ5 6510022150 S.CONNECTOR AXN340C130P BJ6 6450002130 CONNECTOR 04-730A2-02BKA BJ8 6510021900 S.CONNECTOR BM02B-ASRS-TF TJ9 6510024220 S.CONNECTOR 23FLZ-RSM1-TB B

DS1 5040002930 S.LED SML-512MW T86 TDS2 5040002930 S.LED SML-512MW T86 TDS3 5040002930 S.LED SML-512MW T86 TDS4 5040002930 S.LED SML-512MW T86 TDS5 5040002930 S.LED SML-512MW T86 TDS6 5040002930 S.LED SML-512MW T86 TDS7 5040002930 S.LED SML-512MW T86 TDS8 5040002930 S.LED SML-512MW T86 TDS9 5040002930 S.LED SML-512MW T86 TDS11 5040002990 S.LED SML-512UWT86 TDS12 5030002690 LCD M3-0243TIY T

S24 2250000200 ENCODER TP90N00E20-16F-1517 BS25 2250000200 ENCODER TP90N00E20-16F-1517 B

EP1 6910012350 S.BEAD MMZ1608Y 102BT TEP2 6910012350 S.BEAD MMZ1608Y 102BT TEP3 6910012350 S.BEAD MMZ1608Y 102BT TEP4 6910012350 S.BEAD MMZ1608Y 102BT TEP6 6910014680 S.BEAD MMZ1608Y 121BT BEP7 6910013310 S.BEAD MMZ1608D121B TEP8 6910014680 S.BEAD MMZ1608Y 121BT BEP9 6910014690 S.BEAD MPZ1608S221A-T TEP10 6910014690 S.BEAD MPZ1608S221A-T TEP12 6910015960 E.OTHER CV1081 RX2699EP13 6910016220 S.BEAD MZA2010D121C BEP14 0910058133 PCB B 6077C

6 - 8

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 38: ICOM IC R20 Service Manual

[RF UNIT][RF UNIT]

IC1 1110005230 S.IC µPC2757TB-E3 TIC2 1110003200 S.IC TA31136FN (EL) TIC10 1110005230 S.IC µPC2757TB-E3 TIC12 1130011770 S.IC CD4066BPWR BIC14 1110006360 S.IC M62366GP D60J TIC15 1110005230 S.IC µPC2757TB-E3 TIC16 1110005230 S.IC µPC2757TB-E3 TIC17 1110003200 S.IC TA31136FN (EL) TIC18 1110005180 S.IC µPC2746TB-E3 TIC19 1110005180 S.IC µPC2746TB-E3 TIC20 1110006360 S.IC M62366GP D60J TIC21 1130011770 S.IC CD4066BPWR TIC22 1130011760 S.IC CD4094BPWR B

Q1 1590001190 S.TRANSISTOR XP6501-(TX) .AB BQ4 1590001190 S.TRANSISTOR XP6501-(TX) .AB BQ5 1530003260 S.TRANSISTOR 2SC5006-T1 TQ14 1530003260 S.TRANSISTOR 2SC5006-T1 BQ24 1530003810 S.TRANSISTOR 2SC5008-T1 TQ26 1530003780 S.TRANSISTOR 2SC5624VH-TL TQ35 1530003260 S.TRANSISTOR 2SC5006-T1 TQ36 1530003260 S.TRANSISTOR 2SC5006-T1 TQ41 1590003230 S.TRANSISTOR UNR9113J-(TX) TQ44 1590001660 S.TRANSISTOR XP4312 (TX) BQ501 1590003230 S.TRANSISTOR UNR9113J-(TX) BQ502 1590001810 S.TRANSISTOR XP1113 (TX) BQ503 1590001810 S.TRANSISTOR XP1113 (TX) BQ504 1590001680 S.TRANSISTOR XP1110 (TX) BQ505 1530002880 S.TRANSISTOR 2SC4226-T1 R24 BQ506 1590003410 S.TRANSISTOR UNR9110J-(TX) BQ507 1530003810 S.TRANSISTOR 2SC5008-T1 BQ508 1590001660 S.TRANSISTOR XP4312 (TX) BQ509 1590003230 S.TRANSISTOR UNR9113J-(TX) BQ510 1590001540 S.TRANSISTOR UMD6N TR BQ513 1590001650 S.TRANSISTOR XP4601 (TX) BQ519 1590003230 S.TRANSISTOR UNR9113J-(TX) BQ521 1530003630 S.TRANSISTOR 2SC4617 TLS TQ522 1530003630 S.TRANSISTOR 2SC4617 TLS TQ523 1530003630 S.TRANSISTOR 2SC4617 TLS TQ524 1530003630 S.TRANSISTOR 2SC4617 TLS TQ525 1590001190 S.TRANSISTOR XP6501-(TX) .AB TQ526 1590003230 S.TRANSISTOR UNR9113J-(TX) TQ527 1590003230 S.TRANSISTOR UNR9113J-(TX) TQ528 1530003260 S.TRANSISTOR 2SC5006-T1 TQ529 1590003290 S.TRANSISTOR UNR9213J-(TX) BQ530 1530003630 S.TRANSISTOR 2SC4617 TLS TQ531 1530003630 S.TRANSISTOR 2SC4617 TLS TQ532 1560000810 S.FET 2SK1069-4-TL TQ534 1590001810 S.TRANSISTOR XP1113 (TX) BQ535 1590001810 S.TRANSISTOR XP1113 (TX) BQ540 1530003260 S.TRANSISTOR 2SC5006-T1 TQ542 1530003260 S.TRANSISTOR 2SC5006-T1 TQ543 1590003230 S.TRANSISTOR UNR9113J-(TX) TQ544 1590001190 S.TRANSISTOR XP6501-(TX) .AB BQ545 1590001190 S.TRANSISTOR XP6501-(TX) .AB BQ546 1590001660 S.TRANSISTOR XP4312 (TX) BQ547 1590003290 S.TRANSISTOR UNR9213J-(TX) BQ548 1530003260 S.TRANSISTOR 2SC5006-T1 TQ549 1530003260 S.TRANSISTOR 2SC5006-T1 BQ550 1530003610 S.TRANSISTOR FH102-TL BQ551 1590002650 S.TRANSISTOR UPA805T-T1 TQ552 1590003230 S.TRANSISTOR UNR9113J-(TX) TQ553 1590001810 S.TRANSISTOR XP1113 (TX) BQ554 1590001810 S.TRANSISTOR XP1113 (TX) BQ555 1530003260 S.TRANSISTOR 2SC5006-T1 TQ556 1530003630 S.TRANSISTOR 2SC4617 TLS T

D1 1750000710 S.VARICAP HVC350BTRF BD2 1750000710 S.VARICAP HVC350BTRF BD3 1790001620 S.DIODE 1SV308 (TPL3) TD4 1750000710 S.VARICAP HVC350BTRF TD5 1750000710 S.VARICAP HVC350BTRF TD11 1790001620 S.DIODE 1SV308 (TPL3) TD13 1790001620 S.DIODE 1SV308 (TPL3) TD25 1790001620 S.DIODE 1SV308 (TPL3) BD29 1790001620 S.DIODE 1SV308 (TPL3) TD32 1790001620 S.DIODE 1SV308 (TPL3) TD34 1790001620 S.DIODE 1SV308 (TPL3) TD36 1790001620 S.DIODE 1SV308 (TPL3) T

S.=Surface mount

D57 1790001240 S.DIODE MA2S728-(TX) BD58 1790001260 S.DIODE MA2S077-(TX) TD59 1790001260 S.DIODE MA2S077-(TX) TD60 1790001260 S.DIODE MA2S077-(TX) TD61 1790001260 S.DIODE MA2S077-(TX) TD64 1790001620 S.DIODE 1SV308 (TPL3) BD65 1790001620 S.DIODE 1SV308 (TPL3) BD66 1790001620 S.DIODE 1SV308 (TPL3) BD67 1790001620 S.DIODE 1SV308 (TPL3) BD68 1720000240 S.DIODE 1SV172 (TE85R) BD69 1790001620 S.DIODE 1SV308 (TPL3) BD70 1790001620 S.DIODE 1SV308 (TPL3) BD72 1790001620 S.DIODE 1SV308 (TPL3) BD73 1790001620 S.DIODE 1SV308 (TPL3) BD74 1790001620 S.DIODE 1SV308 (TPL3) BD75 1790001620 S.DIODE 1SV308 (TPL3) TD76 1790001260 S.DIODE MA2S077-(TX) BD100 1720000820 S.VARICAP SVC347S/T-TL BD101 1790001260 S.DIODE MA2S077-(TX) TD106 1750000940 S.DIODE ISS400 TE61 BD107 1750000940 S.DIODE ISS400 TE61 BD108 1750000940 S.DIODE ISS400 TE61 TD109 1750000940 S.DIODE ISS400 TE61 TD110 1750000940 S.DIODE ISS400 TE61 TD111 1750000940 S.DIODE ISS400 TE61 TD112 1750000940 S.DIODE ISS400 TE61 TD113 1750000940 S.DIODE ISS400 TE61 TD114 1790001240 S.DIODE MA2S728-(TX) BD115 1790001790 S.DIODE RB876W TL TD116 1790001790 S.DIODE RB876W TL TD117 1160000140 S.DIODE DAP222 TL BD119 1160000140 S.DIODE DAP222 TL BD121 1160000140 S.DIODE DAP222 TL BD130 1790001260 S.DIODE MA2S077-(TX) TD131 1790001260 S.DIODE MA2S077-(TX) TD132 1790001260 S.DIODE MA2S077-(TX) TD133 1790001260 S.DIODE MA2S077-(TX) TD134 1750000940 S.DIODE ISS400 TE61 TD135 1750000940 S.DIODE ISS400 TE61 TD136 1750000940 S.DIODE ISS400 TE61 TD137 1750000940 S.DIODE ISS400 TE61 TD138 1790001240 S.DIODE MA2S728-(TX) BD139 1790001240 S.DIODE MA2S728-(TX) BD141 1750000710 S.VARICAP HVC350BTRF TD142 1750000710 S.VARICAP HVC350BTRF TD143 1790001620 S.DIODE 1SV308 (TPL3) TD145 1750000710 S.VARICAP HVC350BTRF BD146 1750000710 S.VARICAP HVC350BTRF BD147 1790001620 S.DIODE 1SV308 (TPL3) BD148 1790001240 S.DIODE MA2S728-(TX) BD149 1790001240 S.DIODE MA2S728-(TX) BD150 1790001240 S.DIODE MA2S728-(TX) TD151 1790001240 S.DIODE MA2S728-(TX) TD152 1790001240 S.DIODE MA2S728-(TX) BD153 1790001240 S.DIODE MA2S728-(TX) TD154 1790001240 S.DIODE MA2S728-(TX) TD155 1790001240 S.DIODE MA2S728-(TX) TD156 1790001240 S.DIODE MA2S728-(TX) TD157 1790001240 S.DIODE MA2S728-(TX) TD158 1790001240 S.DIODE MA2S728-(TX) TD159 1790001240 S.DIODE MA2S728-(TX) TD160 1790001240 S.DIODE MA2S728-(TX) TD161 1790001240 S.DIODE MA2S728-(TX) BD162 1790001240 S.DIODE MA2S728-(TX) BD163 1790001240 S.DIODE MA2S728-(TX) BD164 1790001240 S.DIODE MA2S728-(TX) BD165 1790001240 S.DIODE MA2S728-(TX) TD166 1790001240 S.DIODE MA2S728-(TX) BD167 1790001240 S.DIODE MA2S728-(TX) TD168 1790001240 S.DIODE MA2S728-(TX) TD169 1790001240 S.DIODE MA2S728-(TX) BD170 1790001240 S.DIODE MA2S728-(TX) BD171 1750000710 S.VARICAP HVC350BTRF TD172 1790001240 S.DIODE MA2S728-(TX) TD173 1750000720 S.VARICAP HVC375BTRF TD174 1750000720 S.VARICAP HVC375BTRF TD175 1750000720 S.VARICAP HVC375BTRF TD176 1750000720 S.VARICAP HVC375BTRF TD178 1750000940 S.DIODE ISS400 TE61 TD179 1750000940 S.DIODE ISS400 TE61 T

6 - 9

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 39: ICOM IC R20 Service Manual

[RF UNIT][RF UNIT]

FI1 2040001200 S.SAW EFCH266MKQP1 TFI2 2020001270 CERAMIC CFWLB450KE2A-B0 (CFWM450E) BFI3 2010002280 S.MONOLITH FL-293 (19.650 MHz) TFI4 2040001190 S.SAW EFCH429MKQP1 TFI6 2020001470 CERAMIC CFWLA450KL6A002-B0 (CFWS450K3) BFI7 2010002280 S.MONOLITH FL-293 (19.650 MHz) TFI8 2020001270 CERAMIC CFWLB450KE2A-B0 (CFWM450E) B

X1 6050010210 S.XTAL CR-593 (19.200 MHz) T

L1 6200005740 S.COIL ELJRE 47NG-F BL3 6200005680 S.COIL ELJRE 15NG-F TL4 6200005700 S.COIL ELJRE 22NG-F TL5 6200005680 S.COIL ELJRE 15NG-F TL9 6200005720 S.COIL ELJRE 33NG-F TL10 6200005700 S.COIL ELJRE 22NG-F TL11 6200005680 S.COIL ELJRE 15NG-F TL12 6200005660 S.COIL ELJRE 10NG-F TL13 6200005630 S.COIL ELJRE 5N6Z-F TL15 6200005740 S.COIL ELJRE 47NG-F TL17 6200007170 S.COIL MLF1608A 3R3K-T TL21 6150004840 S.COIL LS-510 BL28 6200006670 S.COIL ELJRE 68NG-F BL39 6200005730 S.COIL ELJRE 39NG-F TL41 6200006980 S.COIL ELJRE R10G-F TL43 6200006770 S.COIL ELJRE 1N5Z-F TL44 6200005620 S.COIL ELJRE 4N7Z-F TL56 6200005640 S.COIL ELJRE 6N8Z-F TL60 6200008570 S.COIL LQW2BHN6N8D01L (LQN21A 6N8D04) TL61 6200008570 S.COIL LQW2BHN6N8D01L (LQN21A 6N8D04) TL70 6200004720 S.COIL MLF1608D R10K-T BL73 6200006960 S.COIL MLF1608A 2R7K-T TL74 6200005740 S.COIL ELJRE 47NG-F TL81 6200004940 S.COIL MLF1608D R27K-T BL82 6200005140 S.COIL MLF1608D R33K-T BL83 6200004790 S.COIL MLF1608D R47K-T BL84 6200003630 S.COIL MLF1608D R68K-T BL85 6200006970 S.COIL MLF1608A 3R9K-T BL86 6200003630 S.COIL MLF1608D R68K-T BL87 6200003960 S.COIL MLF1608A 1R0K-T BL88 6200006710 S.COIL MLF1608E 5R6K 5.6U BL89 6200003640 S.COIL MLF1608E 100K-T BL90 6200002040 S.COIL NL 252018T-101J BL91 6200006970 S.COIL MLF1608A 3R9K-T BL92 6200005180 S.COIL MLF1608D R39K-T TL93 6200005700 S.COIL ELJRE 22NG-F TL94 6200005720 S.COIL ELJRE 33NG-F TL95 6200005680 S.COIL ELJRE 15NG-F TL99 6200005500 S.COIL NL 322522T-471J TL101 6200005640 S.COIL ELJRE 6N8Z-F TL102 6200006960 S.COIL MLF1608A 2R7K-T TL104 6200007170 S.COIL MLF1608A 3R3K-T TL105 6150004840 S.COIL LS-510 BL106 6200005500 S.COIL NL 322522T-471J TL112 6200008570 S.COIL LQW2BHN6N8D01L (LQN21A 6N8D04) TL113 6200008570 S.COIL LQW2BHN6N8D01L (LQN21A 6N8D04) TL119 6200006670 S.COIL ELJRE 68NG-F BL120 6200005740 S.COIL ELJRE 47NG-F BL121 6200009100 S.COIL ELJRE R18G-F BL122 6200007740 S.COIL LQW2BHN47NJ01L (LQN21A 47NJ04) TL123 6200009290 S.COIL LQW18AN47NG00D (LQW1608A47NG00) TL124 6200010910 S.COIL LQW18AN56NG00D TL125 6200009290 S.COIL LQW18AN47NG00D (LQW1608A47NG00) TL126 6200009070 S.COIL LQW18AN18NG00D (LQW1608A18NG00) TL127 6200009070 S.COIL LQW18AN18NG00D (LQW1608A18NG00) TL128 6200006980 S.COIL ELJRE R10G-F BL129 6200005610 S.COIL ELJRE 3N9Z-F TL130 6200005610 S.COIL ELJRE 3N9Z-F TL131 6200005610 S.COIL ELJRE 3N9Z-F TL132 6200005610 S.COIL ELJRE 3N9Z-F TL133 6200006990 S.COIL ELJRE 56NG-F TL134 6200003550 S.COIL MLF1608A 4R7K-T T

R4 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR6 7030005710 S.RESISTOR ERJ2GEJ 121 X (120 Ω) TR8 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR9 7030005310 S.RESISTOR ERJ2GEJ 124 X (120 kΩ) BR10 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) B

S.=Surface mount

R11 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR13 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR14 7030005070 S.RESISTOR ERJ2GEJ 683 X (68 kΩ) TR15 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR16 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR18 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR19 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR20 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR26 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR28 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR29 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR30 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) BR31 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR34 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR35 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR36 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) TR46 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR49 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR50 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR54 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) TR55 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR56 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) TR57 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR58 7030005010 S.RESISTOR ERJ2GEJ 681 X (680 Ω) TR59 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) TR60 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR61 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR62 7030009160 S.RESISTOR ERJ2GEJ 181 X (180 Ω) TR68 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR78 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) BR81 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR88 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR91 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR93 7030005710 S.RESISTOR ERJ2GEJ 121 X (120 Ω) TR95 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR98 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR99 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR100 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) TR101 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR102 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR103 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR105 7030005590 S.RESISTOR ERJ2GEJ 680 X (68 Ω) TR106 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR108 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR110 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) TR112 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR116 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR159 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR172 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR174 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR177 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR179 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR203 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) TR204 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR205 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR207 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR208 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR209 7030005010 S.RESISTOR ERJ2GEJ 681 X (680 Ω) TR216 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR220 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) TR221 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR222 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR223 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR224 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) BR225 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR226 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR228 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR229 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR230 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR231 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR232 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) BR233 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) BR234 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) BR235 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR236 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR237 7030009140 S.RESISTOR ERJ2GEJ 272 X (2.7 kΩ) BR238 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR239 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR240 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR241 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR243 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B

6 - 10

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 40: ICOM IC R20 Service Manual

[RF UNIT][RF UNIT]

R245 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) BR246 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) BR247 7030011150 S.RESISTOR ERJ2GEJ 2R7 X (2.7 Ω) BR323 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR324 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) TR325 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR326 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR327 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR329 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR330 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR335 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR346 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR347 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR352 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR353 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR354 7030005600 S.RESISTOR ERJ2GEJ 273 X (27 kΩ) TR355 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) TR356 7030008280 S.RESISTOR ERJ2GEJ 271 X (270 Ω) TR357 7030005230 S.RESISTOR ERJ2GEJ 334 X (330 kΩ) TR358 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) TR359 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) TR360 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR361 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) TR362 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) TR363 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR364 7030005720 S.RESISTOR ERJ2GEJ 563 X (56 kΩ) TR365 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) TR366 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR367 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) TR368 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR369 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR370 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR372 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR373 7030008410 S.RESISTOR ERJ2GEJ 392 X (3.9 kΩ) BR374 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR375 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR376 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) BR377 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR378 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR379 7030007310 S.RESISTOR ERJ2GEJ 155 X (1.5 MΩ) TR380 7030009140 S.RESISTOR ERJ2GEJ 272 X (2.7 kΩ) TR381 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR382 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) TR383 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) TR384 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR385 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR386 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR387 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR388 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR389 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR390 7030005600 S.RESISTOR ERJ2GEJ 273 X (27 kΩ) TR391 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR392 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR393 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) TR394 7030005600 S.RESISTOR ERJ2GEJ 273 X (27 kΩ) TR396 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) TR397 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR398 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR414 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) TR415 7030007310 S.RESISTOR ERJ2GEJ 155 X (1.5 MΩ) TR423 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) TR425 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR426 7030005010 S.RESISTOR ERJ2GEJ 681 X (680 Ω) TR427 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) TR428 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR429 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR430 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR431 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) TR432 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR433 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR434 7030009160 S.RESISTOR ERJ2GEJ 181 X (180 Ω) TR435 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR436 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR437 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) TR438 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR439 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) TR440 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR441 7030005010 S.RESISTOR ERJ2GEJ 681 X (680 Ω) TR442 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR443 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) TR444 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) T

S.=Surface mount

R445 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR446 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR447 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR448 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR449 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR450 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR451 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) BR452 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR453 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) BR454 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR455 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) BR457 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR458 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) BR459 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) BR461 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) TR462 7030008410 S.RESISTOR ERJ2GEJ 392 X (3.9 kΩ) BR463 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR464 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) BR465 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) BR466 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR467 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR469 7030005070 S.RESISTOR ERJ2GEJ 683 X (68 kΩ) TR471 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) TR472 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR473 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR474 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) TR475 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR476 7030005310 S.RESISTOR ERJ2GEJ 124 X (120 kΩ) BR478 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) BR479 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) BR481 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR482 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR483 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) BR484 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) BR485 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) BR486 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR487 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) BR488 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) BR489 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) TR490 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR491 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) TR492 7030007270 S.RESISTOR ERJ2GEJ 151 X (150 Ω) TR493 7030007270 S.RESISTOR ERJ2GEJ 151 X (150 Ω) TR494 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR495 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR496 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR497 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) TR498 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) TR499 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR500 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) TR501 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR503 7030007310 S.RESISTOR ERJ2GEJ 155 X (1.5 MΩ) TR505 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) TR510 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR511 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) BR512 7030008410 S.RESISTOR ERJ2GEJ 392 X (3.9 kΩ) TR513 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) TR514 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR515 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR516 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR517 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR518 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) TR519 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR520 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR521 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) TR522 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR523 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR524 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) TR525 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR526 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR527 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR528 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) TR529 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) TR530 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) TR531 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) BR532 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR533 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) BR534 7030011150 S.RESISTOR ERJ2GEJ 2R7 X (2.7 Ω) BR536 7030003290 S.RESISTOR ERJ3GEYJ 560 V (56 Ω) TR537 7030003290 S.RESISTOR ERJ3GEYJ 560 V (56 Ω) TR538 7030010040 S.RESISTOR ERJ2GE-JPW B

6 - 11

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 41: ICOM IC R20 Service Manual

[RF UNIT][RF UNIT]

R539 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) BR540 7030005300 S.RESISTOR ERJ2GEJ 150 X (15 Ω) BR541 7030007270 S.RESISTOR ERJ2GEJ 151 X (150 Ω) TR542 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) T

C5 4030017730 S.CERAMIC ECJ0EB1E471K TC12 4030017420 S.CERAMIC ECJ0EC1H470J BC13 4030017650 S.CERAMIC ECJ0EC1H270J BC14 4030017460 S.CERAMIC ECJ0EB1E102K BC15 4030017340 S.CERAMIC ECJ0EC1H010B BC16 4030017460 S.CERAMIC ECJ0EB1E102K BC18 4030016790 S.CERAMIC ECJ0EB1C103K TC22 4030017590 S.CERAMIC ECJ0EC1H070C TC23 4030017380 S.CERAMIC ECJ0EC1H050B TC27 4030017460 S.CERAMIC ECJ0EB1E102K TC28 4030017460 S.CERAMIC ECJ0EB1E102K TC30 4030017460 S.CERAMIC ECJ0EB1E102K TC32 4030017460 S.CERAMIC ECJ0EB1E102K TC40 4030017640 S.CERAMIC ECJ0EC1H150J TC41 4030017380 S.CERAMIC ECJ0EC1H050B TC42 4030017370 S.CERAMIC ECJ0EC1H3R5B TC43 4030017430 S.CERAMIC ECJ0EC1H101J TC44 4030016790 S.CERAMIC ECJ0EB1C103K TC45 4030017730 S.CERAMIC ECJ0EB1E471K TC46 4030017360 S.CERAMIC ECJ0EC1H030B TC47 4030017580 S.CERAMIC ECJ0EC1H060C TC48 4030017580 S.CERAMIC ECJ0EC1H060C TC49 4030017360 S.CERAMIC ECJ0EC1H030B TC50 4030017340 S.CERAMIC ECJ0EC1H010B TC51 4030017560 S.CERAMIC ECJ0EC1H2R5B TC52 4030017730 S.CERAMIC ECJ0EB1E471K TC54 4030017460 S.CERAMIC ECJ0EB1E102K TC55 4030017460 S.CERAMIC ECJ0EB1E102K TC58 4030017460 S.CERAMIC ECJ0EB1E102K TC59 4030017350 S.CERAMIC ECJ0EC1H020B TC60 4030016790 S.CERAMIC ECJ0EB1C103K BC61 4030017460 S.CERAMIC ECJ0EB1E102K BC62 4550006200 S.TANTALUM ECST0JY106R BC63 4030017700 S.CERAMIC ECJ0EC1H151J BC64 4030017640 S.CERAMIC ECJ0EC1H150J BC65 4030016790 S.CERAMIC ECJ0EB1C103K BC66 4030016790 S.CERAMIC ECJ0EB1C103K BC69 4030017460 S.CERAMIC ECJ0EB1E102K BC70 4030017460 S.CERAMIC ECJ0EB1E102K TC71 4030017360 S.CERAMIC ECJ0EC1H030B TC73 4030017460 S.CERAMIC ECJ0EB1E102K TC74 4030017460 S.CERAMIC ECJ0EB1E102K BC75 4030017460 S.CERAMIC ECJ0EB1E102K TC92 4030016790 S.CERAMIC ECJ0EB1C103K TC93 4030017460 S.CERAMIC ECJ0EB1E102K TC94 4030017460 S.CERAMIC ECJ0EB1E102K TC95 4030017460 S.CERAMIC ECJ0EB1E102K TC96 4030016790 S.CERAMIC ECJ0EB1C103K TC97 4030016790 S.CERAMIC ECJ0EB1C103K TC98 4030017730 S.CERAMIC ECJ0EB1E471K TC99 4030017730 S.CERAMIC ECJ0EB1E471K TC100 4030016930 S.CERAMIC ECJ0EB1A104K TC101 4030017620 S.CERAMIC ECJ0EC1H100C TC102 4030017460 S.CERAMIC ECJ0EB1E102K TC103 4030016790 S.CERAMIC ECJ0EB1C103K TC121 4030017460 S.CERAMIC ECJ0EB1E102K BC134 4030017460 S.CERAMIC ECJ0EB1E102K TC136 4030017590 S.CERAMIC ECJ0EC1H070C TC138 4030017730 S.CERAMIC ECJ0EB1E471K TC141 4030016790 S.CERAMIC ECJ0EB1C103K TC142 4030017460 S.CERAMIC ECJ0EB1E102K TC145 4030017460 S.CERAMIC ECJ0EB1E102K TC147 4030017560 S.CERAMIC ECJ0EC1H2R5B TC148 4030017730 S.CERAMIC ECJ0EB1E471K TC150 4030017460 S.CERAMIC ECJ0EB1E102K TC153 4030016930 S.CERAMIC ECJ0EB1A104K TC200 4030016790 S.CERAMIC ECJ0EB1C103K BC201 4030016930 S.CERAMIC ECJ0EB1A104K TC202 4030016930 S.CERAMIC ECJ0EB1A104K TC203 4030016930 S.CERAMIC ECJ0EB1A104K BC206 4030017370 S.CERAMIC ECJ0EC1H3R5B TC214 4030017460 S.CERAMIC ECJ0EB1E102K TC218 4030017340 S.CERAMIC ECJ0EC1H010B TC221 4030016790 S.CERAMIC ECJ0EB1C103K TC233 4030017460 S.CERAMIC ECJ0EB1E102K B

S.=Surface mount

C239 4030016790 S.CERAMIC ECJ0EB1C103K TC241 4030011810 S.CERAMIC C1608 JB 1A 224K-T BC242 4030011810 S.CERAMIC C1608 JB 1A 224K-T TC259 4030017430 S.CERAMIC ECJ0EC1H101J TC264 4030017460 S.CERAMIC ECJ0EB1E102K TC402 4030017460 S.CERAMIC ECJ0EB1E102K BC408 4030017460 S.CERAMIC ECJ0EB1E102K BC410 4030017460 S.CERAMIC ECJ0EB1E102K TC414 4030017460 S.CERAMIC ECJ0EB1E102K TC416 4030017650 S.CERAMIC ECJ0EC1H270J BC424 4030016790 S.CERAMIC ECJ0EB1C103K TC427 4030017400 S.CERAMIC ECJ0EC1H220J TC430 4030016790 S.CERAMIC ECJ0EB1C103K TC431 4030016790 S.CERAMIC ECJ0EB1C103K TC432 4030017460 S.CERAMIC ECJ0EB1E102K TC433 4030017460 S.CERAMIC ECJ0EB1E102K BC434 4030016930 S.CERAMIC ECJ0EB1A104K BC435 4030017460 S.CERAMIC ECJ0EB1E102K TC436 4030017360 S.CERAMIC ECJ0EC1H030B TC503 4030017460 S.CERAMIC ECJ0EB1E102K BC504 4030017460 S.CERAMIC ECJ0EB1E102K BC505 4030017460 S.CERAMIC ECJ0EB1E102K BC511 4030018010 S.CERAMIC ECJ0EC1H360J BC512 4030017620 S.CERAMIC ECJ0EC1H100C BC513 4030017430 S.CERAMIC ECJ0EC1H101J BC514 4030017710 S.CERAMIC ECJ0EC1H181J BC515 4030017690 S.CERAMIC ECJ0EC1H121J BC516 4030017440 S.CERAMIC ECJ0EC1H221J BC517 4030017430 S.CERAMIC ECJ0EC1H101J BC518 4030017440 S.CERAMIC ECJ0EC1H221J BC519 4030017780 S.CERAMIC ECJ0EB1E472K BC520 4030018080 S.CERAMIC ECJ0EB1H182K BC521 4030016930 S.CERAMIC ECJ0EB1A104K BC522 4030017910 S.CERAMIC ECJ0EB1H152K BC523 4030017910 S.CERAMIC ECJ0EB1H152K BC524 4030016790 S.CERAMIC ECJ0EB1C103K BC525 4030017780 S.CERAMIC ECJ0EB1E472K BC526 4030017900 S.CERAMIC ECJ0EB1C123K BC527 4030017420 S.CERAMIC ECJ0EC1H470J BC528 4030017620 S.CERAMIC ECJ0EC1H100C BC529 4030017700 S.CERAMIC ECJ0EC1H151J BC530 4030017450 S.CERAMIC ECJ0EB1E271K BC531 4030017430 S.CERAMIC ECJ0EC1H101J BC532 4030016930 S.CERAMIC ECJ0EB1A104K BC533 4030017910 S.CERAMIC ECJ0EB1H152K BC534 4030017430 S.CERAMIC ECJ0EC1H101J BC535 4030017750 S.CERAMIC ECJ0EB1E122K BC536 4030016930 S.CERAMIC ECJ0EB1A104K BC537 4030016930 S.CERAMIC ECJ0EB1A104K BC538 4030016930 S.CERAMIC ECJ0EB1A104K BC539 4030016930 S.CERAMIC ECJ0EB1A104K BC540 4030016930 S.CERAMIC ECJ0EB1A104K BC541 4030016930 S.CERAMIC ECJ0EB1A104K BC542 4030016930 S.CERAMIC ECJ0EB1A104K BC543 4030017460 S.CERAMIC ECJ0EB1E102K BC544 4030017460 S.CERAMIC ECJ0EB1E102K BC545 4030016790 S.CERAMIC ECJ0EB1C103K BC546 4030016930 S.CERAMIC ECJ0EB1A104K BC548 4030017460 S.CERAMIC ECJ0EB1E102K BC558 4030017460 S.CERAMIC ECJ0EB1E102K BC560 4030017460 S.CERAMIC ECJ0EB1E102K TC561 4030017460 S.CERAMIC ECJ0EB1E102K BC562 4030017460 S.CERAMIC ECJ0EB1E102K BC563 4030017460 S.CERAMIC ECJ0EB1E102K BC566 4030016790 S.CERAMIC ECJ0EB1C103K BC567 4030016930 S.CERAMIC ECJ0EB1A104K BC568 4030017420 S.CERAMIC ECJ0EC1H470J TC569 4030016930 S.CERAMIC ECJ0EB1A104K BC570 4030017460 S.CERAMIC ECJ0EB1E102K BC571 4030017460 S.CERAMIC ECJ0EB1E102K BC657 4030017700 S.CERAMIC ECJ0EC1H151J BC658 4030018140 S.CERAMIC ECJ0EB1H391K BC659 4550006200 S.TANTALUM ECST0JY106R BC662 4030016930 S.CERAMIC ECJ0EB1A104K TC663 4030016930 S.CERAMIC ECJ0EB1A104K TC664 4030016930 S.CERAMIC ECJ0EB1A104K TC665 4030017430 S.CERAMIC ECJ0EC1H101J TC666 4030018140 S.CERAMIC ECJ0EB1H391K TC667 4030016790 S.CERAMIC ECJ0EB1C103K BC669 4030017460 S.CERAMIC ECJ0EB1E102K BC673 4030017460 S.CERAMIC ECJ0EB1E102K T

6 - 12

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 42: ICOM IC R20 Service Manual

[RF UNIT][RF UNIT]

C674 4030017420 S.CERAMIC ECJ0EC1H470J BC676 4030017400 S.CERAMIC ECJ0EC1H220J TC677 4030017350 S.CERAMIC ECJ0EC1H020B TC678 4030017460 S.CERAMIC ECJ0EB1E102K TC679 4030017460 S.CERAMIC ECJ0EB1E102K TC683 4030017460 S.CERAMIC ECJ0EB1E102K TC686 4030018140 S.CERAMIC ECJ0EB1H391K TC687 4030018140 S.CERAMIC ECJ0EB1H391K TC688 4030016790 S.CERAMIC ECJ0EB1C103K TC689 4030016790 S.CERAMIC ECJ0EB1C103K TC690 4030016790 S.CERAMIC ECJ0EB1C103K TC691 4030016790 S.CERAMIC ECJ0EB1C103K TC692 4030016790 S.CERAMIC ECJ0EB1C103K TC694 4030016930 S.CERAMIC ECJ0EB1A104K TC697 4030016790 S.CERAMIC ECJ0EB1C103K TC698 4030016790 S.CERAMIC ECJ0EB1C103K TC699 4030017440 S.CERAMIC ECJ0EC1H221J TC700 4030016790 S.CERAMIC ECJ0EB1C103K TC701 4030016790 S.CERAMIC ECJ0EB1C103K TC702 4030016930 S.CERAMIC ECJ0EB1A104K TC703 4030017480 S.CERAMIC C1608 JB 1A 474K-T TC704 4030016790 S.CERAMIC ECJ0EB1C103K TC705 4030016930 S.CERAMIC ECJ0EB1A104K TC706 4030017460 S.CERAMIC ECJ0EB1E102K TC707 4030017460 S.CERAMIC ECJ0EB1E102K BC708 4030011810 S.CERAMIC C1608 JB 1A 224K-T BC709 4030016930 S.CERAMIC ECJ0EB1A104K BC710 4030017460 S.CERAMIC ECJ0EB1E102K BC711 4030016930 S.CERAMIC ECJ0EB1A104K TC712 4030016930 S.CERAMIC ECJ0EB1A104K TC713 4030016930 S.CERAMIC ECJ0EB1A104K TC714 4030016790 S.CERAMIC ECJ0EB1C103K TC715 4030016790 S.CERAMIC ECJ0EB1C103K TC716 4030017730 S.CERAMIC ECJ0EB1E471K TC717 4030016930 S.CERAMIC ECJ0EB1A104K TC718 4030016790 S.CERAMIC ECJ0EB1C103K TC719 4030017460 S.CERAMIC ECJ0EB1E102K TC720 4030016790 S.CERAMIC ECJ0EB1C103K TC740 4030016790 S.CERAMIC ECJ0EB1C103K TC741 4030016790 S.CERAMIC ECJ0EB1C103K TC744 4030016790 S.CERAMIC ECJ0EB1C103K TC745 4030017730 S.CERAMIC ECJ0EB1E471K TC746 4030017370 S.CERAMIC ECJ0EC1H3R5B TC747 4030017460 S.CERAMIC ECJ0EB1E102K TC748 4030017460 S.CERAMIC ECJ0EB1E102K TC749 4030017460 S.CERAMIC ECJ0EB1E102K TC750 4030017460 S.CERAMIC ECJ0EB1E102K TC752 4030017400 S.CERAMIC ECJ0EC1H220J TC753 4030017400 S.CERAMIC ECJ0EC1H220J TC754 4030017460 S.CERAMIC ECJ0EB1E102K TC755 4030017730 S.CERAMIC ECJ0EB1E471K TC756 4030016930 S.CERAMIC ECJ0EB1A104K TC757 4030016930 S.CERAMIC ECJ0EB1A104K TC758 4030016790 S.CERAMIC ECJ0EB1C103K TC759 4030017460 S.CERAMIC ECJ0EB1E102K TC760 4030017460 S.CERAMIC ECJ0EB1E102K TC761 4030017460 S.CERAMIC ECJ0EB1E102K TC762 4030017430 S.CERAMIC ECJ0EC1H101J TC764 4030017460 S.CERAMIC ECJ0EB1E102K TC765 4030017620 S.CERAMIC ECJ0EC1H100C TC766 4030016790 S.CERAMIC ECJ0EB1C103K TC767 4030011810 S.CERAMIC C1608 JB 1A 224K-T BC768 4030017730 S.CERAMIC ECJ0EB1E471K TC769 4030017730 S.CERAMIC ECJ0EB1E471K TC770 4030016790 S.CERAMIC ECJ0EB1C103K TC771 4030016790 S.CERAMIC ECJ0EB1C103K TC772 4030017460 S.CERAMIC ECJ0EB1E102K TC773 4030016930 S.CERAMIC ECJ0EB1A104K TC774 4030016790 S.CERAMIC ECJ0EB1C103K TC775 4550006200 S.TANTALUM ECST0JY106R BC776 4030011810 S.CERAMIC C1608 JB 1A 224K-T BC777 4030016790 S.CERAMIC ECJ0EB1C103K TC778 4030016790 S.CERAMIC ECJ0EB1C103K TC779 4030016790 S.CERAMIC ECJ0EB1C103K BC780 4030016930 S.CERAMIC ECJ0EB1A104K BC781 4030017440 S.CERAMIC ECJ0EC1H221J TC782 4030017440 S.CERAMIC ECJ0EC1H221J TC783 4030016930 S.CERAMIC ECJ0EB1A104K TC784 4030016790 S.CERAMIC ECJ0EB1C103K TC785 4030017640 S.CERAMIC ECJ0EC1H150J BC786 4030017700 S.CERAMIC ECJ0EC1H151J B

S.=Surface mount

C788 4030016790 S.CERAMIC ECJ0EB1C103K BC789 4030017460 S.CERAMIC ECJ0EB1E102K BC790 4030016790 S.CERAMIC ECJ0EB1C103K BC791 4550006200 S.TANTALUM ECST0JY106R BC792 4030016790 S.CERAMIC ECJ0EB1C103K BC793 4030016790 S.CERAMIC ECJ0EB1C103K BC794 4030017460 S.CERAMIC ECJ0EB1E102K BC795 4030016930 S.CERAMIC ECJ0EB1A104K BC796 4030011810 S.CERAMIC C1608 JB 1A 224K-T BC797 4030017460 S.CERAMIC ECJ0EB1E102K TC807 4030017460 S.CERAMIC ECJ0EB1E102K TC808 4030017460 S.CERAMIC ECJ0EB1E102K TC809 4030017460 S.CERAMIC ECJ0EB1E102K TC811 4030017460 S.CERAMIC ECJ0EB1E102K TC812 4030017460 S.CERAMIC ECJ0EB1E102K TC814 4030017350 S.CERAMIC ECJ0EC1H020B TC815 4030017460 S.CERAMIC ECJ0EB1E102K TC816 4030017460 S.CERAMIC ECJ0EB1E102K TC817 4030017590 S.CERAMIC ECJ0EC1H070C TC827 4030017460 S.CERAMIC ECJ0EB1E102K BC828 4030017460 S.CERAMIC ECJ0EB1E102K BC832 4030017460 S.CERAMIC ECJ0EB1E102K BC833 4030017340 S.CERAMIC ECJ0EC1H010B BC834 4030017460 S.CERAMIC ECJ0EB1E102K BC835 4030017460 S.CERAMIC ECJ0EB1E102K BC836 4030017460 S.CERAMIC ECJ0EB1E102K BC837 4030017430 S.CERAMIC ECJ0EC1H101J BC838 4030017430 S.CERAMIC ECJ0EC1H101J BC839 4030017460 S.CERAMIC ECJ0EB1E102K BC840 4030017460 S.CERAMIC ECJ0EB1E102K BC841 4030017390 S.CERAMIC ECJ0EC1H180J BC842 4030017460 S.CERAMIC ECJ0EB1E102K BC843 4030017600 S.CERAMIC ECJ0EC1H080C BC844 4030017460 S.CERAMIC ECJ0EB1E102K TC845 4030017600 S.CERAMIC ECJ0EC1H080C TC846 4030017460 S.CERAMIC ECJ0EB1E102K TC847 4030017460 S.CERAMIC ECJ0EB1E102K TC848 4030017360 S.CERAMIC ECJ0EC1H030B TC849 4030017430 S.CERAMIC ECJ0EC1H101J TC850 4030017430 S.CERAMIC ECJ0EC1H101J TC851 4030017650 S.CERAMIC ECJ0EC1H270J TC852 4030017650 S.CERAMIC ECJ0EC1H270J TC853 4030017640 S.CERAMIC ECJ0EC1H150J TC854 4030017610 S.CERAMIC ECJ0EC1H090C TC855 4030017420 S.CERAMIC ECJ0EC1H470J TC856 4030017590 S.CERAMIC ECJ0EC1H070C TC857 4030017430 S.CERAMIC ECJ0EC1H101J TC858 4030017630 S.CERAMIC ECJ0EC1H120J TC859 4030017460 S.CERAMIC ECJ0EB1E102K TC860 4030017460 S.CERAMIC ECJ0EB1E102K TC861 4030017460 S.CERAMIC ECJ0EB1E102K TC862 4030017460 S.CERAMIC ECJ0EB1E102K BC863 4030017460 S.CERAMIC ECJ0EB1E102K BC864 4030016930 S.CERAMIC ECJ0EB1A104K TC865 4030017460 S.CERAMIC ECJ0EB1E102K TC866 4030017460 S.CERAMIC ECJ0EB1E102K TC867 4030016790 S.CERAMIC ECJ0EB1C103K TC868 4030017460 S.CERAMIC ECJ0EB1E102K TC869 4030016790 S.CERAMIC ECJ0EB1C103K TC870 4030016790 S.CERAMIC ECJ0EB1C103K TC871 4030016790 S.CERAMIC ECJ0EB1C103K TC872 4030016930 S.CERAMIC ECJ0EB1A104K BC873 4030017440 S.CERAMIC ECJ0EC1H221J TC874 4030017390 S.CERAMIC ECJ0EC1H180J TC875 4030017510 S.CERAMIC ECJ0EC1H680J TC876 4030017500 S.CERAMIC ECJ0EC1H560J TC877 4030016790 S.CERAMIC ECJ0EB1C103K TC878 4030016790 S.CERAMIC ECJ0EB1C103K TC879 4030017620 S.CERAMIC ECJ0EC1H100C TC880 4030017460 S.CERAMIC ECJ0EB1E102K BC881 4030017460 S.CERAMIC ECJ0EB1E102K BC882 4030017460 S.CERAMIC ECJ0EB1E102K TC884 4030017460 S.CERAMIC ECJ0EB1E102K BC885 4030017460 S.CERAMIC ECJ0EB1E102K TC886 4030017460 S.CERAMIC ECJ0EB1E102K TC887 4030017460 S.CERAMIC ECJ0EB1E102K TC888 4030017460 S.CERAMIC ECJ0EB1E102K TC889 4030016930 S.CERAMIC ECJ0EB1A104K TC890 4030016930 S.CERAMIC ECJ0EB1A104K TC891 4030016790 S.CERAMIC ECJ0EB1C103K BC893 4030016790 S.CERAMIC ECJ0EB1C103K T

6 - 13

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 43: ICOM IC R20 Service Manual

[TANSHI BOARD][RF UNIT]

C894 4030016790 S.CERAMIC ECJ0EB1C103K TC895 4030017730 S.CERAMIC ECJ0EB1E471K TC896 4030016790 S.CERAMIC ECJ0EB1C103K TC897 4030017460 S.CERAMIC ECJ0EB1E102K BC898 4030017460 S.CERAMIC ECJ0EB1E102K BC899 4030017460 S.CERAMIC ECJ0EB1E102K BC900 4030017460 S.CERAMIC ECJ0EB1E102K BC901 4030017460 S.CERAMIC ECJ0EB1E102K TC902 4030017420 S.CERAMIC ECJ0EC1H470J TC903 4030017420 S.CERAMIC ECJ0EC1H470J TC904 4030017420 S.CERAMIC ECJ0EC1H470J TC905 4030017420 S.CERAMIC ECJ0EC1H470J TC906 4030017420 S.CERAMIC ECJ0EC1H470J TC907 4030017420 S.CERAMIC ECJ0EC1H470J TC908 4030017420 S.CERAMIC ECJ0EC1H470J TC909 4550007130 S.TANTALUM ECST0GX107R BC910 4550007130 S.TANTALUM ECST0GX107R BC911 4550007130 S.TANTALUM ECST0GX107R BC912 4030016930 S.CERAMIC ECJ0EB1A104K BC913 4030017460 S.CERAMIC ECJ0EB1E102K TC914 4030017460 S.CERAMIC ECJ0EB1E102K TC916 4030017460 S.CERAMIC ECJ0EB1E102K TC917 4030017460 S.CERAMIC ECJ0EB1E102K TC918 4030017460 S.CERAMIC ECJ0EB1E102K BC919 4030017460 S.CERAMIC ECJ0EB1E102K BC920 4030017460 S.CERAMIC ECJ0EB1E102K TC921 4030017460 S.CERAMIC ECJ0EB1E102K BC922 4030017700 S.CERAMIC ECJ0EC1H151J T

J1 6510022160 S.CONNECTOR AXN440C040P T

W1 7120000470 JUMPER ERDS2T0W2 7120000470 JUMPER ERDS2T0

EP1 0910058144 PCB B 6078D EP2 3310003010 ANTENNA KY-058-006-2 <KAI>

S.=Surface mount

D1 1710000050 DIODE 1SS53 T

R1 7100000820 RESISTOR 2SG 0.15 TR2 7510000530 THERMISTOR ERT-D2FHL 103S T

C1 4010007620 CERAMIC DSXE65SJ YF 473Z T

RL1 6330001630 RELAY A-5W-K T

J1 6510003570 CONNECTOR S09B-EH-S T

EP1 0910052472 PCB B 5425B EP2 9001602001 TUBE IRRAX 0.7 (d) L=10 mm

IC1 1110005090 S.IC MM1433EVBE TIC2 1110006250 S.IC NJM2360AM-TE3 T

Q1 1520000600 S.TRANSISTOR 2SB1184 TL Q TQ2 1590001870 S.TRANSISTOR DTA114EE TL TQ3 1590003450 S.TRANSISTOR UNR9214J-(TX) TQ4 1590001870 S.TRANSISTOR DTA114EE TL TQ5 1590001870 S.TRANSISTOR DTA114EE TL TQ6 1590001870 S.TRANSISTOR DTA114EE TL TQ7 1550000020 S.FET 2SJ377 (TE16R) TQ8 1590002310 S.TRANSISTOR DTC114EE TL T

D1 1790000680 S.DIODE SB20-03P-TD TD2 1790000680 S.DIODE SB20-03P-TD TD3 1790001250 S.DIODE MA2S111-(TX) TD4 1790000850 S.DIODE MA132WK (TX) TD5 1750000120 S.DIODE DWA010-TE TD6 1790000680 S.DIODE SB20-03P-TD T

L1 6190001150 COIL HK-08S050-2010 T

R2 7030003340 S.RESISTOR ERJ3GEYJ 151 V (150 Ω) TR3 7030003410 S.RESISTOR ERJ3GEYJ 561 V (560 Ω) TR5 7030005321 S.RESISTOR ERA3YED 103V TR6 7030005501 S.RESISTOR ERA3YKD 124V (120 kΩ) TR9 7030003720 S.RESISTOR ERJ3GEYJ 224 V (220 kΩ) TR11 7030005691 S.RESISTOR ERA3YED 123V TR12 7030006601 S.RESISTOR ERA3YED 272V TR14 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) TR15 7030003700 S.RESISTOR ERJ3GEYJ 154 V (150 kΩ) TR16 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) TR17 7030003420 S.RESISTOR ERJ3GEYJ 681 V (680 Ω) TR18 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) TR19 7030007330 S.RESISTOR ERJ1WRSJR15U (0.15 Ω) TR21 7030003410 S.RESISTOR ERJ3GEYJ 561 V (560 Ω) TR22 7030007911 S.RESISTOR ERA3YKD 563V (56 kΩ) TR23 7030003200 S.RESISTOR ERJ3GEYJ 100 V (10 Ω) T

C1 4030009660 S.CERAMIC C1608 JF 1C 224Z-T TC2 4510004510 ELECTROLYTIC 25 MV 470 HC TC3 4030006850 S.CERAMIC C1608 JB 1H 471K-T TC4 4510004590 ELECTROLYTIC 16 MV 470 HC TC5 4030006900 S.CERAMIC C1608 JB 1H 103K-T TC6 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC7 4030009660 S.CERAMIC C1608 JF 1C 224Z-T TC8 4510006760 ELECTROLYTIC 20 SA 100M TC9 4030009660 S.CERAMIC C1608 JF 1C 224Z-T T

6 - 14

REF ORDER DESCRIPTION M.NO. NO.REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

6-2 BC-156

REF ORDER DESCRIPTION M.NO. NO.

[MAIN UNIT]

Page 44: ICOM IC R20 Service Manual

[MAIN UNIT]

C10 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC12 4510004590 ELECTROLYTIC 16 MV 470 HC TC13 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC14 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC15 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC16 4550000540 S.TANTALUM TEESVA 1V 154M8L TC18 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC19 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC20 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC21 4510004640 S.ELECTROLYTIC ECEV1CA470SP TC22 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC23 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC24 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC25 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC26 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC27 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC28 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC29 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC30 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC31 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC32 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC33 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC34 4030011600 S.CERAMIC C1608 JB 1E 104K-T TC35 4030006860 S.CERAMIC C1608 JB 1H 102K-T TC36 4550006540 S.TANTALUM ECST1CY475R T

J1 6450000410 CONNECTOR HEC0470-01-630 T

F1 5210000040 FUSE FGB 2A (FGB0 125V) TF2 5220000020 HOLDER S-N5051 TF3 5220000020 HOLDER S-N5051 T

DS1 5040002150 LED VRPG3349S-734 T

WS1 8600036620 OTHER EX2308 P01*J04MA

EP1 0910052462 PCB B 5373B

S.=Surface mount

6 - 15

REF ORDER DESCRIPTION M.NO. NO.

M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

Page 45: ICOM IC R20 Service Manual

7 - 1

SECTION 7 MECHANICAL PARTS AND DISASSEMBLY

S24 2250000200 Encoder TP90N00E20-16F-1517 1S25 2250000200 Encoder TP90N00E20-16F-1517 1

DS12 5030002690 LCD M3-0243TIY 1

MP2 8930062480 2699 LCD holder 1MP3 8930062530 2699 battery spring 2MP4 8930062540 Sponge (HO) 1MP5 8510016370 2699 LOGIC shield plate Y725 1

REF. NO. ORDER NO. DESCRIPTION QTY.

SECTION 7 MECHANICAL PARTS AND DISASSEMBLY

[CHASSIS PARTS]

REF. NO. ORDER NO. DESCRIPTION

[DOWNCONV BOARD]

[REC UNIT]

MP1 8510016250 2699 A-REC case 1MP2 8510016260 2699 B-REC case 1

REF. NO. ORDER NO. DESCRIPTION QTY.

Screw abbreviations B0, BT: Self-tappingPH: Pan head, FH: Flat head, NI-ZU: Nickel-ZincZK: Black

[ACCESSORIES]

EP1 3310002670 Antenna FA-B04RE 1EP2 0800005460 Battery BP-206 ACC except [SEA] 1EP3 0800006350 AC adapter BC-149A [USA], [EXP-01], [CAN] only 1

0800006360 AC adapter BC-149D [EUR], [FRA], [EXP-02] only 1

MP1 8930061480 Clip MB-98 ACC (2742 clip assembly) 1MP2 8930050410 2304 spacer 1MP3 8010018080 Strap belt HK-009 1

REF. NO. ORDER NO. DESCRIPTION QTY.

MP1 8510016240 2699 conv case 1MP2 8930062490 2699 conv plate 1

REF. NO. ORDER NO. DESCRIPTION QTY.

[RF UNIT]

EP1

EP2 EP3

MP1 MP2 MP3

MP4

EP 2 3310003010 Antenna KY-058-006-2 <KAI> 1

MP1 8930063280 Double side tape (AP) 1

REF. NO. ORDER NO. DESCRIPTION QTY.

[1STAVCO BOARD]

MP1 8510016210 2699 A-VCO case Y723 1

REF. NO. ORDER NO. DESCRIPTION QTY.

[1STBVCO BOARD]

MP1 8510016220 2699 B-VCO case Y724 1

REF. NO. ORDER NO. DESCRIPTION QTY.

[2NDCVCO BOARD]

MP1 8510016230 2699 C-VCO case 1

REF. NO. ORDER NO. DESCRIPTION QTY.

[2NDDVCO BOARD]

MP1 8510016230 2699 C-VCO case 1J1 6510024470 Connector BNC-R168 1

W1 8900009640 Cable OPC-963 1

MP1 8210020700 2699 front panel assembly 1MP2 8210020710 2699 rear panel assembly 1MP3 8110008140 2699 battery cover 1MP4 8310061220 2699 lock plate 1MP5 8930062400 2699 jack cap 1MP6 8930062410 2699 USB cap 1MP7 8610011940 Knob N320 2MP8 8930062440 2699 detection button 1MP9 8930062450 2699 button 1MP11 8930062470 2699 TOP PLATE 1MP12 8930062500 2699 A-terminal Y713 1MP13 8930062510 2699 B-terminal Y714 1MP14 8930062520 2699 C-terminal Y715 3MP15 8930051630 2304 sheet 1MP16 8930050560 2304 C1-terminal 1MP17 8930050570 2304 C2-terminal 1MP18 8930051390 2304 shaft 1MP19 8830000570 knut (A) FX643 2MP20 8810005700 Screw PH No.0 M2 × 4 black 1MP21 8810009220 Screw PH B0 M2 × 8 ZK (BT) 2MP22 8810008750 Screw PH BT M2 × 15 ZK 4MP23 8930051851 891 terminal rubber (B)-1 3MP24 8610007510 Knob spring No.7800 [SEA], [EXP], [CAN] only 2MP26 8810008640 Screw FH BT No.0 M2 × 4 NI-ZU 3MP27 8810008640 Screw FH BT No.0 M2 × 4 NI-ZU 4MP28 8810008640 Screw FH BT No.0 M2 × 4 NI-ZU 2MP29 8310061230 2699 window plate 1MP30 8930062390 2699 window sheet 1MP31 8930062420 2699 lens 1MP32 8930062430 2699 keyboard 1MP34 8810008640 Screw FH BT No.0 M2 × 4 NI-ZU 1MP35 8810005700 Screw FH No.0 M2 × 4 black 1MP36 8930063290 Insulation sheet (HW) 3

SP 1 2510000960 speaker K036NA500-26 1

QTY.

[LOGIC UNIT]

REF. NO. ORDER NO. DESCRIPTION QTY.

Page 46: ICOM IC R20 Service Manual

7 - 2

4.22

Unit; mm (inch)

140

1 (1/32)

(5/32)(3/32)

(1/32)

(19/32)

(2 1/32) (1 9/32)

(1 11/32)

(4 3/8) (1/8)

(5 9

/ 16)

(6 3

/ 16)

58 1 32.9

33.9

14.8

34.8 0.9

157

UNIT abbreviations(C) : CHASSIS PARTS(R) : RF UNIT(D) : DOWNCONV BOARD(L) : LOGIC UNIT

(RE) : REC UNIT

(1A) : 1STAVCO BOARD(1B) : 1STBVCO BOARD(2C) : 2NDCVCO BOARD(2D) : 2NDDVCO BOARD

LOGIC UNIT

REC UNIT

RF UNIT

J1 (C)

W1 (C)SP1 (C)

MP31 (C)

MP32 (C)

MP30 (C)

MP29 (C)

MP1 (C) MP2 (C)

MP4 (C)

MP18 (C)

MP21 (C)

MP3 (C)

MP15 (C)

MP11 (C)

MP26 (C)

S24 (L)

MP1 (1A)

MP1 (R)

EP1 (R)

MP1 (D)MP2 (D)

MP1 (2C)

MP1 (2D)

MP1 (1B)

MP27 (C)

MP2 (RE)

MP28 (C)

MP3 (L)

MP5 (L)

DS12 (L)

MP2 (L)

MP4 (L)

MP20 (C)

MP22 (C)

MP23 (C)

MP23 (C)

MP23 (C)MP14 (C)

MP36 (C)MP16 (C)

MP17 (C)

MP5 (C)

MP9 (C)

MP6 (C)

MP13 (C)

MP12 (C)

MP8 (C)

MP34 (C)

MP19 (C)

S25 (L)

MP7 (C)

MP1 (RE)

MP27 (C)

1STBVCO BOARD

DOWNCONV BOARD

2NDDVCOBOARD

2NDCVCO BOARD

1STAVCOBOARD

MP35 (C)

Page 47: ICOM IC R20 Service Manual

8 - 1

SECTION 8 SEMI-CONDUCTOR INFORMATION

• TRANSISTOR AND FET’SIC-R20

BC-156

2SB1132 R(Symbol: BAR)

B

E

C

B

E

C

B

E

C

2SA1362-GR(Symbol: AEG)

2SA1586-GR(Symbol: SG)

2SA1588 GR(Symbol: ZG)

B

E

C

2SC4116 GR(Symbol: LL)

B

E

C

B

E

C

2SC4117-BL(Symbol: CL)

B

E

C

B

E

C

2SC4226 R24(Symbol: R24)

B

E

C

B

E

E

C

2SC4617 TLS(Symbol: BS)

B

E

C

2SC5006-T1(Symbol: 24)

B

E

C

2SC5008-T1(Symbol: 24)

2SC5231C8-TL(Symbol: C8)

2SC5277D2-TL(Symbol: D2)

2SC5624VH-TL(Symbol: VH-)

D

G

S

2SK1069-4(Symbol: FJ)

D

G

S

2SK880-GR(Symbol: XG)

2SJ144-Y(Symbol: VX)

UMD6N TR(Symbol: D6)

UNR9110J(Symbol: 6L)

UNR9111J(Symbol: 6A)

UNR9113J(Symbol: 6C)

UNR9115J(Symbol: 6E)

UNR921NJ(Symbol: EX)

UPA805T-T1(Symbol: T82)

XP1110(Symbol: AD)

XP4312(Symbol: 7T)

XP4601(Symbol: 5C)

XP6501-AB (Symbol: 5N)

XP1113(Symbol: 7L)

XP1501-AB(Symbol: 5R)

B

C

E

2SB1201-S-TL(Symbol: B1201)

B

C

E

DTC114EE TL(Symbol: 24)

B

E

C

2SB1184 TL Q(Symbol: B1184)

2SJ377(Symbol: 4L)

DTA114EE TL(Symbol: 14)

UNR9214J-(TX)(Symbol: 8D)

B

C

E

FH102-TL(Symbol: 102)

HAT1023R-EL(Symbol: 1023)

S

D

G

E1

B2

B1

C1

C2

E2

D2

D2

D1

D1

G2

S2

G1

S1

E1

C2

B1

C1

E2

B2

B1

E

B2

C1

C2

E1

B1

B2

C1

C2

B1

E

B2

C1

C2

E1

C2

B1

C1

E2

B2

E1

C2

B1

C1

E2

B2

E1

E2

B2

C1

B1

C2

G

G

D

D

S

SB

E

C

B

E

C

B

E

C

B

E

C

B

E

C

B

E

C

B

E

C

E1

B2

B1

C1

C2

E2

• DIODESIC-R20

BC-156

1SV308(Symbol: TX)

DAP222 TL(Symbol: P)

A C

HVC376BTRF(Symbol: B9)

HN2V02H-B(Symbol: 2V02H)

A

A

C

C

A C

A C

A C

A

C

A

C

HVC350BTRF(Symbol: B0)

HVC375BTRF(Symbol: B8)

1SS372(Symbol: N9)

1SV172(Symbol: BE)

1SV245(Symbol: T3)

HVC417CTRU(Symbol: A8)

SB07-03C-TB(Symbol: J)

MA8027-H(Symbol: 2^7)

RB876W TL(Symbol: 3X)

SVC347S/T-TL(Symbol: V1)

MA2S111(Symbol: A)

1SS400(Symbol: A)

MA133(Symbol: MP)

MA2S077(Symbol: S)

MA2S728(Symbol: B)

MA2S111-(TX)(Symbol: A)

1SS53(Symbol: White line)

DWA010-TE(Symbol: W8)

MA132WK(TX)(Symbol: MU)

SB20-03P-TD(Symbol: SC)

AC

1SV314(Symbol: V6)

AC

AC

AC

AC AC

A

C

A C

A1

C2

C1A C

A C

AC

white A1

A2

C1

C2

C

A1

A2

C

A

A

C, A

C, A

A

C

A1

C1

A C

Page 48: ICOM IC R20 Service Manual

9 - 1

The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board.

J1

140

2021 LD2+3SGND

B_VCO2B_VCO3B_VCO4PLLCK

PLLDATASTR2HFCB1CB2CB3C

DCLKLD1EAR

A_VCO1A_VCO2

GND

B_DETB_R3VGND

B_NOISEB_RSSI

+3VGND

PLLBSTBPLLDSTB

VPGND

PLLESTBPLLCSTBPLLASTB

RFOA_DETA_R3VGND

A_NOISEA_RSSI

to LOGIC UNIT J5

W2

W1

ANT

SECTION 9 BOARD LAYOUTS

9-1 RF UNIT• TOP VIEW

Page 49: ICOM IC R20 Service Manual

9 - 2

The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board.

+3VA_R3V

A_VCO1A_VCO2A_VCO3

GNDGND

A_VCO_OUT

1

8

to 1STAVCO BOARD J2

VPGND

PLLASTBPLLDATA

PLLCKAPSOSC

GN

DC

_VC

O_O

UT

AP

SG

ND

A_R

3V

1

7

to 1STAVCO BOARD J1

HJ2HJ3

red

blackgreen

white

EP2

HJ6HJ9

RF_INGNDOSC

PLLCKPLLDATAPLLESTB

GNDIF_OUT

8

1

to DOWNCONV BOARD J1

+3VB_R3V

B_VCO1B_VCO2B_VCO3B_VCO4

GNDB_VCO_OUT

1

8

to 1STBVCO BOARD J2

HJ7

VPGND

PLLBSTBPLLDATA

PLLCKBPSOSC

1

7

to 1STBVCO BOARD J1

+3S+3V

DOWN_CONV2GLO1GLOGND

6

1

to DOWNCONV BOARD J2

HJ10

HJ11

to 2NDCVCO BOARD J1

HJ5

HJ4

HJ8

5 1

PLL

CS

TB

PLL

DA

TA

PLL

CK

+3V

GN

DO

SC

to 2NDCVCO BOARD J2

1 6

B_R

3VG

ND

BP

SD

_VC

O_O

UT

GN

D

to 2NDDVCO BOARD J11 5

OS

CG

ND

+3V

PLL

CK

PLL

DA

TA

PLL

DS

TB

to 2NDDVCO BOARD J26 1

2413

RF UNIT• BOTTOM VIEW

Page 50: ICOM IC R20 Service Manual

9 - 3

The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board.

GNDSUB_3C

VOL_UP_DOWNSQLTXDRXD

1

6to REC UNIT J7

HJ9

J9

DCfrom the external DC power supply

J6J3

B DIAL

A DIAL

AOUTA_ATNB_ATNGND

1

4

to REC UNIT J6

HJ8

CP2CP4

CP1CP3

Li-ion Battery

EXT SP/CI-Vfrom the

external speaker

LCDJ5

140

2021LD2

+3SGND

B_VCO2B_VCO3B_VCO4PLLCK

PLLDATASTR2HFCB1CB2CB3C

DCLKLD1EAR

A_VCO1A_VCO2

GND

B_DETB_R3VGND

B_NOISEB_RSSI

+3VGND

PLLBSTBPLLDSTB

VPGND

PLLESTBPLLCSTBPLLASTB

RFOA_DETA_R3VGND

A_NOISEA_RSSI

to RF UNIT J1

+–

9-2 LOGIC UNIT• TOP VIEW

Page 51: ICOM IC R20 Service Manual

9 - 4

The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board.

AFOUTGND

12

12

J8

SPW18

W19

+

LOGIC UNIT• BOTTOM VIEW

Page 52: ICOM IC R20 Service Manual

9 - 5

The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board.

GNDAOUTB_AINA_ATN

4

1

to LOGIC UNIT HJ8

J6

VL DOWN

USB

VL UP SQL

+3VSUB_3C

VOL_UP_DOWNSQL

CPU_TXCPU_RX

1

6to LOGIC UNIT HJ9

J7

9-3 REC UNIT• TOP VIEW

Page 53: ICOM IC R20 Service Manual

The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board.

9 - 6

REC UNIT• BOTTOM VIEW

Page 54: ICOM IC R20 Service Manual

The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board.

J2

J1

A_R

3VG

ND

AP

SC

_VC

O_O

UT

GN

D

to RF UNIT HJ5

1 5

OS

CG

ND

+3V

PLL

CK

PLL

DA

TA

PLL

DS

TB

to RF UNIT HJ4

6 1

J2

J1

B R

3VG

ND

BP

SD

_VC

O_O

UT

GN

D

to RF UNIT HJ9

1 5

OS

CG

ND

+3V

PLL

CK

PLL

DA

TA

PLL

DS

TB

to RF UNIT “HJ8”

6 1

9 - 7

9-4 1STAVCO BOARD• TOP VIEW

9-5 1STBVCO BOARD• TOP VIEW

9-6 2NDCVCO BOARD• TOP VIEW

9-7 2NDDVCO BOARD• TOP VIEW

9-8 DOWNCONV BOARD• TOP VIEW

Page 55: ICOM IC R20 Service Manual

The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board.

IF_O

UT

GN

DP

LLE

ST

BP

LLD

AT

AP

LLC

KO

SC

GN

DR

F_I

N

1 8

to RF UNIT HJ10

GN

D1G

LO2G

LOD

OW

N_C

ON

V+

3V+

3S

1 6

to RF UNIT HJ11

J1

J2

J2

B_VCO_OUTGND

B_VCO4B_VCO3B_VCO2B_VCO1B_R3V

+3V

8

1

to RF UNIT HJ6

J2

A_VCO_OUTGNDGND

A_VCO3A_VCO2A_VCO1A_R3V

+3V

8

1

to RF UNIT HJ2

J1

OSCBPS

PLLCKPLLDATAPLLBSTB

GNDVP

7

1

to RF UNIT HJ7

J1

OSCAPS

PLLCKPLLDATAPLLASTB

GNDVP

7

1

to RF UNIT HJ3

9 - 8

1STAVCO BOARD• BOTTOM VIEW

1STBVCO BOARD• BOTTOM VIEW

2NDCVCO BOARD• BOTTOM VIEW

2NDDVCO BOARD• BOTTOM VIEW

DOWNCONV BOARD• BOTTOM VIEW

Page 56: ICOM IC R20 Service Manual

10 - 1

D681SV172

ANTENNA

BPFCERAMIC

AM/NFM

FI8CFWM450E

AMDET

Q545 ×1/2XP6501

1SV308D65–D66, D73, D74

D64, D67, D70: 1SV308D76: MA2S077

LPF

BPF

ATT

D69: 1SV308Q507: 2SC5008Q508: XP4312

D100: SVC347 Q513: XP4601

RFAMP

IC18:µPC2746TB

BPF

RFAMP

Q14: 2SC5006

D166: MA2S728D162: MA2S728

BPF

D1–D2: HVC350B

D25: 1SV308D29: 1SV308D72: 1SV308

BPFHPF RFAMP

Q36:2SC5006

D167:MA2S728D160:MA2S728

D11: 1SV308D3: 1SV308D13: 1SV308

LPF

BPF

D174: HVC375BD173: HVC375B

BPF

RFAMP

Q24: 2SC5008

IC15:µPC2757TB

1STMIXER

BRF

B 1ST IF FILTER

FI1EFCH266MKQP1

D130: MA2S077D131: MA2S077

BPFXTAL

FI7FL-293

AM/NFM

LPF

WFM

IFAMP

Q5422SC5006

LOAMP

Q5552SC5006

3RD LO AMPLPF

WFM

IFAMP

Q544XP6501

D139:MA2S728Q547:UNR9213J

Q526: UNR9113JQ524: 2SC4617Q528: 2SC5006Q523: 2SC4617

Q522: 2SC4617

Q521: 2SC4617Q525: XP6501

D171: HVC350BQ556: 2SC4617 X1: CR-593

Q530: 2SC4617

D116: RB876WD115: RB876W

Q531: 2SC4617

Q5322SK1069

IC16:µPC2757TB

2NDMIXER

D132: MA2S077D133: MA2S077

Q543UNR9113J

D134:1SS400D135:1SS400 D136: 1SS400

D137: 1SS400

Q545 ×1/2XP6501

IFAMP

Q5: 2SC5006

BPFXTAL

FI3FL-293

AM/NFM/SSBIC10µPC2757TB

2ND MIXERD60:MA2S077D61:MA2S077

AMDET

Q4 ×1/2XP6501

LOAMP

Q540: 2SC5006

3RD LO AMP

LPF

WFM

LPF

WFM

Q4 ×1/2XP6501

RFAMP

IC19µPC2746TB

IC1µPC2757TB

1ST Mix

D110:1SS400D109:1SS400D108:1SS400

IFAMP

Q1XP6501

D58: MA2S077D59: MA2S077

D112: 1SS400D111: 1SS400

D113: 1SS400

BRF

A 1ST IF FILTER

FI4EFCH429MKQP1

D114: MA2S728Q529: UNR9213J

Q41: UNR9113J

BPFCERAMIC

AM/NFM

FI2: CFWM450E

BPFCERAMIC

SSB/CW

FI6: CFWM450K3

BPF

D145–D146: HVC350B

Q506: UNR9110JQ510: UMD6

LPF

Q552:UNR9113JD75:1SV308

D101:MA2S077

RFAMP

Q549: 2SC5006

D161: MA2S728D152: MA2S728

PREAMP

Q550: FH102

D148: MA2S728D149: MA2S728

PREAMP

Q551: µPA805T

D151: MA2S728D150: MA2S728

RFAMP

Q548: 2SC5006

D153: MA2S728D158: MA2S728

BPF

D141 D142HVC350B

RFAMP

Q35:2SC5006

D168:MA2S728D159:MA2S728

BPF

D4–D5: HVC350B

RFAMP

Q505: 2SC4226

D163: MA2S728D164: MA2S728

BPF

D175:HVC375BD176:HVC375B

RFAMP

Q26: 2SC5624

D156: MA2S728D155: MA2S728

D143: 1SV308D32: 1SV308D36: 1SV308

IC3: µPC2757TBMIX

RFAMP

IC2: µPC2749TB

D1: 1SV308

HPF

D2: 1SV308

D8: 1SV308D7: 1SV308

HPF

Doubler

D6: 1SV308D5: 1SV308

BUFF

Q4: 2SC5624

Q5: XP1113

Q1: 2SC5006D3: 1SV245

VCO

LPF

BUFF

Q2: 2SC5006

IC4: MB15B03SL

BUFF

Q6: 2SC5277

LOAMP

Q9: 2SC5231LO AMP

BUFF

Q8: 2SC5231IC3: MB15T61UL

BUFF

Q12: 2SC5277

BUFF

IC2: µPC2746TB

D2:1SV245Q1:2SC50061BVCO

Q2:2SC5006D3:HVC417C2BVCO

Q3:2SC5006D4:HVC417C3BVCO

Q4, Q5:2SC5006D5:HVC417C4BVCO

D7–D10: 1SV308

Q10–Q11: XP1113 D1:HVC350B

Q1:FH102VCO

FILRIPPLE

Q4: 2SC4617

FILLOOP

IC1: MB15E03SL

BUFF

Q3: 2SC5277

+3REG

Q501: UNR9113J

300M3V

+3REG

Q502: XP1113

A_VHF3VA_UHF3V

+3REG

Q502: XP1113

B_VHF3V

+3REG

Q554: XP1113

B_UHF3V

+3REG

Q554: XP1113

B_G3V

+3REG

Q503: XP1113

B_800M3V

+3REG

Q503: XP1113

D7–D9:1SV308

LOAMP

Q92SC5231

BUFF

IC2: µPC2746TB

BUFF

Q8: 2SC5231

BUFF

Q13: 2SC5227

Q2:2SC5006D3:HVC417C2AVCO

IC3: MB15T61

Q11, Q12: XP1113

Q3: 2SC5006D4: HVC417C3AVCO

D2: 1SV245Q1: 2SC50061AVCO

FILLOOP

FILRIPPLE

Q4: 2SC4617

D1: 1SV314Q1: FH102

VCO

IC1: MB15E03SL

BUFF

Q3: 2SC5277

FILLOOP

Q6:2SK880Q7:2SC4117

FILLOOP

Q6: 2SK880Q7: 2SC4117

NB3V

+3REG

Q527: UNR9113J

+3REG

Q546: XP4312

B_AM3V

Q553XP1113

+3REG

Q509: UNR9113J

HF3V

Q504: XP1110D178: 1SS400

Q534: XP1113D119: DAP222

Q519: UNR9113J

A-AGC

A-AGC

B-AGC

B-AGC

A-AGC

A-AGC

B-AGC

B-AGC

B-AGC

A-AGC

B-AGC

A_3

00M

C

A_V

HF

C

A_U

HF

C

B_8

00M

C

B_G

C

B_U

HF

C

B_V

HF

C

NB

C

B_A

MC

HF

C

LIMIT

BANDSW

ANTBAR

BANDSW

ANTTUNE

LEVELCONV.

SWBANDBAND

SW

MODESW

FM IF-IC

ANL

MUTESWDET

AGC

NBAMP

REFCONT.

RFOAMP

AMP3rd IF

AMPSSBAF

MODESW

WIDEFMCONT.

SWMODE

SWMODE

AGC

SWMODE MODE

SW FM IF IC SWMODE

SW

ANL

MODE

AGC

WIDEFMCONT.

OSCREF

ATT-CONT.

VPA-TRAC

D169–D170: MA2S728

ANTSW

ANTSW

D34: 1SV308

D147: 1SV308

SWBAND

SWBAND

SWBAND

BANDSW SW

BAND

LOSELCT

PLLIC

DOWNCONV BOARD

OSC

PLLIC

D1:1SV245

LOSW

VCO 3V

1–4B3V1B3V

2B3V

3B3V

4B3V

1–4B3V

ICPLL

A_R3V

A_R3V

B_R3V

1A3V

3A3V

IC

3V

2A3V

LOSW

1–4A3V

D1: 1SV245

1–3A3V

PLL

VCO

ICPLL

A_R3V

NB3VNB3VNB3V

NB3V

B_AM3VB_AM3VB_AM3V

MODECONT.

BMODEC

B_R3V

B AM FMB WFMC

B MODECB MODECB MODECB MODEC

OSC

B_R3V B_R3V

B_R3V

B_R3VB_R3VB_R3V

OSC

OSC

HF3V

BANDSELECT

HF3V

A_VHF3V

B_VHF3V

300M3V

A_UHF3V

B_VHF3V

B_800M3V

B_G3V

OSC

A_R3V A_R3V A_R3V A_R3V

A_R3V

OSC

A_R3V

AMODEC

MODECONT.

A_R3V

SSB3V

A WFMC A NFMC

SSBC

AMODECAMODECAMODECAMODEC

+3S

OSC

1STBVCO BOARD2NDDVCOBOARD

1STAVCO BOARD2NDCVCOBOARD

IC17: TA31136FN

IC2: TA31136FN

409.4500/448.7500 MHz

247.0500/286.3500 MHz

849.1000–899.0999 MHz

604.1000–849.0999 MHz

429.2500–604.0999 MHz

863.3000–1099.6999MHz

566.3000–686.6999 MHz

384.7000–441.6999 MHz

683.3000–866.6999 MHz

1001.0000/2002.0000 MHz

OSCBFO

AFSW

IC12: CD4066

A_DETFM

A_DETSSB A_DETAM

A_DET

IC21: CD4066

AFSW

DET OUT

AM DET

B_DET

DA/EXPNDIC22: CD4094IC20, IC14: M62366

MF

HF-L

HF-H

A-VHF

B-VHF

30–300 MHz

A-UHF

B-UHF

800 MHz

1GHz

19.2 MHz

19.2 MHz

19.2 MHz

A-AGC

266.7 MHz 19.65 MHz

19.65 MHz429.1 MHz

A 2ND IF FILTER

B 2ND IF FILTER

0.1500 – 3304.9999 MHz

0.4950–1.6200 MHz

B 3RD IF FILTER

0.450 MHz

A 3RD IF FILTER0.450 MHz

A-IFIN

B-IFIN

B-MIXOUT

A-MIXOUT

A_DET

B_DET

RF UNITExplanatory notes

VOLTAGE LINE

RX LINE

RECORDING LINE

PLAYBACK LINE

SECTION 10 BLOCK DIAGRAM

Page 57: ICOM IC R20 Service Manual

10 - 2

RESET

EEPROM

X1: CR-717

PREAMP

PREAMP

AFAMP

+3REG

+3REG

+3REG

+3REG

+3REG

LPF

LPF

+3REG

X2: CR-708

X1: CR-672

X2: CSBF453K

IC3: M30620

LCD DRIVE

BFOC

DC-DC REG

VP

CIV-INTERFACE

LIGHT

IC2: BD5228G

IC1: CAT24WC256

CPU3V

IC2:M30620

SUBCPU MEMORY

USB INTERFACE

IC6:K9F5608U0C-YCB0

J2

AF IN/OUT

D0-D7

IC7: ML2302TB

REC IC

IC3: FT245BM

TONE FIL

TONE FIL

AF FIL/AMP

AF FIL/AMP

CLOCK SHIFT

BFO

INT/KEYMATRIX

A DIAL

B DIAL

D14: HVC376B

IC4: TC7W04FUQ3 : 2SA1586Q6 : 2SC4116

D2 : MA2S728D3 : 1SS400D5 : MA2S728D6 : 1SS400D7 : 1SS400D8 : MA2S728D9 : 1SS400D10: 1SS400D11: MA2S728D12: 1SS400

B_CTONE

B_RTONE

A_RTONE

A_CTONE

IC12: LM2904PWR

IC13: LM2904PWR

Q23: 2SC4617Q25: XP6501Q26: 2SJ144

Q22: 2SC4617Q24: XP6501Q27: 2SJ144

VR

SW

Q19: 2SJ144

B AMUTE

IC7: SM6451BQ12: 2SC4617

Q16: 2SC4617

IC5: TA31056FQ7 : XP1501Q8 : 2SA1588Q9 : 2SB1132

ROUT

EXTSP

INTSP

A_DET

B_DET

Li+

EXTDC

CHGC

CHGS

+3S

CPU3

+3V

A_R3

B_R3

Q13: XP6501Q14: 2SA1588

IC8: RN111N321B

Q17: 2SA1588

Q10: 2SA1362

Q15: 2SA1362

BFO

B_DET

B_DET

A_DET

B_DET

A_DET

A_DET

A_DET

B_DET

Q30: 2SB1201Q31: HAT1023RQ32: 2SC4617Q33: 2SB1132Q34: UNR9215JQ35: UNR9213J

CHARGE CONTROL

LOUT

J3

J8

BACKLIGHT CONTROL

Q1 : 2SC4617Q4 : 2SC4617Q5 : 2SC4617Q36: 2SC4617DS1–DS11: SML-512MWEP12: CV1081

IC6: SN74AHC1CU04DBVRX2: CSBFB453KQ11: UNR9113JD18: HN2V02H

D22–25: 1SS372Q28: 2SC4617IC11: TC7W04FU

IC9: RN111N321B

D28: MA2S111D29: SB07-03CD34: SB07-03CD35: MA2S728D36: MA133

USB

6.000 MHz

9.8304 MHz

16.384 MHz

MAIN CPU

REC UNIT

LOGIC UNIT

Explanatory notesVOLTAGE LINE

RX LINE

RECORDING LINE

PLAYBACK LINE

Page 58: ICOM IC R20 Service Manual

3.0V433 MHz

0VATT-ON

2.9V5 MHz

2.0V145 MHz

2.6V145 MHz

51 MHz2.9V

2.9V145 MHz

2.6V433 MHz

2.9V433 MHz

3.0V145 MHz

2.9V470 MHz

2.9V1295 MHz

1.9V433 MHz

12345678

B_R3V

IFO16

AGC

ATT

IFO10

A_R3V

A-AGC

ANTSW

B_TRAC

A_ATTC

AGCAGC

AGC

AG

CA

GC

AG

C

AGC

AGC

AGC

AGCAGC

R22015

C2140.001

R1082.2k

C160.001

C4350.001

C5660.01

R88330

C4080.001

R2262.2k

C1210.001

L616.8nH

R6120

L135.6nH

C43100p

R952.2k

Q508XP4312

1 2 3

456

L913.9µH

D101MA2S077

C5440.001

L410.1µH

C6620.1

R982.2k

R10647k

C148470p

C5630.001

C5390.1

R10147k

R1122.2k

C5370.1

C2063.5p

R2162.2k

R78330

R238100k

L444.7nH

C5610.001

C5210.1

C270.001

R2392.2k

C1327p

R2314.7k

R13 15k

R228100

C5430.001

R10012k

R1022.2k

C140.001

C320.001

R23010k

C665100p

R10568

L810.27µH

C151p

C440.01

C501p

C493p

R1147k

C4015p

C5240.01

R1647k

C1340.001

C550.001

R110 12k

R1047k

C1247p

L3939nH

L1115nH

C5450.01

R23610k

C415p

L566.8nH

C476p

C2181p

R221330

R2222.2k

C423.5p

C5380.1

C4320.001

C6630.1

C5600.001

C1367p

C56847p

C690.001

R22947k

C1472.5p

L820.33µH

C5460.1

C529150p

C700.001

C4100.001

R2232.2k

C5690.1

L933nH

C227p

C5700.001

R991k

R2243.3k

C5580.001

R912.2k

C235p

C280.001

C592p

C67447p

R2372.7k

C486p

R4330

C41627p

L606.8nH

C1410.01

L515nH

L830.47µH

C516220p

C300.001

C1500.001

C6670.01

L920.39µH

C5360.1

C5230.0015

L853.9µH

C2330.001

C5620.001

C5710.001

C4140.001

L422nH

C580.001

C5480.001

C1420.001

R815k

L1022nH

R2401k

R1815k

R93120

C52470p

R1947k

C5400.1

C5470p

L1210nH

R1547k

L700.10µH

C138470p

R812.2k

C1530.1

C540.001

R24522k

C5320.1

C6772p

L9322nH

L9433nH

C6780.001

L9515nH

FI4 EFCH429MKQP1

I

C6790.001

C6830.001

Q509UNR9113J

IC15µPC2757TB1

RFI2GND3LO

4PS

5VCC

6IFO

IC16µPC2757TB

1 RFI2 GND3 LO 4PS5VCC6IFO

L7447nHC747

0.001

C7500.001

C7463.5p

C7480.001

R42315

C4363p

C7490.001

L1547nH

C713p

L1016.8nH

L1126.8nH

R47115k

C8070.001

C8080.001

C8090.001

C8110.001

R472330

C8120.001

R47347k

C8142p

C8150.001

C8160.001

L1136.8nH

R47447k

C8177p

R4752.2k

D1431DV308

C8270.001

C8280.001

R478330

R47915k

C8320.001

R48147k

C8331p

C8340.001

C8350.001

C8360.001

R4822.2k

D1471SV308

R48347k

C837100p

C838100p

Q550FH102

1

2

34

5

6

R4854.7k

C8390.001

C8400.001

R488330

C8420.001

C8438p

C84118p

Q551UPA805T

1

2

34

5

6

R4904.7k

L12247nH

C8440.001

C8458p

C8460.001

C8470.001

R491330

R492150

R493150

C849100p

C850100p

R48422k

R48922k

C85127p

C85227p

C85315p

C8549p

C85547p

C8567p

C857100p

C85812p

C8590.001

Q552UNR9113J

R495 4.7k

R4964.7k

C8600.001 C861

0.001

R4944.7k

D152 MA2S728

D153 MA2S728

D154 MA2S728

D155MA2S728

IC18µPC2746TB

1 IN

2 GND

3 GND 4OUT 5GND 6VCC

C8640.1

C8650.001

R50082C866

0.001

IC19µPC2746TB

1IN

2GND

3 GND 4OUT5

GND6

VCC

C6640.1

R5014.7k

D156MA2S728

D157 MA2S728

D158 MA2S728

D159 MA2S728

D160 MA2S728 D161 MA2S728

D162 MA2S728

D163MA2S728

D164MA2S728

D166 MA2S728

D167 MA2S728

D168 MA2S728

C8680.001

R335100k

C6730.001

C67622p

D169MA2S728

D170MA2S728

C8720.1

CP3

ANTENNA0.1500 – 3304.9999 MHz

IC1µPC2757TB

1 RFI2 GND3 LO 4PS

5VCC

6IFO

FI1 EFCH266MKQP1

I

IC10µPC2757TB1 RFI2 GND3 LO 4PS

5VCC

6IFO

Q510UMD6

1

2

3 4

5

6

D1HVC350B

D2HVC350B

D4HVC350B

D5HVC350B

D141HVC350B

D142HVC350B

D145HVC350B

D146HVC350B

D31SV308

D111SV308

D131SV308

D251SV308

D291SV308

D321SV308

D34 1SV308

D361SV308

D721SV308

D731SV308

D741SV308

D751SV308

D76MA2S077

C666390p

D148MA2S728

D149MA2S728

D150MA2S728

D151MA2S728

L1210.18µH

L2868nH

L147nH

L11968nH

L12047nH

L1280.1µH

R234820

R233820

R2323.3k

D173HVC375B

D174HVC375B

L1293.9nH

L1303.9nH

C1450.001

L1313.9nH

L1323.9nH

C8860.001

C887 0.001

D175HVC375B

D176HVC375B

R522100k

R523100k R524

100k

Q242SC5008

C45470p

C512.5p

C8483p

C8880.001

R46968k

Q5482SC5006

R1468k

Q352SC5006

Q362SC5006

L315nH

L13356nH

L90100µH

C513100p

C51136p C514

180p

C51210p C515

120p

C5190.0047

C517100p

C518220p

C5200.0018

L840.68µH

D651SV308

L860.68µH

L871µH

C52747p

C52810p

C530270p

C531100p

C5330.0015

C534100p C535

0.0012

C657150p C658

390p

L885.6µH

L8910µH

D661SV308

D641SV308

D701SV308

D671SV308

C8910.01

C5220.0015

C5250.0047

C5260.012

L12618nH

L12718nH

L12347nH

Q5072SC5008

Q142SC5006

Q5492SC5006

L12456nH

L12547nH

R327100

R2351k

R225 1k

D691SV308

R9120k

R476120k

C895470p

Q5052SC4226

C8970.001

C8980.001

C8990.001

C9000.001

C9010.001

R323 220

R497 220

R324100

R32582

R32682

R498100

R49982

R531100k

R486100

R487100

Q262SC5624

R20330

C463p

R53310

C910100

R2412.2k

D1781SS400

CP18

R53915

R54015

C9210.001

L431.5nH

Q504XP1110

1

2

34

5

Q506UNR9110J

C5410.1

C5420.1

D681SV172

B1C

HFC

B2C

ANTSW

AN

TS

WA

NT

SW

A_TRAC

A_TRAC

A_T

RA

C

A_TRACA_TRACA_TRACA_TRAC

A_R3V

B_TRAC B_TRAC

B_T

RA

C

A_R3VA_R3V

A_R

3VA

_R3V

B_G3VB_G3VB_G3V

B_UHF3VB_UHF3V

B_TRAC

A_UHF3V

A_U

HF

3VA

_UH

F3V

A_TRAC

B_ATTC

B_A

TT

C

B_ATTC

B_ATTC

B_ATTC

B_ATTC

A_R3V

B_R3V

B_R3V

B_R

3VB

_R3V

300M3V

A_ATTC

A_ATTCA_ATTCA_ATTC A_ATTC

A_ATTC

A_A

TT

CA

_AT

TC

A_A

TT

C

ANTSW

B_R3V

B_800M3VB_800M3V

B_800M3V

B_800M3V

B_TRAC B_TRACB_TRAC

A_VHF3V

ATT

B3C

B_VHF3V

B_R3V

B_RXV

EAREAREAR

EAR

C_V

CO

OU

T

A_V

CO

OU

T

B BAND RF INB_VCO OUT B_VCO OUT

C9190.001

D_VCO OUT

D_VCO OUT

A-BAND VHF

B-BAND VHF

A-BAND UHF

B BAND UHF

B BAND 800M

30 – 300 MHz

B_BAND 1G

UHF PRE-AMP

VHF PRE-AMP

ANTSW

ANTSW

ANTSW

EAR

ANTSW

B BAND RF AMP

A BAND RF AMP

HF H

HF L

MF

O

C5670.1

R243100k

CP5

CP6

CP7

D100SVC347

CP8

R2472.7

C9120.1

R538JPW

R246220k

W1 W2

EP2

BAR ANTENNA0.4950 – 1.6200 MHz

1B

2W

3R

4G

blue

white

red

green

C505 0.001

C504 0.001

C503 0.001

Q501UNR9113J

C862 0.001

C863 0.001

Q502XP1113

1

2

34

5

Q503XP1113

1

2

34

5

Q554XP1113

1

2

34

5

A_UHF3V

A_VHF3V

B_G3V

B_800M3V

A_UHFC

B_GC

B_800MC

B_VHFC

B_UHFC

A

B_VHF3V

B_V

HF

3V

B_UHF3V

B_U

HF

3VB

_UH

F3V

300M3V

A_VHFC

A_300MC

A_R3V

B_R3V

O

R329100k

Q513XP4601

123

4 5 6

R33015k

C6690.001

A_TRAC

VP

VP

B

Explanatory notesVOLTAGE LINE

RX LINE

IF_OUT

HJ10

R5102.2k

C92310p

C92410p

C923 – C925except[SEA], [EXP]

C92510p

OSC OSC

RFINGND

PLLESTBPLLDATAPLLCK

PLLESTBPLLDATA

PLLCK

HJ11112233445566

DOWN_CONV2GLO1GLO

+3V

to DOWNCONV BOARD J1

to DOWNCONVBOARD J2

R5342.7

C911100

+3S

DOWN CONV BOARD

R5112.2k

RFIN

11 - 1

SECTION 11 VOLTAGE DIAGRAM

11-1 RF UNIT

Page 59: ICOM IC R20 Service Manual

11 - 2

2.9VWFM

433 MHz1.5V

3.0V433 MHz

2.9VNB-ON

1.0VNB-ON

2.9VCW

1.8V

1.6V

3.0V

C7130.1

2.9VWFM

2.6VCW

3.0V145 MHz

2.9VCW

+3V

J1

1STAVCOBOARD

2NDCVCOBOARD

2NDDVCOBOARD

1STBVCOBOARD

LOGICUNIT

IFO16

B_R3V

AGC

ATT

IFO10

A_R3V

A-AGC

ANTSW

B_TRAC

A_ATTC

R20810k

C2640.001

R5715k

C1020.001C427

22p

C63150p

C650.01

R341k

C960.01

C2030.1

C1000.1

R29470k

R1591k

R591.5k

C2210.01

R56470

R311k

R6847k

C950.001

L173.3µH

C180.01

C2000.01

C1030.01

R10310k

R6147k

C920.01

C6210

R60100k

C740.001

C4340.1

R116150k

C940.001

C970.01

R4910k

C4330.001

R281M

C2420.22

C750.001

Q1 XP6501

123

4 5 6

R58680

C10110p

C259100p

C4300.01

Q4XP6501

123

5 6

123

4 5 6

L732.7µH

R20510k

C6415p

C2010.1

C2390.01

R5422k

C2410.22

R20710k

C730.001

R5010k

C610.001

R2647k

C65910

C660.01

C600.01

C2020.1

R177100k

R3515k

C4310.001

C930.001

D1061SS400

D1071SS400

L99470µH

R464.7k

D1081SS400

D1091SS400

D1101SS400

D1111SS400

D1121SS400

D1131SS400

C6880.01

Q519UNR9113J

C6890.01

C6900.01

C6910.01

C6920.01

Q5212SC4617

Q5222SC4617

Q5232SC4617

Q5242SC4617

C6940.1

R352100k

R35347k

R35427k

R3551.5k

R356270

C6970.01

R357330k

C6980.01

R3581.5k

C7000.01

R361150k

R362150k

R3634.7k

C7010.01

R36522k

R366100k

R367220k C702

0.1

C7030.47

R369330

Q526UNR9113J

C7050.1

R34710k

R34610k

R17210k

R37010k

Q527UNR9113J

R372100k

C7060.001

R37410k

R37510k

R37622k

C7080.22

Q529UNR9213J

C7090.1

R3774.7k

R378100k

Q5302SC4617

Q5312SC4617

C7110.1

C7120.1

C7140.01

C7150.01

C716470p

R39027k

R39110k

C7180.01

R39247k

C7190.001

Q5322SK1069

R39622k

R397100k

R398100k

D121 DAP222

D119DAP222

D117DAP222

C7400.01

C7440.01

FI3 FL-29319.650 MHz

1

3

C7580.001

R43215k

L1043.3µH

C7590.001

R4331k

C7600.001

C7610.001

IC17TA31136FN

1OSCIN2OSCOUT3MIXOUT4

VCC5

IFIN6

DEC7FILOUT8

FILIN9

AFOUT

10QUAD

11IFOUT

12 RSSI

13 N-DET

14 N-REC

15 GND

16 MIXIN

R43547k

C7640.001

R43722k

L105LS-510

C76510p

C7660.01

R438100kC768

470pC769470p

R4391.5k

R44047k

C7700.01

R441680

R44215k

C7710.01

C7720.001

R443470

C7730.1

R4441k

C7740.01

C77510

C7760.22

D1341SS400

D1351SS400

R44510k

C7770.01

FI8CFWM450E

I OC7780.01

R44610k

D1361SS400

D1371SS400

C7790.01

C7800.1

R447220

R4482.2k

C781220p

C782220p

R4492.2k

L106470µH C783

0.1C7840.01

R45010k

C78515p

R452150k

Q544XP6501

123

4 5 6

Q545XP6501

123

4 5 6

C786150p

R454100k

R4551k C788

0.01

R45747k

R4581M

R459470k

C7890.001

C79110

C7920.01

R46110k

C762100p

Q546XP4312

123

4 5 6

C7930.01

R46310k

R46410k

R46522k

C7950.1

R4664.7k

C7960.22

Q547UNR9213J

R467100k

C75222p

R43010k

C7540.001

C7560.1

R42910k

R42810k

D131MA2S077

C75322p

L1022.7µH

D133MA2S077

FI7 FL-29319.650 MHz1

3 4 D132MA2S077

D130MA2S077

C7570.1

D115RB876W

D116RB876W

C8670.01

D165MA2S728

C7410.01

C8690.01

C8700.01

C8710.01

CP1

CP2

FI2CFWM450E

I

Q44XP4312

X1 CR-59319.200 MHz

Q5562SC4617

C8770.01

R513220k

R5142.2k

D171HVC350B

R515100k

C8780.01

R516100k

C87910p

C4240.01

R5171k

R5181k

D58MA2S077

D59 MA2S077

D60MA2S077D61

MA2S077

IC2TA31136FN

1OSCIN 2OSCOUT 3MIXOUT 4VCC 5IFIN 6DEC 7FILOUT 8FILIN9 AFOUT

10 QUAD

11 IFOUT

12 RSSI

13 N-DET

14 N-REC

15 GND

16MIXIN

Q534XP1113

1

2

34

5

Q535XP1113

1

2

34

5

Q553XP1113

1

2

34

5

C98470p

C99470p

D172MA2S728

C8800.001

C7670.22

D138MA2S728

D57MA2S728

R5194.7k

C8810.001

L21LS-510

Q525XP6501

123

4 5 6

C8820.001

C8840.001

C8850.001

C873220p

C87418p

R203100

R2041k

R209680

R36220k

R427100

R4251k R426

680

R431220k

R52510

R52610

R52710

C8890.1

R3733.9k

C7070.001

C7100.001

D114MA2S728

R303.3k

R179150k

R39427k

R39322k

C7170.1

C7200.01

C8900.1

R4623.9k

C7940.001

C7970.001

D139MA2S728

R4513.3k

R453150k

C7900.01

Q52SC5006

Q5422SC5006

FI6CFWS450K3

I

R359 220k

R3602.2k

C7040.01

Q5282SC5006C893

0.01

R529470

R5304.7k

C8940.01

CP11

CP12

IC22CD4094BPWR

1 STR2 D3 CLK4 Q15 Q26 Q37 Q48 GND 9QS

10Q’S

11Q8

12Q7

13Q6

14Q5

15OE

16V+

IC12CD4066BPWR

1 I/O12 O/I13 O/I24 I/O25 CONT26 CONT37 VSS 8I/O3

9O/I3

10O/I4

11I/O4

12CONT4

13CONT1

14VDD

IC21CD4066BPWR

1I/O12O/I13O/I24I/O25CONT26CONT37VSS 8I/O3

9O/I3

10O/I4

11I/O4

12CONT4

13CONT1

14VDD

C8960.01

IC14M62366GP

1 VSS2 AO33 AO44 AO55 AO66 AO77 AO88 AO99 AO1010VDD

11VCC

12AO11

13AO12

14DO

15LD

16CLK

17DI

18AO1

19AO2

20GND

IC20 M62366GP1 VSS2 AO33 AO44 AO55 AO66 AO77 AO88 AO99 AO1010 VDD 11VCC

12AO11

13AO12

14DO

15LD

16CLK

17DI

18AO1

19AO2

20GND

R52047

R52147

R62180

R434180

R3791.5M

R3802.7k

R381330 R382

1.5k

R3831.5k

R38447k

R385100k

R3862.2k

R3872.2k

R3882.2k

R3892.2k

R4151.5M R414

12kQ5402SC5006

R5031.5M

R50512k

Q5552SC5006

R552.2k

R4362.2k

Q543UNR9113J

Q41UNR9113J

R5282.2k

R53656

C745470p

R53756

C755470p

L1344.7µH

R5123.9k

C87568p

C87656p

C699220p

R36456k

R36815k

C686390p

C687390p

R54215k

R1744.7k

C922150p

SSBC

SS

BC

A_W

FM

C A_ANLC

A_R

SS

I

A_R

3V

A_D

ET

SS

B

A_D

ET

SS

B

A_DETAM

A_D

ET

AM

A_D

ET

FM

SSB3V

SSB3VSSB3VSSB3V

SSB3V SSB3V

SS

B3V

SS

B3V

SSB3V

SS

B3V

SSB3V

A_DET

A_R3V

A_R

3V

A_WFMC

A_R3V

A_AMC

A_A

MC

A_WFMC

A_W

FM

C

A_NFMC

A_NFMC

A_AMC

A_AMC

SSBC

BF

O

A_A

MC

SS

BC

CLKD

LD1

NBC

A_R3V

B_R

SS

I

B_N

OIS

E

B_RSSI

B_R

SS

I

B_NOISE

B_N

OIS

E

B_R3V

B_R3VB_R3V

B_R3VB_R3V

B_R3V

B_R3VB_R3V

B_R

3V

B_R3V

B_R3V

B_R3V

B_WFMC

B_AM FM

CLK

LD2

B_A

MC

B_A

M F

M

A_A

NLC

B_A

TT

C

B_W

FM

C

A_T

RA

C

A_N

FM

C

A_3

00M

C

A_V

HF

C

A_U

HF

C

A_A

TT

C

B_U

HF

CB

_GC

B_8

00M

C

B_V

HF

C

B_T

RA

C

AT

T

ATTATTATT

B_A

NLC

B_DET

B_R3V

A_R3V A_R3V

A_N

OIS

E

B_WFMC

B_W

FM

C

+3S

ST

R2

D

DD

D

CLK

DO

WN

_CO

NV

2GLO

1GLO

AN

TS

WA

NT

SW

BP

S

NB

C

A_V

CO

3

B_AMC

B_A

NLC

A_W

FM

C

AP

S

B_V

CO

1

A_R

3V

A_R3VA_R3V A_R3V

A_R3VA_R3V

A_R3V

A_R3V

A_R3V

A_R3V

A_R

3VA

_R3V

A_R3V

3rd_Lo

DET_OUT

AGC

AGCAGCAGC

AG

CA

GC

ANL_CONT

AM_DET

WFM_CONT

AM/NFM CONT AM/NFM CONTAM/NFM_CONT

WFM CONTWFM_CONT

AM MODE

WFM_CONT

WFM_CONTWFM_CONT

19.200 MHz

+3S+3S

+3S +3S

+3S

+3S

+3SFSET

OSC

C4020.001

HJ2

GNDGND

12345678

HJ3

1122334455667

7

HJ8

112233445566

HJ4

112233445566

HJ5

1122334455

HJ9

1 12 23 34 45 5

to LOGIC unit J5

C90647p

C90747p

C90847p

R53210

C909100

D179 1SS400

C9130.001

C9140.001

C9160.001

C9170.001

B_R3V

PLLDSTBPLLDATAPLLCK

PLLCK PLLCK

PLLDSTB

A_R3V A_R3V

PLLCSTBPLLDATA

+3V

OSCGND

PLLCK

+3V

OSCGND

PLLASTB PLLASTBGND

PLLDATA PLLDATA

BPSGND

GND

APS APS

GND

GND

A_VCO2A_VCO3

A_R3V

A_VCO1

OSC OSC

+3V

+3V

+3V

A_VCO2A_VCO3

A_VCO1

+3V

+3V

APS

VP VP

B_RXV B_RXV

C_VCO OUT C_VCO OUT

A_VCO OUT A_VCO OUT

B_VCO OUT B_VCO OUT

HJ6

to 1STBVCO BOARDJ2

to 2NDDVCO BOARDJ2

to 2NDDVCO BOARDJ1

to 1STBVCO BOARDJ1

to 1STAVCO BOARDJ2

to 2NDCVCO BOARDJ2

to 2NDCVCO BOARDJ1

to 1STAVCO BOARDJ1

12345678

C90247p

C90347p

C90447p

C90547p

C9180.001

R541150

B_VCO1B_VCO1B_VCO2B_VCO3B_VCO4

B_VCO2B_VCO3B_VCO4

+3V

+3V

+3V

D_VCO OUTD_VCO OUT

A_VCO2A_RSSI

A_VCO1

BFO

PLLCSTB

PLLESTB

PLLBSTB

VP

PLLASTB

A_R3V

B_R3V

B_R

3V

+3V

B_R

3V

+3V

B_R

3V

B_NOISEB_NOISE

B_RSSIB_RSSI

A_DET

B_DET

DD

A_NOISE

+3S+3S

+3S

EAR

LD1LD1

CLKCLK

B3C

B2C

B1C

HFC

A_VCO2A_RSSI

A_VCO1

BFO

PLLESTB

A_DET

B_DET

A_NOISE

EAR

B3C

B2C

B1C

HFC

STR2STR2

PLLDATA

PLLCK

B_VCO4

B_VCO2

B_VCO3

LD2LD2

21

1

22

2

23

3

24

4

25

5

26

6

27

7

28

8

29

9

30

10

31 11

32

12

33

13

34

14

35

15

36

16

37

17

38

18

39

40

19

20

HJ7

1122334455667

7

C9200.001

VPGND

VP

PLLCK

PLLBSTB PLLBSTBPLLDATA

OSC OSCBPS BPS

B_GC

B_800MC

B_VHFC

A

B_UHFC

O

O

4

2

2

OS

C

OSC

OS

C

OSC OSC

A_D

ET

FM

B

Explanatory notesVOLTAGE LINE

RX LINE

Page 60: ICOM IC R20 Service Manual

11 - 3

C1770.001

D36MA133

C880.001

R26

1k

C1521

Q262SJ144

R31

47k

Q31HAT1023R

5 D

6 D

7 D

8 D 1S2S3S4G

C10633

Q82SA1588 IC5

TA31056F1IN 2

VREF 3NF 4COMP5 GND

6 OUT

7 TB

8 VCC

C10.1

Q25XP6501

1 2 3456

C1140.001

R564.7k

C1780.001

IC9R1111N321B

1VDD 2GND 3CE4

NC

5VOUT

Q332SB1132

C1130.1

C624.7

C3747p

C4033

C680.001

C1240.1

C1110.1

R14215k

C970.1

R9447k

C390.1

C1830.0047

C690.001

IC11TC7W04FU

1234 5

678

EP8

C450.1

C42100p

R4 10k

D29SB07-03C

EP6

AFOUT

AFOUT

AFOUT

AFOUTAFOUTAFOUT

AF

OU

T

AFOUT

GND

C1200.1

C330.001

C930.001

C1730.001

R847k

R710k

C1720.1

C610.001

C1160.1

C70.01

D35MA2S728

C444.7

Q142SA1588

C1090.1

C1410.001

R129180k

Q7XP1501

1 2 3

5

C34220

Q172SA1588

R9833k

C1580.1

EP10

C434.7

R12110

C890.001

C1040.1

R127470k

Q13XP6501

1 2 3456

R64470

EP9

C1820.001

C510.001

C160.001

C1250.1

C1020.1

IC8R1111N321B

1VDD 2GND 3CE

4NC

5VOUT

R1641M

C310.47

R7447k

R137100k

R13682k

D221SS372

R5410k

C240.001

Q92SB1132

R150 150k

R15139k

R16639k

C1510.001

C1540.1

C142100p

C1000.022

C940.0022

R168100k

C160330p

C1311

C1351

C1431

C1491

C1261

C1321

C1381

C1441

C1620.1

Q282SC4617

C1181

D211SS400

R1472.2M

Q232SC4617

R111k

R24

1k

C910.001

R126470k

R148 150k

R149 39k

R16539k

C990.022

C920.0022

C1080.1

C1390.001

C140100p

C1500.001

C1530.1

C870.001

C1700.1

C1560.1

R1631M

Q24XP6501

1 2 3456

R14115k

C1190.1

C1171

C1150.1

R11810

C1010.1

C1120.1

C1030.1

Q222SC4617

R128180k

D201SS400

R13482k

C1220.1

C1230.1

C1100.1

Q272SJ144

R1542.2M

C840.0047

C950.1

C860.1

Q192SJ144

R1142.2M

R1171M

C960.1

R169100k

C161330p

Q30 2SB1201

R18512

R18612

Q35UNR9213J

R1891kD28

MA2S111

C1760.1

R15782k

R13982k

R16282k

R14082k

R143470k

R144470k

R11512k

R11612k

R113120k

R112120k

C127470p

C128470p

C1450.015

C1460.015

R131820k

R133820k

R70

_JP

W

R57 JPW

R71

_JP

W

S3

S2

S18

S9 S14 S20

S4 S10

S8

S15

S13

S21

S1 S7

S19

CP3

CP4

J6

IC3M30620MCP-130GP [USA] only

M30620MCP-129GP [OTHER]

1P

94/D

A1/

TB

4IN

2P

93/D

A0/

TB

3IN

3P

92/T

B2I

N/S

OU

T3

4P

91/T

B1I

N/S

IN3

5P

90/T

B0I

N/C

LK3

6B

YT

E7

CN

VS

S8

P87

/XC

IN9

P86

/XC

OU

T10

RE

SE

T11

XO

UT

12V

SS

13X

IN14

VC

C15

P85

/NM

I16

P84

/INT

217

P83

/INT

118

P82

/INT

019

P81

/TA

4IN

/U20

P80

/TA

4OU

T/U

21P

77/T

A3I

N22

P76

/TA

3OU

T23

P75

/TA

2IN

/W24

P74

/TA

2OU

T/W

25P73/CTS2/RTS2

26P72/clk2/TA1OUT

27P71/RXD2/SCL

28P70/TXD2/SDA

29P67/TXD1

30P66/RXD1

31P65/CLK1

32P64/CTS1/RTS1

33P63/TXD0

34P62/RXD0

35P61/CLK0

36P60/CTS0/RTS0

37P57/RDY/CLKOUT

38P56/ALE

39P55/HOLD

40P54/HLDA

41P53/BCLK

42P52/RD

43P51/WRH/BHE

44P50/WRL/WR

45P47/CS3

46P46/CS2

47P45/CS1

48P44/CS0

49P43/A19

50P42/A18

51P

41/A

17

52P

40/A

16

53P

37/A

15

54P

36/A

14

55P

35/A

13

56P

34/A

12

57P

33/A

11

58P

32/A

10

59P

31/A

9

60V

CC

61P

30/A

8(/-

/D7)

62V

SS

63P

27/A

7(/D

7/D

6)

64P

26/A

6(/D

6/D

5)

65P

25/A

5(/D

/D4)

66P

24/A

4(/D

4/D

3)

67P

23/A

3(/D

3/D

2)

68P

22/A

2(/D

2/D

1)

69P

21/A

1(/D

1/D

0)

70P

20/A

0(/D

0/-)

71P

17/D

15/IN

T5

72P

16/D

14/IN

T4

73P

15/D

13/IN

T3

74P

14/D

12

75P

13/D

11

76 P12/D1077 P11/D978 P10/D879 P07/D780 P06/D681 P05/D582 P04/D483 P03/D384 P02/D285 P01/D186 P00/D087 P107/AN7/KI388

P106/AN6/KI289 P105/AN5/KI190

P104/AN4/KI091 P103/AN392 P102/AN293P101/AN194 AVSS95P100/AN096 VREF

97 AVCC98

P97/ADTRG/SIN4

99

P96/ANEX1/SOUT4

100

P95/ANEX0/CLK4

S5 S11 S16 S22

S6 S12 S17 S23

D121SS400

D91SS400

D61SS400

D31SS400

R1010k

R947k

IC1CAT24WC256

1 A02 A13 NC4 VSS 5SDA

6SCL

7WP

8VCC

C2

0.00

1C

3 0.

001

C4

0.00

1C

5 0.

001

C6

0.00

1C

8 0.

001

C9

0.00

1C

10 0

.001

C11

0.0

01

C12

0.0

01C

14 0

.001

R35

1k

R42

1k

R51

1k

R61

150

kR

60 1

50k

R59

150

kR

58 1

50k

C130.1

C230.1

D231SS372

D241SS372

D251SS372

R22

JP

W

R77 1k

R72

_JP

WR

73_J

PW

EP7

C3682p

R66 1k

R68 1k

R1982

DS2

Q12SC4617

DS3

R2382

DS4

R1482

DS1

R2982

R4982

R5382

R5582

Q42SC4617

DS5

DS1–DS9_SML-512UW

DS6 DS7

R3882

DS8

C260.001

Q52SC4617

R33100k

R192180k

R193100k

C1750.1

R36

4.7

k

D33MA8027

Q29UNR9213J

D32MA2S111

R18047k

C1800.001

R191100k

C1740.1

R19047k

C540.1

R961M

R85100

C730.01

C530.01

C74470p

C500.1

Q11UNR9113J

D18HN2V02H-B

C490.1

R8410k

R915.6k

C470.1

Q122SC4617

C461

R1015.6k

C580.1

C600.1

Q162SC4617

C571

R9510k

IC7SM6451B

1 RSTN2 ADRS13 ADRS24 DVDD5 LOUT6 LIN7 AVDD8 VRL 9VRR

10AVSS

11RIN

12ROUT

13DVSS

14MLEN

15MCK

16MDT

C550.001

R904.7k

C520.001

C480.001

R100JPW

C640.001

C630.001

C590.001

C850.1

X1CR-717

R2710

R281M

C2215p

C270.01

R8247k

R7647k

R67 1k

R8347k

R43

15k

IC4TC7W04FU

1234 5

678

R4010k

R3410k

R4112k

R15100k

D131SS400

Q32SA1586

Q62SC4116

R20100k

R3910k

D311SS400

D301SS400

D261SS400

D271SS400

C410.1

IC2BD5228G

1 OUT2 VDD3

VSS4

NC

5CD

J3

J8

1

2

3

C1710.01

R178390k

C1670.0022

R1722.2M

C157470p

C148680p

R161470k

R1602.2M

R156180k

R146100k

C134820p

C137270p

R155180k

R125470k

C1680.0018

R175100k

C164330p

C1690.01

R176390k

C1650.0022

R1702.2M

C155470p

C147680p

R159470k

R1582.2M

R153180k

R145100k

C133820p

C136270p

R152180k

R124470k

C1660.0018

R174100k

C163330p

R135100k

S26

CP5

CP6

CP1

CP2

Q36_2SC4617

R198100k

C1850.001

Q372SA1588

C1860.001

C1870.001

C1880.001

DS9

R20282

R321k

R121k

C383.3

C7010

C8010

C8222

C8322

C1594.7

123456789

C10710

C1054.7

C984.7

C904.7

C290.1

R20382

R20482 R205

82

R20682

R301k

R89470k

R99470k

R201470k

R2008.2k

R104470k

R1056.8k

R86100k

R884.7k

C770.001

IC6SN74AHC1GU04DBVR

11

2 23 3 4

5

C1890.001

DS11SML-512UW

R199220

R111JPW

C1900.1

Q102SA1362

Q152SA1362

Q38XP4601

1 2 3

456

R207100kR208

100k

R12210k

R10333k

R179180k

R177180k

R8739k

IC14TC7S08FU

123 4

5

IC15TC7S08FU

123 4

5

R209100k

C1910.1

R2_10k

R3_10k

R5_10k

R6_10k

R17

10k

R18

10k

R6310k

X2CSBFB453K

EP12_CV1081

Q322SC4617

R1831k

IC12LM2904PWR

1234 5

678

IC13LM2904PWR

1234 5

678

R1821.2k

R1871k

R188150

R210100k

R106JPW

R213JPW

R214JPW D34

SB07-03C

R216JPW

R215JPW

Q20UNR9115J

C301 C35

1

R13.3k

R21

3.3

k

R25

3.3

k

R123820

R120820

R1071M

R108470k

D14HVC376B

C28470p

R52100k

R62100k

L110µH

C1941

R16710k

R11082k

R11912k

R69 10k

R211470

R212470

R217100k

R194100k

R195180k

R18168

R18482

R1966.8

R1976.8

Q34 UNR9215J

R931M

R971M

C560.01

C650.01

R130180k

R132180k

EP13MZA2010D121C

Q21UNR9115J

R45

10

D8MA2S728[USA] only

D5MA2S728[USA] only

D2MA2S728[SEA], [EXP], [CAN]only

D11MA2S728[EUR] only

C1960.1

R47_2.2M

MP5

A_VSCAF

CHGS

A_VCO2

LD2B_VCO2

B_RSSI

B_VCO3B_VCO4

EC

KE

SIO

PLL

DS

TB

PLL

CK

PLL

ES

TB

PLL

CS

TB

PLL

AS

TB

KR1

KR4

KR5

KR

0K

R1

KR

2K

R3

KS

0K

S1

KS

2K

S3

KS3KS2KS1KS0

KR

5

KR3

KR2

KR0

A_RTONE

B_VSCAFB_RTONE

B_CTONEA_CTONE

BU

SY

SC

LK

A_NOISEB_NOISE

B_AF_THURUB_AF_THURU

A_RTONE

B_CTONE

TEMPBATTINHVIN

HVDET

TEMP

B_AMUTEB_AMUTE

CN

VS

S

BEEPBEEP

BEEPBFO_SHIFT

BUSYSCLKRXDTXDRESETCNVSS

BUSYSCLKRXDTXDRESETCNVSS

HVDET

BFOC

BF

O

CKO

CKO

+3SC

CK

DATACK

AFON

A_CTONE

D

CLK

DCLK

RE

SE

T

RESET

A_TCON

B_TCON

B_RTONE

EAR

A_AINA_AIN

A_A

IN

B_AINB_AIN

AOUTAOUT

B_R3C

A_R3C

VRSTB

+3SCLIGHT

B3C

I1

I0 I1

VRSTB VRSTB

B_TCON

KR

4

VOL_UP_DOWN

CK

DATADATA

DATA

DA

TA

POWER

CIV

_IN

CIV

_OU

T

CPU3V

CPU3V

CP

U3V

CP

U3V

CP

U3V

CPU3VCPU3V

CPU3V

CPU3V CPU3V

HVIN

BATTIN

CPU3V

CPU3V

CP

U3V

CHGC

CIV

_IN

A_RSSI

RE

C

C81 1C79 1C78 1C76 1C75 1C184 1

C71 1

C67 1C66 1

C72 1

J9

1234567891011121314151617181920212223 25

24

LCD_CSLCD_RESET

LCD_RSCK

DATA

PCON

LIG

HT

LIG

HT

LIG

HT

A_VCO1

PLL

BS

TB

SQL

A_AF_THURUB_AMUTE

AFON

CIV_OUTCIV_IN

SUB_3C

RX

D

RXD

TX

D

TXD

B_D

CK

A_D

UD

A_D

CK

B_D

UD

A_VCO1

REC

CHGSCHGC

LD1B2C

B1CHFC

PLLDATASTR2

PCON

B_A

F_T

HU

RU

A_R

3C

A_T

CO

NLC

D_C

S

BF

OC

B_R

3C

LCD

_RE

SE

T

LCD

_RS

A_VCO2

A_AF_THURU

A_AF_THURU

A_VSCAF

A_RSSI

B_VSCAF

CPU3V CPU3V

CP

U3V

A_R3V

+3S

+3S

VP

VP

BFO_SHIFT

DA

TA

C

CK CK

DATA

D

CLK

DA

TA

C

CLS

1

PO

WE

R

CLS

0

+3V

+3V

+3V

+3V +3V

VCC

VCC

A_DET

A_R3V

A_R3VA_R3V

B_DET

B_R3V

B_DET

A_DET

B_DET

A_DET

B_TCON

B_RTONE

A_R3V

A_TCON

A_RTONE

B_R3V

BFO

PLLCSTB

PLLESTB

PLLBSTB

VP

PLLASTB

A_R3V

B_R3V

B_NOISE

B_RSSI

+3V

A_DET

B_DET

D

A_NOISE

+3S

EAR

LD1

CLK

B3C

B2C

B1C

HFC

STR2

PLLDATA

PLLCK

B_VCO4

B_VCO2

B_VCO3

LD2

A_VCO2A_RSSI

CKDATA

CKDATA

CK

DA

TA

CKDATA

A_VCO1

BFO

PLLCSTB

PLLESTB

PLLBSTB

VP

PLLASTB

A_R3V

B_R3V

B_NOISE

B_RSSI

+3V

A_DET

B_DET

D

A_NOISE

+3S

EAR

LD1

CLK

B3C

B2C

B1C

HFC

STR2

PLLDATA

PLLCK

B_VCO4

B_VCO2

B_VCO3

LD2

C1790.001

C1810.001

C1920.1

B_CTONE

A_CTONE

DW MAIN

1

4

7

<< >> PLAY REC

SCOPE

BAND VFO MODE MR

B3 B2 B1 B0

POWER

EP3

EP4

S25

1COM

2A

3B

S24

1COM

2A3B

EP1

EP2

C1847p

C2047p

C1947p

C2147p

B_DCK

B_DUD

A_DCK

A_DUDA DIAL

B DIAL

R13120k (HJ9)

123456

(HJ8)

1234

C1930.1

TXD

A_AINB_AIN

AOUT

SQL

SUB_3C

RXD

VOL_UP_DOWN

TXD (CPU_TX)

A_AINB_AIN

GND

AOUT

SQL

SUB_3C+3V

RXD (CPU_RX)

VOL_UP_DOWN to RECunitJ7

to RECunitJ6

EXT SP

EXT DC

INT SP

B GND

Li+

Li–

S

REC

J5

21

1

22

2

23

3

24

4

25

5

26

6

27

7

28

8

29

9

30

10

31 11

32

12

33

13

34

14

35

15

36

16

37

17

38

18

39

40

19

20

to RF unit J1

to_LCDDS12M3-0243TIY

4

Explanatory notesVOLTAGE LINE

RX LINE

RECORDING LINE

PLAYBACK LINE

2 3

5 6 0

8 9 .

4

LOGIC UNIT

D5D2

B_R3V

B_R

3V

+3S

+3S

+3S

+3S

+3V

+3V+3V

+3V

+3V +3V +3V

+3V

+3V

B_R

3V

Approx. 12V

3.2V

3.6V

3.1V

3.3V_SQL_OPEN

3.1V3.0V

3.0V3.0V

3.2V

3.7V

TSQL/DTCS/VSC ON2.9V

3.0V

3.0V

2.9VTSQL/DTCS/VSC ON

3.6V3.2V

3.1V

2.8VCW/BFO_ON

PLLDSTBPLLDSTB

3.1V

11-2 LOGIC UNIT

Page 61: ICOM IC R20 Service Manual

11 - 4

11-3 REC UNIT

IC9SN74AHC1G66HDBV

IC8SN74AHC1G66HDBV

IC7ML2302TB

IC6K9F5608U0CIC4

SN74AHC1G02DCK

IC5SN74AHC1G32DCK

IC2M30620FCPGP

IC10R1111N321B

IC1BD5228G

IC3FT245BM

Q1UNR921NJ

Q2UNR9119J

REC UNIT

J2

67

89

12345

R7 27R6 27

EP1

EP3

EP4C10.01

D+D–VBUS VBUS

VBUSVBUS

VBUS VBUS

VBUSVBUS

VBUS 1 VDD2 GND3 CE 4NC

5VOUT

R110k

HJ1

123456789

BUSY

RXDTXD

CNVSS

SCLK

GND

RESET

EPM

SUB_3V

SU

B_3

V

SUB_3V

BUSY

RXDTXD

CNVSS CNVSS

SCLKBUSY

BUSY

RXD

RXD

TXD

TXD

SCLK

SCLK

RESET RESETRESET RESET RESET

RE

SE

T

EPM

BU

SY

RX

DT

XD

SC

LK

EP

M

EPM

R1547k

R847k

R1947k

C50.01

R910k

C210

C30.01

1 OUT2 VDD3 VSS 4NC

5CD

R11470

X1 CR-6726.000 MHz

C633p

C733p

C80.1

R12 330

C120.01

C100.1

EESKEEDATAVCCRESET#RSTO#3V3OUTUSBDPUSBDM GND

D7D6D5D4D3D2D1

25D

0

26V

CC

27X

TIN

28X

TO

UT

29A

GN

D

30A

VC

C

31T

ES

T

32E

EC

S

RSTO

C90.033

12345678

9G

ND

10P

WR

EN

#11

SI/W

U12

RX

F#

13V

CC

IO14

TX

E#

15W

R16

RD

#

R13 1.5k

1718192021222324

A_SQL

A_S

QL

A_SQL

B_SQLA_SQL A_SQLB_SQL

B_SQL

B_SQL

B_S

QL

B_SQL

SUB_3V

D0D1D2D3D4D5D6D7

D0D0D1D2D3D4D5D6D7

D1D2D3D4D5D6D7

C280.01

C27100 C26

0.01

C250.01

C180.01

J6

1234

123 4

5

123 4

5

S1

SQLR18330k

S2

S3

UP

DOWN

J7

123456

GNDAOUTAOUT

AO

UT

B_AINB_AINA_AINA_AIN

A_A

IN

CPU_RXCPU_TX

CPU_RXCPU_TX

+3V+3V

toLOGIC unitHJ9

toLOGIC unitHJ8

VOL_UP_DOWNVOL_UP_DOWN

VO

L_U

P_D

OW

N

VOL_UP_DOWN VOL_UP_DOWN

SQLSQL

SQ

L

SQL SQL

SUB_3CSUB_3CSUB_3C

SUB_3C

C231

C220.01

C241

33343536373839404142434445464748

AV

DD

SG

LOU

TLI

NM

OU

TM

INA

GN

DT

ES

T9

AO

UT

SP

INS

PO

UT

–S

PO

UT

+N

CN

CN

CA

GN

D

AVDDSPVDD

CB2CB1

VRDGND

FIFOSTRESETCBUSY

CHEMPMIDFUL

DVDDWRRD

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

C160.01

R16470k

C1718p

C190.01

R17150k

D0D1D2D3D4D5D6D7DVDDTEST2TEST3TEST4TEST5TEST6TEST7TEST8

123456789

10111213141516

TE

ST

0X

TX

TV

OX

OIO

RIO

WD

RE

QL

DA

CK

LD

GN

DV

CK

AD

SD

DA

SD

SIO

CK

BU

SY

D/CCS

49505152535455565758596061626364

C2022p

C2122p

X2 CR-70816.384 MHz

D0D1D2D3D4D5D6D7

D4

D3D2D1D0

D7D6D5

252627282930313233343536373839404142434445464748

NCNCNCNC

I/O0I/O1I/O2I/O3NCNCNC

VSSVCC

NCNCNC

I/O4I/O5I/O6I/O7NCNCNCNCNC

NCNCNCNCGNDR/BRECENCNCVCCVSSNCNCCLEALEWEWPNCNCNCNCNC

123456789

101112131415161718192021222324

C150.01

C140.01

C130.01

1 A2 B3 GND 4Y

5VCC

1 A2 B3 GND 4Y

5VCC

R21100k

R22100k

EMPMIDFUL

EMPMIDFUL

RD

RD

RD

RD

RD

WR

WR

WR

RD

WR

WR

EMP

EM

P

MID

MID

FUL

FU

L

RD

RD

WR

WR

WR

CS2

CS2

CS2

CS1 CS1CS0

EPM

26272829303132333435363738394041424344454647484950

P72/clk2/TA1OUTP71/RXD2/SCLP70/TXD2/SDA

P67/TXD1P66/RXD1P65/CLK1

P64/CTS1/RTS1P63/TXD0P62/RXD0P61/CLK0

P60/CTS0/RTS0P57/RDY/CLKOUT

P56/ALEP55/HOLDP54/HLDAP53/BCLK

P52/RDP51/WRH/BHEP50/WRL/WR

P47/CS3P46/CS2P45/CS1P44/CS0P43/A19P42/A18

P94

/DA

1/T

B4I

NP

93/D

A0/

TB

3IN

P92

/TB

2IN

/SO

UT

3P

91/T

B1I

N/S

IN3

P90

/TB

0IN

/CLK

3B

YT

EC

NV

SS

P87

/XC

INP

86/X

CO

UT

RE

SE

TX

OU

TV

SS

XIN

VC

CP

85/N

MI

P84

/INT

2P

83/IN

T1

P82

/INT

0P

81/T

A4I

N/U

P80

/TA

4OU

T/U

P77

/TA

3IN

P76

/TA

3OU

TP

75/T

A2I

N/W

P74

/TA

2OU

T/W

P73

/CT

S2/

RT

S2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

P12/D10P11/D9P10/D8P07/D7P06/D6P05/D5P04/D4P03/D3P02/D2P01/D1P00/D0P107/AN7/KI3P106/AN6/KI2P105/AN5/KI1P104/AN4/KI0P103/AN3P102/AN2P101/AN1AVSSP100/AN0VREFAVCCP97/ADTRG/SIN4P96/ANEX1/SOUT4P95/ANEX0/CLK4

767778798081828384858687888990919293949596979899

100

C40.01

P41

/A17

P40

/A16

P37

/A15

P36

/A14

P35

/A13

P34

/A12

P33

/A11

P32

/A10

P31

/A9

VC

CP

30/A

8(/-

/D7)

VS

SP

27/A

7(/D

7/D

6)P

26/A

6(/D

6/D

5)P

25/A

5(/D

/D4)

P24

/A4(

/D4/

D3)

P23

/A3(

/D3/

D2)

P22

/A2(

/D2/

D1)

P21

/A1(

/D1/

D0)

P20

/A0(

/D0/

–)P

17/D

15/IN

T5

P16

/D14

/INT

4P

15/D

13/IN

T3

P14

/D12

P13

/D11

C110.01

51525354555657585960616263646566676869707172737475

ALE

CLE

D7D6D5D4D3D2D1D0

R1047k

PWREN PWREN

PWRENPWREN

TXE TXE

TXETXE

RXF RXF

RXF

PW

RE

N

TX

ER

XF

RXF

R_BFIFOSTCBUSY

FIFOSTCBUSY

FIFOST

FIF

OS

T

CBUSY

CB

US

Y

RESET

EMPMIDFUL

RDWR

FIFOST

CBUSY

SUB_RX

SUB_RX

SUB_TX

SUB_TX

R20100

MP1 MP2

from/toUSB jack

Explanatory notesVOLTAGE LINE

RECORDING/PLAYINGCOMMON LINE

RECORDING LINE

PLAYBACK LINE

3.1V

3.0V

Page 62: ICOM IC R20 Service Manual

11 - 5

1STAVCO BOARD

Q132SC5277

Q62SK880

Q72SC4117

IC3MB15T61UL

Q82SC5231

Q12XP1113

Q11XP1113

IC2µPC2746TB

Q32SC5006

Q22SC5006

Q12SC5006

Q92SC5231

R461k

C310.01

R49180k

C590.01

C600.01

R471k

R481k

C400.01

R243.3k

R2815k

C350.0033

C390.68

C380.68

R266.8k

C371

R25220

R278.2k

C580.1

1 2 3 4 5 6 7

C6410R53

82

C670.001 [EUR], [UK], [USA], [CAN] only

SW

B1

DO

RF

1S

W1

SW

2D

OR

F2

VP

RF

LD/F

OU

T PSGNDRFXFINRFFINRF2FINRF1

VC

CR

FG

ND

RF

VC

CS

DLED

AT

AC

LOC

KO

SC

IN

GNDOSCSWA2SWB2GNDDIGSWA1

2021222324

R231k

13141516171819

89101112

C610.1

C620.1

R50100k

R51100k

R52100k

R56 1k R56 JPW [SEA], [EXP] only

R57 JPW [SEA], [EXP] onlyR57 1k

R55 1kR55 JPW [SEA], [EXP] only

C410.001

C420.001

R30220

C440.001

R32150

R3182k

PLLASTBPLLDATA

PLLCK

VP

toRF unitHJ3

toRF unitHJ2

OSC

R29100k

C630.001

C432p

J1

1234567

GND

APS

J2

12345678

+3VA_R3V

A_VCO2A_VCO1

A_VCO3GNDGND

A_VCO_OUT

1

2

34

5

C6510

C6610

R3333

C505p

R4382k

R44220

C520.001

C530.001

1

2

34

5

R4247

R451k

C460.001

C470.001

C4910p

R4115

1 IN2 GND3 GND 4OUT 5GND 6VCC

R34220

C230.5p

C240.1

R12220

R134.7k

R148.2k

D91SV308

R384.7k

R404.7k

C560.001

R15330

L80.22µH

C180.001

R1147

C204p

C210.001

C198p

L101µH

D4HVC417C

C220.1

L927nH

3AVCO

C170.001

R5447

L50.22µH

C100.001

R647

C120.001

C140.5p

R7220

R84.7k

R98.2k

C112p

C163pL6

18nHL71µH

D3HVC417C

C130.1

2AVCO

C90.001

L10.22µH

L20.22µH

R147

C10.001

C20.001

C50.001

R2220

R34.7k

R48.2k

C70.5p

D11SV245

D21SV245

R352.7k

L315nH

L41µH

C60.1

C480.01

C33p

C44p

1AVCO

C80.1

D71SV308

R364.7k

C540.001

R5220

C150.1

D81SV308

R374.7k

C550.001

R10220

Explanatory notesVOLTAGE LINE

3.0V

2.3V

2.6V

3.0V

2.8V

3.1V

1.67V 3.0V

3.0V2.0V

1.13V

3.0V

11-4 1STAVCO BOARD

Q42SC5006

Q52SC5006

Q32SC5006

IC2µPC2746TB

Q92SC5231Q2

2SC5006

Q12SC5006

Q72SC4117 Q6

2SK880

Q122SC5277

IC3MB15T61UL

Q82SC5231

Q10XP1113

Q11XP1113

1STBVCO BOARD

C250.001

L110.27µH R16

6.8k

R17120

L1347nH

R186.8k

L1447nH

C290.001

C300.001

C450.5p

D101SV308

R394.7k

C4910p

R404.7k

C570.001

L1222nH

C260.001

C270.75p

C280.75p

D5HVC417C

R19330

4BVCO

C170.001

L80.22µH

C180.001

R1147

C204p

C230.5p

C240.1

R12220

R134.7k

R148.2k

D91SV308

R384.7k

C210.001

C560.001

L101µH

C198p

R5447

D4HVC417C

C220.1

R15470

L927nH

3BVCO

C460.001

C470.001

R4115

1 IN

2 GND

3 GND 4OUT 5GND 6VCCR34220

R3333

C505p

R4382k

R44220

C520.001

C530.001

R4247

R451k

L20.22µH

C10.001

C50.001

R48.2k

D11SV245

C90.001

L50.22µH

C100.001

R647

C120.001

C140.5p

R7220

R84.7k

R98.2k

C150.1

C112p

D81SV308

R374.7k

C550.001

L612nH

L71µH

C164p

D3HVC417C

C60.1

C130.1

2BVCO

L10.22µH

R147

C20.001

C32p

C42p

R2220

R34.7k

C70.5p

D21SV245

R352.7k

L312nH

L41µH

C480.01

R266.8k

R278.2k

1BVCO

C310.001

C371

R25220

C400.01

R461k

R49180k

C590.01

C600.01

R243.3k

R2815k

C350.0033

C390.68

C380.68

R471k

R481k

R231k

SW

B1

DO

RF

1S

W1

SW

2D

OR

F2

VP

RF

LD/F

OU

T PSGNDRFXFINRFFINRF2FINRF1

VC

CR

FG

ND

RF

VC

CS

D

DA

TA

CLO

CK

OS

CIN

GNDOSCSWA2SWB2GNDDIGSWA1

LE

2021222324

1 2 3 4 5 6 7

89101112

13141516171819

R32150

C610.1

C620.1

R50100k

R51100k

R52100k

PLLBSTBPLLDATA

PLLCK

VP

OSC

C410.001

C420.001

R30220

C440.001

R29100k

C630.001

R3182k

C432p

J1

1234567

GND

BPS

J2

+3V

B_VCO2B_VCO1

B_VCO3B_VCO4

B_VCO_OUT

B_R3V

GND

1

2

34

5

1

2

34

5

C6510

C6610

C6710

C80.1

D71SV308

R364.7k

C540.001

C580.1

C6410

R5382

R5 18022 [SEA], [EXP]

C680.001 [EUR], [UK], [USA], [CAN] only

R56 1k

R55 1k

toRF unitHJ7

toRF unitHJ6

R57 JPW [SEA], [EXP]

R56 JPW [SEA], [EXP]

R55 JPW [SEA], [EXP]

R57 1k

R10 22022 [SEA], [EXP]

Explanatory notesVOLTAGE LINE

3.0V

2.3V

2.6V

3.0V

2.8V

3.1V

1.7V 3.0V

3.0V2.0V

1.13V

3.0V

11-5 1STBVCO BOARD

Page 63: ICOM IC R20 Service Manual

11 - 6

2NDCVCO BOARD

Q42SC4617

Q1FH102

Q32SC5277

IC1MB15E03SL

C315p

R41k

1

2

34

5

6

C74p

L233nH

L322nH

C81p

C95p

C105p

R10100

C10.33

C300.001

C410p

D11SV314

C218p C5

12p

L40.22µH

C60.001

R31k

R210k

R147

L118nH

C332p

C_VCO_OUT

C_VCO_OUT

1CVCO

C310.001C32

10

R211k

GND

GNDA_R3V

A_R3V

A_R3V

APS

APSAPS

12345

J1

J2

123456

+3V

+3V

GNDOSC

OS

C

PLLDATAPLLCK

PLLCSTBPLLDATAPLLDATAPLLCKPLLCK

PLLCSTBPLLCSTB

C175p

R161k

C220.01

R17180k

C230.01

C240.01

R191k

R181k

C16470p

R956

C250.001

C260.1

1OSCI 2OSCO 3VP 4VCC 5DO 6GND 7XFIN 8FIN9 CLK10 DAT11 LE12 PS13 ZC14 L/F15 P16 R

R111k

R121k

C270.001

R1410

R15820

C214.7

C1847p

C1947p

C2047p

R131k

R22330

toRF unitHJ5

toRF unitHJ4

Explanatory notesVOLTAGE LINE

2.4V 3.0V

2.3V

1.7V

0.7V

3.0V

2.3V

11-6 2NDCVCO BOARD

2NDDVCO BOARD

Q1FH102

Q42SC4617

Q32SC5277

IC1MB15E03SL

R247k R3

330

C60.001

R41k

C10.33

C322p

C412p

C527p

D1HVC305B

L40.22µH

L122nH

C256p

R147

1DVCO

1

2

34

5

6

L322nH

R10100

L247nH

C710p

C98p

C108p

C84p

C300.001

C310.001C32

10

R211k D_VCO_OUT

D_VCO_OUT

B_R3V

B_R3V

B_R3VGND

GND

BPS

BPSBPS

J1

12345

+3V

+3V

PLLDATAPLLCK

PLLDSTBPLLDATAPLLDATAPLLCKPLLCK

PLLDSTBPLLDSTB

GNDOSC

OS

C

J2

123456

C175p

R9220

R161k

C220.01

R17180k

R181k

R191k

C230.01

C240.01

C16470p

OSCIOSCO

VPVCC

DOGNDXFIN

FINCLKDATLEPSZCL/FPR 1

23456789

10111213141516

C250.001

C260.1

C1847p

C1947p

C2047p

R111k

R121k

R131k

C270.001

R1410

R15820

C214.7

R22330

toRF unitHJ9

toRF unitHJ8

Explanatory notesVOLTAGE LINE

2.4V 3.0V

2.3V

1.7V

0.7V

3.0V

2.3V

11-7 2NDDVCO BOARD

Page 64: ICOM IC R20 Service Manual

11 - 7

DOWNCONV BOARD

Q62SC5277 IC4

MB15E03SL

Q22SC5006

Q3UNR911J

IC3µPC2757TB

Q5XP1113

Q42SC5624

Q12SC5006

IC2µPC2749TB

1001 MHz or 2002 MHz LO

R291k

C470.01

R30180k

R311k

R321k

C480.01

C490.01

C530.01

C51470p

12345678 9

10111213141516OSCI

OSCOVPVCCDOGNDXFINFIN CLK

DATLEPSZCL/F

PR

C15470p

R1456k

R15220

C16470p

R16150

C17470p

R171k

C18470p

J1

12345678

IF_OUT

RF_IN

OSC

PLLESTBPLLDATA

PLLCK

PLLESTBPLLDATA

PLLCK

GND

RF_INGND

RF_INGND

RF_INGND

GND

R1210

R1315

R1115

J2

123456+3S

+3S

+3S

+3S

DOWN_CONVD

OW

N_ C

ON

V2GLO1GLOGND

+3V

+3V

+3V +3V

C6470p

D21SV308

R34.7k

R64.7k

C44470p

C453p

C463p

C71p

IF_ O

UT

IF_ O

UT

1 RFI

2 GND

3 LO 4PS 5VCC 6IFO

C5647p

R2470

DOWN_CONV 3V

C110p

C28p

C5470p

1 IN2 GND3 GND 4OUT 5GND 6VCC

R1 180[USA], [EUR]

C48p

C36p

R54.7k

L28.2nH

L18.2nH

C4115p

C4212p

C43470p

D11SV308R4

4.7k

RF

_ IN

D71SV308

D81SV308

R234.7k

R2810

C291p

C302p

C3112p

C3222p

L93.9nH

L102.2nH

C391p

D51SV308

D61SV308

C34470p

C35470p

R261k

C362p

C37470p

C38470p

R224.7k

R274.7k

C281p

L71.5nH

L86.8nH

R251k

C2710p

C5447p

C5547p

R2127k

1

2

34

5

C92p

C110.001

R94.7k

R810k

C101p

R7330

C580.1

C82p

L30.82µH

R1047

C140.1

C19470p

C1210

C1322p

L412nH

D31SV245

C21470p

C220.33

L60.22µH

R19820

R18330

R331k

C234.7

C404p

C260.1

C50470pC52

470p

R2010

L116.8nH

toRF unitHJ10

toRF unitHJ11

Explanatory notesVOLTAGE LINE

1.7V

2.8V

2.4V

2.8V

2.6V

2.8V

2.3V

2.8V

2.2V

0.7V

11-8 DOWNCONV BOARD

Page 65: ICOM IC R20 Service Manual

12 - 1

SECTION 12 BC-156 DESKTOP CHAGER INFORMATION

SW REG CHARGCONTROLIC2:NJM2360M

Q7:2SJ377D2:SB20-03P

IC1:MM1433EVBEQ1:2SB1184

MAIN UNIT8–16VDC INVCC

CHG SELECTRL1

I SENSER1

CHG1 CHG2

TANSHI BOARD

(C) : CHASSIS PARTS(M) : MAIN UNIT(T) : TANSHI BOARD

MP3 (C)

MP3 (C)

MP3 (C)

MP3 (C)

MP2 (C)

F1 (M)

J1 (M)

WS1 (M)

F3 (M)

F2 (M)

J1 (T)

RL1 (T)

EP2 (T)

MP4 (C)

MP5 (C)

MP7 (C)

MP6 (C)MP6 (C)

MP4 (C)

MP3 (C)

MP1 (C)

MP8 (C)

UNIT abbreviations

REF. NO. ORDER NO. DESCRIPTION QTY.

[CHASSIS PARTS]

REF. NO. ORDER NO. DESCRIPTION QTY.

[ACC ACCESSORIES]

EP1 800003420 BC-123A (LS-11033-ADT) w/box SKT [EUR] 1800003430 BC-123E (LS-11030-ADT) w/box SKT [UK] 1

MP1 8930062600 2708 holder 1MP2 8110007620 2505 cover 1MP3 8810009990 Screw PH BT M3 X 8 ZK 8MP4 8930039620 Stand/leg cushion (A) 2MP5 8930051010 2308 terminal holder 1MP6 8930051020 2308 A-terminal Y490 3MP7 8930051030 2308 B-terminal 3MP8 8010019600 2505 case (D) 1

REF. NO. ORDER NO. DESCRIPTION QTY.

[MAIN UNIT]

J1 6450000410 Connector HEC0470-01-630 1

F1 5210000040 Fuse FGB 2A (FGB0 125V) 1F2 5220000020 Fuse holder S-N5051 1F3 5220000020 Fuse holder S-N5051 1

WS1 8600036620 OTHER EX2308 PD1* J04MA 1

REF. NO. ORDER NO. DESCRIPTION QTY.

[TANSHI BOARD]

J1 6510003570 Connector S09B-EH-S 1

EP2 9001602001 IRRAX 0.7 (d) L=10mm 2

RL1 6330001630 Relay A-5W-K 1

12-1 DISASSEMBLY INFORMATION

12-2 BC-156 BLOCK DIAGRAM

Screw abbreviations BT: Self-tapping PH: Pan headZK: Black

Page 66: ICOM IC R20 Service Manual

D5DWA010

CHG ON 1.2VCHG OFF 0V

MAIN UNIT

TANSHI BOARD

Q3UNR9214J

Q2DTA114EE

Q4DTA114EE

Q8DTC114EE

IC2NJM2360AM

Q72SJ377

IC1MM1433EVBE

Q12SB1184

Q5DTA114EE

Q6DTA114EE

D6SB20-03P

C70.22

C8100

C10.22

C2470

R190.15 (1W)

F3S-N5051

F2S-N5051

J1

EXT.DC IN13.5V

F1FGB 2A

1CS 2ES 3CT 4GND5 INVIN

6 V+

7 SI

8 CD

C90.22

R181k

R17680

C100.001

C3470p

D2SB20-03P

L1 HK-08S050-2010

C4470

R1647k

R15150k

C12470

R23 10

C2147

G R

DS1VRPG3349S-734

5.1v

D4MA132WK

C364.7

C50.01

131415161718192021222324

R510k

R6120k

CH

GS

WR

ES

ET

TP

1T

P2

VR

EF

GN

D1

GN

D2

AD

J1A

DJ2

AD

J3A

DJ4

TD

ET

BA

T1

BA

T2

CS

CF

BC

NT

VC

CA

DJ5

VO

UT

LED

GLE

DR

OS

CO

UT

OS

CF

B–

D3MA2S111

D1SB20-03P

R3560

R21560

C130.001

C150.001

C140.001

C160.15

C60.1

R2150

CP1

C220.1

C240.1

C250.001

C260.1

C230.001

J4

123456789

C270.001

CHGOUTCHGOUT

DET2

DET2

DET2

toTANSHI boardJ1

BATT–DET1

DET1

DET1

BATT+SW

SWSW

SW

CONT

CONT CONT

THD

C280.1

C290.001

C300.1

C310.001

C330.001

C350.001

C320.1

C340.1

R9220k

R14100k

C180.1

C190.1 C20

0.001

R1112k

R122.7k

R2256k

1 2 3 4 5 6 7 8 9 10 11 12

1

23

4

J1

123456789

R10.15

R210k

CHGOUTCHGOUT

toBC-156MAIN unitJ4

DET2

DET2

DE

T2

BATT–

BATT–

DET1

DET1 DET1

DET1

DE

T1

BATT+

BATT+

5VCONT

CO

NT

THD

TH

D

RL1A-5W-K

D11SS53

C10.047

CP1

CP2

CP3

CP4

CP5

CP6

SBATT+

SBATT–

DET1

BATT–

BA

TT

BATT+

DET2

Explanatory notesVOLTAGE LINE

Explanatory notesVOLTAGE LINE

RL1: ON 0VRL1: OFF 5.1V

13.5V (EXT DC) 5.2V5.4V

1.77 ms

3.0 Vp-pCHG ON

CHG OFF 0.6V

+

+

12 - 2

12-3 BC-156 VOLTAGE DIAGRAM

• MAIN UNIT

• TANSHI BOARD

Page 67: ICOM IC R20 Service Manual

1

F1

CP1

CP2

CP3

CP4

CP5

CP6

J4

CHGOUTCHGOUT

DET2BATT–DET1

BATT+SW

CONTTHD

1

9

to TANSHI BOARD J1

J1

THDCONT

5VBATT+DET1BATT–DET2

CHGOUTCHGOUT

9

1to BC-156 MAIN UNIT J4

12 - 3

12-4 BC-156 BOARD LAYOUTS

• MAIN UNIT (TOP VIEW)

• TANSHI BOARD (TOP VIEW)

Page 68: ICOM IC R20 Service Manual

12 - 4

• MAIN UNIT (BOTTOM VIEW)

Page 69: ICOM IC R20 Service Manual

Asia Icom Inc.6F No.68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan, R.O.C.Phone : +886 (02) 2559 1899 Fax : +886 (02) 2559 1874URL : http://www.asia-icom.comE-mail : [email protected]

Zac de la Plaine, 1, Rue Brindejonc des MoulinaisBP 5804, 31505 Toulouse Cedex, FrancePhone : +33 (5) 61 36 03 03 Fax : +33 (5) 61 36 03 00URL : http://www.icom-france.comE-mail : [email protected]

Icom France S.a

Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K.Phone : +44 (01227) 741741 Fax : +44 (01227) 741742URL : http://www.icomuk.co.ukE-mail : [email protected]

Icom (UK) Ltd.

Crta. de Gracia a Manresa Km. 14,75008190 Sant Cugat del Valles Barcelona, SPAINPhone : +34 (93) 590 26 70 Fax : +34 (93) 589 04 46URL : http://www.icomspain.comE-mail : [email protected]

Icom Spain S.L

<Corporate Headquarters>2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A.Phone : +1 (425) 454-8155 Fax : +1 (425) 454-1509URL : http://www.icomamerica.comE-mail : [email protected]<Customer Service>Phone : +1 (425) 454-7619

Icom America Inc.

Glenwood Centre #150-6165Highway 17 Delta, B.C., V4K 5B8, CanadaPhone : +1 (604) 952-4266 Fax : +1 (604) 952-0090URL : http://www.icomcanada.comE-mail : [email protected]

Icom Canada

A.B.N. 88 006 092 575290-294 Albert Street, Brunswick, Victoria, 3056, AustraliaPhone : +61 (03) 9387-0666 Fax : +61 (03) 9387-0022URL : http://www.icom.net.auE-mail : [email protected]

Icom (Australia) Pty. Ltd.

146A Harris Road, East Tamaki,Auckland, New ZealandPhone : +64 (09) 274 4062 Fax : +64 (09) 274 4708URL : http://www.icom.co.nzE-mail : [email protected]

Icom New Zealand

1305, Wanshang Plaza, Shijingshan Road, Beijing ChinaPhone : +86 (010) 6866 6337 Fax : +86 (010) 6866 3553URL : http://www.bjicom.comE-mail : [email protected]

Beijing Icom Ltd.Sopot, 3 Maja 54 PolandPhone : +48 (58) 550 7135 Fax : +48 (58) 551 0484E-mail : [email protected]

Icom Polska

1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, JapanPhone : +81 (06) 6793 5302Fax : +81 (06) 6793 0013URL : http://www.icom.co.jp/world/index.html

Communication EquipmentHimmelgeister Str. 100, D-40225 Dusseldorf, GermanyPhone : +49 (0211) 346047 Fax : +49 (0211) 333639URL : http://www.icomeurope.comE-mail : [email protected]

Icom (Europe) GmbH

Page 70: ICOM IC R20 Service Manual

S-14104MZ-C1© 2004 Icom Inc.1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan