LG RC389H

VCR+DVD RECORDERSERVICE MANUAL

MODEL: RC389H

CAUTIONBEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONSIN THIS MANUAL.

MO

DE

L : R

C389H

SE

RV

ICE

MA

NU

AL

Website http://biz.lgservice.comInternal Use Only

P/NO : AFN328967 JANUARY, 2008

1-1Copyright 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

CONTENTS

SECTION 1.........SUMMARY

SECTION 2.........CABINET & MAIN CHASSIS

SECTION 3.........ELECTRICAL

SECTION 4.........MECHANISM OF VCR PART(D-37)

SECTION 5.........RV9 LOADER PART

SECTION 6.........REPLACEMENT PARTS LIST

1-2 Copyright 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes


SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FORVCR+DVD RECORDER PRODUCTS ...................................................................................................1-3

SERVICING PRECAUTIONS ....................................................................................................................1-4 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices

THE STEPS FOR CHANGE THE OPTION CODE ............................................................................1-5

UP-DATING PROGRAM.............................................................................................................................1-6

SPECIFICATIONS ........................................................................................................................................1-8



PRODUCT SAFETY SERVICING GUIDELINES FORVCR+DVD RECORDER PRODUCTS

IMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-video service tech-nicians.When servicing this product, under no circumstances should the original design bemodified or altered without permission from LG Corporation. All components shouldbe replaced only with types identical to those in the original circuit and their physicallocation, wiring and lead dress must conform to original layout upon completion ofrepairs.

Special components are also used to prevent x-radiation, shock and fire hazard.These components are indicated by the letter x included in their component desig-nators and are required to maintain safe performance. No deviations are allowedwithout prior approval by LG Corporation.Circuit diagrams may occasionally differ from the actual circuit used. This way, imple-mentation of the latest safety and performance improvement changes into the set isnot delayed until the new service literature is printed.

CAUTION : Do not attempt to modify this product in any way. Never perform cus-tomized installations without manufacturers approval. Unauthorized modifications willnot only void the warranty, but may lead to property damage or user injury.

Service work should be performed only after you are thoroughly familiar with thesesafety checks and servicing guidelines.

GRAPHIC SYMBOLSThe exclamation point within an equilateral triangle is intended to alertthe service personnel to important safety information in the service lit-erature.The lightning flash with arrowhead symbol within an equilateral trian-gle is intended to alert the service personnel to the presence of non-insulated dangerous voltage that may be of sufficient magnitude toconstitute a risk of electric shock.The pictorial representation of a fuse and its rating within an equilater-al triangle is intended to convey to the service personnel the followingfuse replacement caution notice:CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OFFIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RAT-ING AS MARKED NEAR EACH FUSE.

SERVICE INFORMATIONWhile servicing, use an isolation transformer for protection from AC line shock. Afterthe original service problem has been corrected, make a check of the following:

FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility of adjacent com-

ponent shorts. This is especially important on items trans-ported to and from therepair shop.

2. Verify that all protective devices such as insulators, barriers, covers, shields, strainreliefs, power supply cords, and other hardware have been reinstalled per the orig-inal design. Be sure that the safety purpose of the polarized line plug has not beendefeated.

3. Soldering must be inspected to discover possible cold solder joints, solder splash-es, or sharp solder points. Be certain to remove all loose foreign particles.

4. Check for physical evidence of damage or deterioration to parts and components,for frayed leads or damaged insulation (including the AC cord), and replace if nec-essary.

5. No lead or component should touch a high current device or a resistor rated at 1watt or more. Lead tension around protruding metal surfaces must be avoided.

6. After reassembly of the set, always perform an AC leakage test on all exposedmetallic parts of the cabinet (the channel selector knobs, antenna terminals, han-dle and screws) to be sure that set is safe to operate without danger of electricalshock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THISTEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in thefollowing manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd150V AC type capacitor between a known good earth ground water pipe, conduit,etc.) and the exposed metallic parts, one at a time. Measure the AC voltage acrossthe combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plugby using a non-polarized adaptor and repeat AC voltage measurements for eachexposed metallic part. Voltage measured must not exceed 0.75 volts RMS. Thiscorresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a poten-tial shock hazard and must be corrected immediately.

TIPS ON PROPER INSTALLATION1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf

space over, or close to, a heat duct, or in the path of heated air flow.

2. Avoid conditions of high humidity such as: outdoor patio installations where dewis a factor, near steam radiators where steam leakage is a factor, etc.

3. Avoid placement where draperies may obstruct venting. The customer should alsoavoid the use of decorative scarves or other coverings that might obstruct ventila-tion.

4. Wall- and shelf-mounted installations using a commercial mounting kit must followthe factory-approved mounting instructions. A product mounted to a shelf or plat-form must retain its original feet (or the equivalent thickness in spacers) to provideadequate air flow across the bottom. Bolts or screws used for fasteners must nottouch any parts or wiring. Perform leakage tests on customized installations.

5. Caution customers against mounting a product on a sloping shelf or in a tilted posi-tion, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart.Caution the customer on the hazards of trying to roll a cart with small castersacross thresholds or deep pile carpets.

7. Caution customers against using extension cords. Explain that a forest of exten-sions, sprouting from a single outlet, can lead to disastrous consequences tohome and family.



SERVICING PRECAUTIONS

CAUTION: Before servicing the VCR+DVD RECORDER cov-ered by this service data and its supplements and addends,read and follow the SAFETY PRECAUTIONS. NOTE: ifunforeseen circumstances create conflict between the follow-ing servicing precautions and any of the safety precautions inthis publications, always follow the safety precautions.Remember Safety First :

General Servicing Precautions1.Always unplug the VCR+DVD RECORDER AC power cord

from the AC power source before:(1) Removing or reinstalling any component, circuit board,

module, or any other assembly.(2) Disconnecting or reconnecting any internal electrical

plug or other electrical connection.(3) Connecting a test substitute in parallel with an electrolyt-

ic capacitor.Caution : A wrong part substitution or incorrect polarityinstallation of electrolytic capacitors may result in anexplosion hazard.

2.Do not spray chemicals on or near this VCR+DVDRECORDER or any of its assemblies.

3.Unless specified otherwise in this service data, clean elec-trical contacts by applying an appropriate contact cleaningsolution to the contacts with a pipe cleaner, cotton-tippedswab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication ofcontacts is not required.

4.Do not defeat any plug/socket B+ voltage interlocks withwhitch instruments covered by this service manual might beequipped.

5.Do not apply AC power to this VCR+DVD RECORDER and/ or any of its electrical assemblies unless all solidstatedevice heat sinks are correctly installed.

6.Always connect the test instrument ground lead to an appro-priate ground before connecting the test instrument positivelead. Always remove the test instrument ground lead last.

Insulation Checking ProcedureDisconnect the attachment plug from the AC outlet and turnthe power on. Connect an insulation resistance meter (500V)to the blades of the attachment plug. The insulation resistancebetween each blade of the attachment plug and accessibleconductive parts (Note 1) should be more than 1Mohm.Note 1 : Accessible Conductive Parts include Metal panels,Input terminals, Earphone jacks,etc.

Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damagedeasily by static electricity. Such components commonly arecalled Electrostatically Sensitive (ES) Devices. Examples oftypical ES devices are integrated circuits and some field effecttransistors and semiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor componentor semiconductor-equipped assembly, drain off any electro-static charge on your body by touching a known earthground. Alternatively, obtain and wear a commercially avail-able discharging wrist strap device, which should beremoved for potential shock reasons prior to applying powerto the unit under test.

2.After removing an electrical assembly equipped with ESdevices, place the assembly on a conductive surface suchas aluminum foil, to prevent electrostatic charge buildup orexposure of the assembly.

3.Use only a grounded-tip soldering iron to solder or unsolderES devices.

4.Use only an anti-static solder removal device. Some solderremoval devices not classified as anti-static can generateelectrical charges sufficient to damage ES devices.

5.Do not use freon-propelled chemicals. These can generatean electrical charge sufficient to damage ES devices.

6.Do not remove a replacement ES device from its protectivepackage until immediately before you are ready to install it.(Most replacement ES devices are packaged with leadselectrically shorted together by conductive foam, aluminumfoil,or comparable conductive material).

7. Immediately before removing the protective material fromthe leads of a replacement ES device, touch the protectivematerial to the chassis or circuit assembly into which thedevice will be installed.

Caution: Be sure no power is applied to the chassis or cir-cuit, and observe all other safety precautions.

8.Minimize bodily motions when handling unpackagedreplacement ES devices. (Normally harmless motion suchas the brushing together of your clothes fabric or the liftingof your foot from a carpeted floor can generate static elec-tricity sufficient to damage an ES device.)



THE STEPS FOR CHANGE THE OPTION CODE

Push Switch POWER ON/OFFat remocon or timer keyborad

Use remocon and push ENTER

After finish edit code of optionpush ENTER at remocon

For finishing and intializedthe option code push

REC + EJECT at remocon

Use Direction Key atremocon (LEFT/RIGHT)

for select the position of option

Use Direction Keyat remocon (UP/DOWN)

for change the option

Select DVD MODE at the setuse remocon or timer keyborad

Push REC+ PLAY at timer keyboard

NAME HEXMODELS : RC3'SOPT 1 00OPT 2 00OPT 3 00OPT 4 00OPT 5 00OPT 6 00OPT 7 00OPT 8 00

Press Enter keyto Save and Exit

DETECT NEW EEPROM (OPTION EDIT SCREEN)

* Note : This procedure must be done when IC503(On VCR Board).



UP-DATING PROGRAM

BURNING DISC

For up-dating the DVD program using the disc, it must burning the disc which include the DVD software.

For recorder combi set which using the disc downloader program are DVD Program and Loader Program.

In 2nd generation for recorder combi can download the DVD program and Loader program one by one, or alltogether.

If you format like number 1 youll see capture like (figure 1)

And you have three choice:1. Main. Its mean if you chose this itll up-dating only DVD prgram.2. Loader.Its mean if you chose this itll up-dating only Loader program.3. ALL. Its mean if you chose this itll up-dating DVD and Loader program.

If you format like number 2 youll not see capture like figure 1 that give you choices, you have no choice onlyupdate DVD program

Number 1

Number 2

* There is two way to format disc DVD Program1.DVD and LOADER program format in one disc2.Only DVD program format in one disc

[FIGURE 1]



DVD UPGRADE INSTRUCTION

FORMAT NO 1

1. Press POWER KEY to turn on.2. After booting, insert the upgrade disc, and you will see massage like [FIGURE 1]3. Press PLAY key (front or remote) 3 times and you will see as [FIGURE 2] with remote Chose one of them

then Press enter4. For update both of them [MAIN & LOADER] we chose ALL and first you will see [FIGURE 3] DVD update

Check the Current Version and New CD Write Version and press PLAY key.5. The DVD update will be on progress.And when finish update MAIN Version its automatically continue to

Update Loader Version and You will see [FIGURE 4]Check the Current Version and New CD Write Version and Press PLAY key once more

6. The LOADER update will be on progress. And tray will open.7. Remove the disc and wait until finish8. The tray will be close and open automatically after completing UNDER UPDATE 100%9. Turn off the unit10.Turn on again the unit is operation with new software

FORMAT NO 2

1. Press POWER KEY to turn on.2. After booting, insert the upgrade disc, and you will see massage like [FIGURE 1]3. Press PLAY key (front or remote) 3 times4. The DVD update will be on progress.

Check the Current Version and New CD Write Version and Press PALY key once more5. The tray will be open automatically after completing UNDER UPDATE 100%6. Remove the disc and Turn off the unit7. Turn on again the unit is operation with new software

[FIGURE 1] [FIGURE 2]





SPECIFICATIONS

GENERALPower requirements AC 200 ~ 240V, 50/60HzPower consumption 23WDimensions (approx.) 430 X 78.5 X 260mm (w x h x d) without footNet weight (approx.) 4.2kgOperating temperature 5C to 35COperating humidity 5% to 90 %Television system PAL B/G, PAL I/I, SECAM D/K, color systemRecording format PAL

RECORDINGRecording format DVD Video Recording, DVD-VIDEORecordable media DVD-RW, DVD-R, DVD+RW, DVD+R,Recordable time DVD (4.7GB): Approx. 1 hour (XP mode), 2 hours (SP mode),

4 hours (LP mode), 6 hours (EP mode), 14 hours (MLP mode)Video recording formatSampling frequency 27MHzCompression format MPEG2 (VBR supported)Audio recording formatSampling frequency 48kHzCompression format Dolby Digital

PLAYBACKFrequency response DVD (PCM 48kHz): 8Hz to 22kHz,

CD: 8Hz to 20kHzDVD (PCM 96kHz): 8Hz to 44kHz

Signal-to-noise ratio More than 100dB (AUDIO OUT connector)Harmonic distortion Less than 0.008% (AUDIO OUT connector)

INPUTSDynamic range More than 95dB (AUDIO OUT connector)ANTENNA IN Antenna input, 75 ohmsVIDEO IN 1.0Vp-p 75 ohms, sync negative, RCA jack x 2AUDIO IN 2.0Vrms more than 47 kohms, RCA jack (L, R) x 2DV IN 4 pin (IEEE 1394 standard)

OUTPUTSVIDEO OUT 1Vp-p 75, sync negative, SCART x 2S-VIDEO OUT (Y) 1.0V(p-p), 75, sync negative,

Mini DIN 4-pin x 1(C) 0.3V(p-p) 75COMPONENT VIDEO OUT (Y) 1.0V(p-p), 75, sync negative, RCA jack x 1,

(PB)/(PR) 0.7V(p-p), 75, RCA jack x 2Audio output (digital audio) 0.5V(p-p), 75, RCA jack x 1Audio output (optical audio) 3V(p-p), 75, Optical connector x 1Audio output (analog audio) 2.0Vrms (1kHz, 0dB), 600,

RCA jack (L, R) x 1 / SCART x 2



SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS .....................................................................................................................................2-21. CABINET AND MAIN FRAME SECTION ..................................................................................................2-22. DECK MECHANISM SECTION [RV9(DR-11A)] ........................................................................................2-33. DECK MECHANISM SECTION (D37(N))..................................................................................................2-44. PACKING ACCESSORY SECTION...........................................................................................................2-7



OPTIONAL PART

46

9

27

2

SM

PS

BO

AR

D

A4

7

46

9

A0

0

47

0

45

74

57

30

0

25

0

46

2

46

2

46

5

33

0

32

0

26

0

26

1

26

1

26

1

46

5

A4

4

28

4

28

6

28

5

28

3

28

1

27

5

46

9

47

2

27

4

VC

R B

OA

RD

46

9

46

9

32

3

A4

6

A

CA

BL

E8

BC

D

A5

0A

50

A

KE

Y/T

IME

RB

OA

RD

KA

RA

OK

EO

PT

ION

AL

PA

RT

47

3

A4

1

KA

RA

OK

EB

OA

RD

28

0

46

3

C

D

BF

DV

D &

LO

AD

ER

BO

AR

DC

AB

LE

6

CA

BL

E5

CA

BL

E4

HD

MI

BO

AR

DE

46

9

46

9

HD

MI

OP

TIO

NA

LP

AR

TE

F

CA

BL

E7

A5

4

A5

4A

25

3

A4

3

27

9

45

2

27

8

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION



2. DECK MECHANISM SECTION [RV9(DR-11A)]

Main C.B.A

OPTIONAL PART

1018

1019

DR-11A : IN, SH ONLY

1045

A005

DR-11A : PT ONLY

1045

1044

1042

A005

1018

1019

1431

1437

1025

1432

1432

1041

1002

A001

A52

1020

1439

10461047

10111013

1017

1433

1026

1016

1015

1012

1030

1038

1432

1036

A002

1001

1003

DVD & LOADERBOARD

CABLE6

CABLE4

CABLE5

1043

1043



3. DECK MECHANISM SECTION (D37(N))3-1. Front loading mechanism section

100

A21

A23

A24

032

109

A22

054A

054

115

116

110

112

113

114

103

105

102

106

107



3-2. Moving mechanism section (1) 00

8

011

031

079

017

032

024

406

031

021

028

029

026

A03

027

022

003

004

006

007

014

015

009

409

013

016

012

OPTIONAL PART

A01

405



3-3. Moving mechanism section (2) 05

2 517

061

056

518

052A

055

410

032

077

076

078

060

051

064

A11

A12

067

066

065

068

069

070

023

080

058



4. PACKING ACCESSORY SECTION

BATTERY808

INSTRUCTION ASSEMBLY801

BAG804

PACKING803

806 CABLE(COAXIAL)810 CABLE ASS'Y RF

BOX CARTON802

PACKING803

811

812

PLUG ASS'Y 1WAY

PLUG ASS'Y 2WAY

OPTIONAL PARTS

832 DISC

821 SCART CABLEREMOCON900



MEMO



SECTION 3

ELECTRICAL

CONTENTS

OVERALL WIRING DIAGRAM ...................3-2

VCR PART

ELECTRICALADJUSTMENT PROCEDURES..................3-3

1. SERVO ADJUSTMENT ................................3-3

VCR ELECTRICALTROUBLESHOOTING GUIDE ....................3-4

1. POWER (SMPS) CIRCUIT...........................3-42. SYSTEM/KEY CIRCUIT ...............................3-83. SERVO CIRCUIT .........................................3-94. Y/C CIRCUIT ..............................................3-115. HI-FI CIRCUIT............................................3-156. TUNER/IF CIRCUIT ...................................3-18

WAVEFORMS .................................................3-201. AUDIO BLOCK

(WHEN 1kHz SIGNWAVE IS OUTPUT) .....3-20

BLOCK DIAGRAMS.....................................3-231. POWER (SMPS) BLOCK DIAGRAM .........3-232. TUNER BLOCK DIAGRAM ........................3-253. Y/C BLOCK DIAGRAM ..............................3-274. HI-FI BLOCK DIAGRAM ............................3-295. SYSTEM BLOCK DIAGRAM......................3-316. SCART & SWITCH BLOCK DIAGRAM......3-33

CIRCUIT DIAGRAMS ..................................3-351. POWER (SMPS) CIRCUIT DIAGRAM.......3-352. TUNER CIRCUIT DIAGRAM......................3-373. A/V CIRCUIT DIAGRAM.............................3-394. HI-FI CIRCUIT DIAGRAM ..........................3-415. SYSTEM CIRCUIT DIAGRAM ...................3-436. I/O JACK CIRCUIT DIAGRAM ...................3-457. HDMI CIRCUIT DIAGRAM

(HDMI MODEL ONLY) ................................3-478. KARAOKE CIRCUIT DIAGRAM

(KARAOKE MODEL ONLY) ........................3-499. VIDEO/AUDIO CODEC, MSP

CIRCUIT DIAGRAM...................................3-5110. KEY CIRCUIT DIAGRAM ...........................3-53 CIRCUIT VOLTAGE CHART ....................3-57

PRINTED CIRCUIT BOARDDIAGRAMS .....................................................3-62

1. VCR P.C.BOARD........................................3-612. SMPS P.C.BOARD.....................................3-65

3. KARAOKE P.C.BOARD(KARAOKE MODEL ONLY) ........................3-65

4. KEY P.C.BOARD .......................................3-67

VDR PART

VDR ELECTRICALTROUBLESHOOTING GUIDE ..................3-71

1. NO COMPONENT VIDEO SIGNALWHEN PLAYING DISC ..............................3-71

2. NO COMPOSITE/S-VIDEO SIGNALWHEN PLAYING DISC ..............................3-72

3. NO TV, EXTERNAL INPUTVIDEO SIGNAL..........................................3-73

4. WHEN PLAYING DISC, NO AUDIO OUTPUT (IN VCR BOARD) ....3-74

5. NO OPTICAL/DIGITAL OUTPUT ...............3-756. SYSTEM CIRCUIT PART (DISPLAY

HELLOW ON THE WINDOW).................3-76

WAVEFORMS .................................................3-771. SYSTEM BLOCK........................................3-772. DV BLOCK (TPA, TPB) ..........................3-793. USB BLOCK (D).......................................3-80

BLOCK DIAGRAMS.....................................3-811. VDR SET TOTAL BLOCK DIAGRAM.........3-812. VDR MAIN H/W BLOCK DIAGRAM...........3-833. DVD POWER BLOCK DIAGRAM ..............3-854. AUDIO IN/OUT BLOCK DIAGRAM ............3-875. VIDEO IN/OUT BLOCK DIAGRAM ............3-896. DV1394, USB BLOCK DIAGRAM..............3-91

CIRCUIT DIAGRAMS ..................................3-921. MPEG CIRCUIT DIAGRAM........................3-932. DDR, LATCH, FLASH, RESET

CIRCUIT DIAGRAM...................................3-953. DV1394, INTERFACE CON

CIRCUIT DIAGRAM...................................3-974. RF IC, MOTOR DRIVE IC

CIRCUIT DIAGRAM...................................3-995. DSP CIRCUIT DIAGRAM.........................3-101 CIRCUIT VOLTAGE CHART ................3-103

PRINTED CIRCUIT BOARDDIAGRAMS ...................................................3-105

1. VDR & LOADER P.C.BOARD ..................3-105



OVERALL WIRING DIAGRAM

FA

N(O

pti

on

)

DV

D+L

OA

DE

R

KARA

OKE

BOAR

D

DE

CK

SM

PS

VC

R B

OA

RD

PSV

01

PVS0

1P3

D01

PD30

1

P3D

03

PD30

3

P3D

02

PD30

2

PMC

01

PMC

01

PSF0

1

P101

PMH01

HD

MI

BO

AR

DPHM01 PV601

KEY

BOAR

D

P6V01

PVK

01

PKV

01

1211

109

87

65

43

21

DRUM CTLDPG/DFGL/M CTLCAP. CTL

DRUM VCC(13.5VA) S. GND

MOTOR GNDI-LIMIT

CAP_REV 'H'SERVO. VCC

CAP.VCCCFG

12

6A. PB6

5A. REC5

4A/E (-)4

3A/E (+)3

2CTL (-)2

1CTL (+)111

109

87

65

43

21

21

FULLERASE2

1412V14

135V13

122.5V12

11GND11

103.3V10

9DVD_PWR_CTL9

8GND8

734VA7

614VA6

5GND5

413.5V4

3CAP_Vcc3

2GND2

15.3VA1

F. GND1

9HF PB B9

8HF REC8

7HF PB A7

6EP PB A6

5EP REC5

4EP PB B4

3SP PB B3

2SP REC2

1SP PB A1PM

I02

CN

652

14TS_CLK14

15GND15

13GND13

12TS_SYNC12

11TS_DATA11

10TS_VALID10

9GND9

8/DEMOD_RST8

7TU_PWR_CTL7

6ERROR6

5USB_PO5

4USB_OC4

3GND3

2USB_BDMO2

1USB_BDPO1

21

FAN_Vcc2

GND1

6MIC_DET_L6

5REG12V5

4MIC_IN_R4

3GND3

2MIC_IN_L2

15.0V1

6G

ND

55.

0V (

G)

4D

UB

_LE

D 'H

' (V

=>

D)

3D

UB

_LE

D 'H

' (D

=>

V)

2K

_RT

N2

1

654321K

_RT

N1

PVM01

PMS01

1G

ND

2D

1.25

V3

D1.

25V

4D

2.5V

5D

3.3V

6D

3.3V

7G

ND

8D

1.8V

9D

5.0V

10D

12V

11

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

GN

D

1D

1.8V

2D

1.8V

3/H

DM

I_R

ST

4D

3.3V

5D

3.3V

6G

ND

7D

5V8

D5V

9G

ND

10S

PD

IF11

GN

D12

AO

_MC

LK

13G

ND

14C

EC

15G

ND

16N

C (

/HD

MI_

IRQ

)17

GN

D18

VO

_CL

K19

GN

D20

VO

_DO

21V

O_D

122

VO

_D2

23V

O_D

324

VO

_D4

25V

O_D

526

VO

_D6

27V

O_D

728

GN

D29

VO

_D8

30V

O_D

931

VO

_D10

32V

O_D

1133

VO

_D12

34V

O_D

1335

VO

_D14

36V

O_D

1537

GN

D38

SD

A39

SC

L40

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 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40G

ND

PVM

02

PMI0

1

TPB-50

TPB+49

TPA-48

TPA+47

GND46

/DVD_RST45

SYNC_DET_H44

/VDEC_RST43

/SPI_CS142

GND41

VI-DO40

VI_D139

VI_D238

VI_D337

VI_D436

VI_D535

VI_D634

VI_D733

VI_CLK32

GND31

AI_MCLK30

AI_SCLK29

AI_FSYNC28

AI_DO27

AO_MCLK26

SPDIF25

AO_FSYNC24

AO_SCLK23

AO_DO22

GND21

SDA20

SCL_19

SPI_MOSI18

SPI_MISO17

SPI_CLK16

DVD_IR15

STANDBY_H14

CEC13

GND12

E5_R/Pr_OUT11

GND10

E5_B/Pb_OUT9

GND8E5_G/Y_OUT7

GND6E5_C_OUT5

GND4

E5_Y_OUT3

GND2

E5_CVBS_OUT1

5049

4847

4645

4443

4241

4039

3837

3635

3433

3231

3029

2827

2625

2423

2221

2019

1817

1615

1413

1211

109

87

65

43

21



VCR PARTELECTRICAL ADJUSTMENT PROCEDURES

1. SERVO ADJUSTMENT1) PG Adjustment

Test Equipmenta) OSCILLOSCOPE b) PAL MODEL : PAL SP TEST TAPE

MODE MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION

PLAYV.Out

R/C TRK JIG KEY 6.5 0.5HH/SW(TP)

Adjustment And Specification

Adjustment Procedurea) Insert the SP Test Tape and play.b) Connect the CH1 of the oscilloscope to the H/SW and CH2 to the VCR VIDEO TP for the VCR.c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW, and then check the distance (time dif-

ference), which is from the selected A(B) Head point of the H/SW signal to the starting point of the ver-tical synchronized signal, to 6.5H 0.5H (416s, 1H=64s).

PG Adjustment Methoda-1) Playback the SP standard tapeb-2) Wait for 3seconds with F/P REC key and PLAY key presseed at the same time. < Digitron[ - - ] >c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically. < Digitron[ PG ] >d-4) Stop the playback, then it goes out of PG adjusting mode after mony the PG data.

CONNECTION

WAVEFORM



VCR ELECTRICAL TROUBLESHOOTING GUIDE

Is the D128 normal?

1. POWER (SMPS) CIRCUIT

No .5.3VA

YES

Is the F101 normal? Replace the F101 (Use the same Fuse)

YES

NO

Is the BD101 normal? Replace the BD101

YES

NO

Is the R101 normal? Replace the R101

YES

NO

Is Vcc (13V - 27V)supplied to IC101 Pin2? Is the D102 normal?

YES

NO

NO

Check or Replace the D102

IS the D123 normal? Replace the D123

YES

NO

Is there about 2.5V atthe IC103 Pin1?

Replace the IC103

YES

NO

Is the IC102 normal? Replace the IC102

YES

NO

Is the D122 normal? Replace the D122

YES

NO


YES

NO


YES

NO

Replace the D128

YES

NO


YES

NO

Power Line of Main PCB is short




No 5.0V

Is theVcc(5.3V) supplied to Q801

collector?Check or Replace the D123

YES

NO

NOIs the Q801 Base H? Check the 33V Line or ZD815

YES

Check or Replace the Q801

No REG 12V

Is theVcc(13V) supplied to Q802

collector?Check or Replace the D122

YES

NO

NOIs the Q802 Base H? Check the 33V Line or ZD816

YES


No 33V

Is theVcc(34V) supplied to Q803

Emitter?Check or Replace the D126

YES

NO

NOIs the Q804 Base L?

Check the PWR CTLH signal from -com

YES


VCR MAIN



No Cap Vcc or 13.5VA

YES


YES

NO

Power Line of Main PCB is short

No 3.3V

YES

Is the Vcc(3.8V) supplied toIC153 pin1?

Check or Replace the D127

YES

NO

Is the IC153 pin4 H?Check the DVD CTL

H signal from -com

YES

NO

Check or Replace the IC153

No 12VL

YES

Is theVcc(13.5V) supplied to

IC155 pin 1?Check or Replace the D124

YES

NO

Is the IC155 pin4 H? Check the DVD CTLH signal from -com

YES

NO





No 5VL

YES

Is theVcc(5.5V) supplied to IC156

pin1?Check or Replace the D128

YES

NO


H signal from -com

YES

NO


No 2.5V

YES

Is theVcc(13.5V) supplied to D156

anode?Check or Replace the D156

YES

NO


H signal from -com

YES

NO





2. SYSTEM/KEY CIRCUIT2-1. AUTO STOP

NO

YES

Doesthe H/SW waveform

appear at IC501Pin23?

Check the DrumMotor signal.

Auto Stop

Replace IC501.

YES

NO NODo the

T-UP Reel Pulsesappear at IC501

Pin3?

Does 5.0Vappear at the RS501?

Do T/UP Reel Pulses

appear at the Q501 Baseterminal?

YES

Replace the T/UP ReelSensor (RS501).

YES

Check the Power Circuit.

YES

NO

2-2. The unstable loading of a Cassette tape

Note : Auto stop can occur because Grease or Oil has dried up

NO

YES

Is 12Vapplied to PMC01

Pin8?Check the power.

The unstable loading of aCassette tape

Check the DeckMechanism.

Check IC501Pins86, 87, 88, 89.

YES

YES

YES

NO NODoes the

H signal appear atIC501 Pin32 during

inserting of theCST?

Does theL signal appear atIC501 Pin19 during

inserting theCST?

Is 5.0Vapplied to the R535 ?

Check the CST SW andthe peripheral circuitry.

Refer to SMPS 5.3VAtroubleshooting.

YES

NO




3. SERVO CIRCUIT3-1. Unstable Video in PB MODE

3-2. When the Drum Motordoesnt run.

NO

YES

YES

Do theCTL pulses appear at

IC501 Pin76?

YES

Does 12Vappear at PMC01

Pin8?

YES

Does 2.8Vappear at PMC01

Pin12?

Do theDrum PWM Pulsesappear at the IC501

Pin34?

Do theDFG Pulses appear at

IC501 Pin65?

Is adjusting the height ofthe CTL Head accurate?

NO Readjust the height of theCTL Head.

YES

YES

YES

When the Drum Motordoesnt run,

Does the Noise level of thescreen change periodically?

NO

YES

YES

On trackingdo the CTL pulses

move?Replace IC501.

NO

Do theDFG Pulses appear at

PMC01 Pin11?

NO

Refer to (2) No 12VA ofPower section

Arent the foil patterns andthe Components betweenIC501 Pin34 and PMC01

Pin12 shorted?

Are the connecting patterns and the Componentsbetween IC501 Pin34 and PMC01 Pin12 shorted?

NO

Replace the Cap M.

Arent the foil patterns andthe Components betweenIC501 Pin65 and PMC01

Pin11 shorted?

NO

NO

NO

Do theDrum PWM Pulses


YES

Replace IC501.NO

YES

YES

Does theVideo Envelope waveform


Refer to When the Y signaldoesnt appear on thescreen in PB Mode.

Does the CFG waveformappear at IC501 Pin67?

Replace IC501.

Check the connector(PMC01) and theDrum Motor Assy.




3-4. Keys do not working

Keys do not working

YES

Is 5Vapplied to IC501 Pin36? Refer to SMPS 5.3VA Trouble Shooting.

YES

NO

Replace the defective switches.NODoes CLOCK LED change

when a function button is pressed?

When the Capstan Motor doesnt run,

Does theCFG signal come into IC501

Pin67?

YES

NODoes 12.5VA appear at PMC01?

Refer to SMPS(CAPSTAN/13.5VA)Trouble Shooting.

YES

NO

NO

YES

Does 2.8Vappear at PMC01?

YES

Does thePWM signal appear at

IC501 Pin108?

YES

Arent the foil patterns and Componentsbetween IC501 Pin33 and PMC01

Pin9 shorted?

Check the PMC01 and theCapstan Motor Assy.

Arent the foil patterns and Componentsbetween IC501 Pin33 and PMC01 Pin9

short?

NO

NO

NO

Does theCFG signal appear at

PMC01 Pin1?

Check the Capstan Motor Assy.

Does theCapstan PWM signal appear at

IC501 Pin33?

YES

Arent the foil patterns and componentbetween IC501 Pin67 and PMC01 Pin1

shorted?

Replace IC501.

3-3. When the Capstan Motor doesnt run,




4. Y/C CIRCUIT4-1. No Video in EE Mode,

NO

YES

Does theVideo signal appear at

IC301 Pin15?Check the IC901 Pin42.

YES

NO

YES

Is REG5.0V applied to IC301Pins4, 22, 47, 50, 52,

60, 84, 92?

Check the 5.0V, 5.3VALine. (Power Circuit)

Check the Video BufferQ310.

No Video in EE Mode

NOCheck C327. (AGC)

YES

NO NODoes theVideo signal appear at

IC301 Pin29?

YES


IC401 Pin29?

Check the DVD BoardVideo path. Replace IC301.

NO

YES YES

Does theVideo signal appear at the

PVM02 Pin50?

IC901 Pins30(5V), 14(REG12V) Pins31,

32 (I2C BUS)

NO

YES

YES

Does theVideo signal appear at the

IC901 Pin39?

Is I2C BUSsignal applied to IC301

Pins73, 74?

Check the System Circuit.(Refer to SYSTEM I2C BUSCHECK Trouble Shooting)

Check the Cable or SCART JACK




4-2. When the Y(Luminance) signal doesnt appear on the screen in PB Mode,

NO

YES

Is 5.0V5.3VA applied to

IC301 Pins22, 47, 50,52, 60, 84?

Check the line of the 5.0V5.3V Line. (Power Circuit)

NO

YES

Does the normal RF signalappear at IC301 Pin76?

YES

Does the Y(Luminance) RFsignal appear at IC301 pin79?

YES

Is theV.H.S/W signal

applied to IC301Pin80?

Clean the Drum.

NO Check the System Circuit.(IC501 Pin23)

YES

Is theV.H.S/W H about

3.4V at theIC301 Pin80?

NO Check the V.H.S/W level.(Check R342)

NOCheck the IC301.

NO

YES

Is I2CBUS signal applied to

the IC301 Pins73,74?

Refer to SYSTEM I2CBUS CHECK Trouble

Shooting.

When the Y(Luminance)signal doesnt appear on the

screen in PB Mode,




4-3. When the C(Color) signal doesnt appear on the screen in PB Mode,

NO

YES

Is 5.0V5.3VA applied to the

IC301 Pins24, 42, 55,72, 81.

Check the line of the 5.0V5.3VA Line. (Power Circuit)

NO

YES

Does theColor signal appear at

IC301 Pin25?

YES

Does theX301 (4.43MHz)

osxillate?

Replace the IC301.

NOReplace the X301.

YES

Does theColor signal appear at

IC301 Pin48?

NOCheck the Color Pass.

YES

NODoes the

waveform RF signalappear at IC301

pin76?

Replace the IC301.

YES

When the C(Color) signaldoesnt appear on the screen

in PB Mode,

Replace the IC301.




4-4. When the Video signal doesnt appear on the screen in REC Mode,

NO

YES

Is theEE signal normal? Check EE Mode.

NO

NO

Does theRF signal appear at the

IC301 Pin76?

YES

Is the REC Hsignal (about 4V) applied

to the Q307?

Check REC Luminacepass & Color pass.

NO Check the System of RECH.(the IC501 Pin27)

NOReplace the IC301.

YES

NO

NO

Is 5.0V5.3VA applied to the

IC301 Pins22, 41, 47,50, 52, 60, 84?

Check the line of the 5.0V5.3VA line. (Power Circuit)

YES

Does PBMode operate

nomally?Check PB Mode.

YES

YES

YESDoes the

REC RF signal appearat the IC301 Pins88,

89, 94, 95?

Check the circuit of theIC301 Pin85, 86.

YES

When the Video signaldoesnt appear on thescreen in REC Mode,

Check the Drum &Drum Connector




5. Hi-Fi CIRCUIT5-1. No Sound(EE Mode)

No Sound.

Check the Digital Audio path betweenIC401 and DVD Board.

NOCheck the TUAudio of IC801 Pins2, 3. Check the IC401 Pins106, 107.

NOCheck the DVDAudio of IC801 Pins4, 5. Check the IC402 Pins14, 15.

NOCheck the AV1Audio of IC801 Pins6, 7.

Check the Scart1 Jack.(JK905 Scart1 Audio in Pin2, 6).

NOCheck the AV2Audio of IC801 Pins8, 9.

Check the Scart2 Jack.(JK905 Scart2 Audio in Pin2, 6).

YES

YES

NOCheck the AV3Audio of IC801 Pins10, 11. Check the front Jack.

NO

Check the Vccof IC801 Pins34, 40, IC901

Pins14, 30.

Check the IICClock and DATA at IC801

Pins42, 43.

Check the Power 5.0V, 12V.

YES

NOCheck the IC501 Pins17, 18.

YES

NOCheck the Audioof IC801 Pins16, 17.

Replace IC801.

YES

NOCheck theIC401 Pins120, 121.

Check the Pcb Pattern between IC801Pin16, 17 and IC401 Pins120, 121.

YES




5-2. Hi-Fi Playback

NO

YES

YES

Check the Vcc ofIC801 (Pins34, 40)

Check Power 5.0V, 12V.

NO

YES

Is the RFEnvelope at IC801 Pin44

over 2Vp-p?

NO

YES

Check IC801Pin42(Data), Pin43

(Clock)

Check the parts of -COM(IC501 Pins17, 18)

NO NODo AudioSignals appear at IC901

Pins37, 38.

Check the 2C402 Pins14, 15.

NO

YES

YES

YES

Check the IC901 Pins11, 12.

Check the Jack(JK901,JK905)

Do Audio Signals appearat JK901, JK905?

Check the DVD BoardAudio path

NO

YES

Check theHi-Fi Selection switch.(IC801 Pin41) and the

Tape quality.

Check IC501 Pin26(A.H/SW)

NO

YES

Do AudioSignals appear at

IC801 Pin16(L-CH), 17(R-CH)?

Check the Connection atP3D01 Pins7, 9.

PB mode

No Sound.




Hi-Fi REC.

It cant be recorded Hi-Fi Audio signal.

NOCheck Vcc of IC801.(Pins34. 40)

Check Power 5V, 12V.

YES

NOCheck IC801Pin42(Data), Pin43(CLOCK).

Check ports of -COM.(IC501 pins 17, 18)

YES

NODo Audiosignals appear at IC801

Pins16, 17?

Check Audio input signal of IC801Pins2, 3(TU.A.), 4, 5(DVD.A.), 6,

7(AV1.A), 10, 11(AV3.A).

YES

NODo FM Audiosignals appear at IC801

Pin36?Replace IC801.

YES

Check the Contact Point of DrumConnector if good then Replace the Drum.

YES

YES

5-3. Hi-Fi REC.




6. TUNER/IF CIRCUIT6-1. No Picture on the TV screen

NO NO

YES

YES


TU701 Pin18.

NO

YES

Does thevideo signal appear at

IC901 Pin7.

Is 33V applied toTU701 Pin16?

YES

Check 33V line.

NO

YES

Check 5V line.

NODoes theClock signal appear at

TU701 Pin11?

Is +5V applied toTU701 Pin4?

YES

Check the llC Clock Signalof -COM Pin18.

YES

Check the llC Data Signalof -COM Pin17.

Does the data signalappear at TU701 Pin12?

Check the Connection atP3D01 Pins7, 9.

Check the Pattern betweenTU701 Pin18 and IC901 Pin7.

NO

YES

Does theVideo signal at the IC901

Pin42.Replace the IC901.

NO

YES


Pin15.

Check the Pattern betweenIC901 Pin42 and IC301 Pin15.

NO

YES


Pin 29.Replace the IC301.

NO

YES

Does thevideo signal at the IC401

Pin29.

Check the DVD Board VideoPath.(Check the PMI01, PMI02)

NO

YES



NO

YES



No Pictureon the TV screen

Check the Pattern betweenIC901 Pin39 with JK905 Pin19




No Sound

NOCheck theVcc(D1.8V) of IC401 Pins3,

18, 48, 69...Check D1.8V Line.

Check the No Sound(EE_mode)

YES

NOCheck theVcc(D3.3V) of 2C401 Pins5,

59, 67...Check D3.3V Line.

YES

NOCheck theTuner SiF signal at IC404

Pin33.Check the Tuner SIF of TU701 Pin15.

YES

NOCheck the oscillator ofIC404 Pins53, 54.

Replace X401

YES

NOCheck the I2C at IC401Pins 44, 45

I2C(SCL, SDA) at PVM02 Pins31, 32.

YES

NOCheck the Audio ofIC401 Pins106, 107.

Replace IC401

YES

NOCheck the Audioof IC801 Pins16, 17.

Check the IIC Clock and Data at IC801 Pins42, 43.

YES

NOCheck the Audio ofIC401 Pins120, 121.

Check the DVD Board Audio Path.

YES

YES

6-2. No Sound




WAVEFORMS

1. AUDIO BLOCK (WHEN 1kHz SIGNWAVE IS OUTPUT)

12

34

3

AOUT_D0

4

AOUT_MCLK

1

AOUT_FSYNC

2

AOUT_SCLK



5

SPDIF_OUT

IC1101

6

7

7 6

A-OUT_R & A-OUT_L

5



MEMO

3-23 3-24

BLOCK DIAGRAMS1. POWER (SMPS) BLOCK DIAGRAM

BD101

T101TRANS

+

BR BL(BK)(WH)

C103

!

!

!

!!

FUSE(F101)

NOISE FILTERBLOCK

(C101,L102,C102)

PHOTO COUPLER(IC102)

ERRORAMP

(IC103)

SNUBBERBLOCK

(D101,C105C106,R104)

DRIVE & S/W BLOCK(IC101, D102, R105, C104, C108 , C109,

C107,ZD102)

Y-CAPC111

Y-CAPC110

FEED-BACKBLOCK

(R141,R142,C143,R143.R144.R145

R146)

RECTIFIER &SMOOTING BLOCK(D123,C123,C133,

L123)

RECTIFIER &SMOOTING BLOCK(D127,C127,C137,

L127)

RECTIFIER &SMOOTING BLOCK(D126,BC102,R126,

C126)

RECTIFIER &SMOOTING BLOCK

(D128,C128)

5.3VA

3.3V

5.0V

12VL

34VA

2.5V REG BLOCK(D156,IC154,R154,

C154)

12V REG BLOCK(IC155,R155,C155)

3.3V REG BLOCK(IC153,C152,R153)

5V REG BLOCK(IC156,C156,R156) 5.0VL

Cap VccRECTIFIER &SMOOTING BLOCK(D122,C122,C132,

L122)

13.5VA

REG12V

2.5V

DVD CTLH

RECTIFIER &SMOOTING BLOCK

(D124,C124,L124,C134)

R160 FAN Vcc

Fan option

Copyright 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes


3-25 3-26

2. TUNER BLOCK DIAGRAM



3-27 3-28

3. Y/C BLOCK DIAGRAM

IC301AVCP

DEC/ENCVIDEO

SYSTEM(DMN8603 +

SAA7138)

S/WVIDEO

AV3VIDEO

DVDCVBS

15PIN

17PIN

19PIN

BUFFERAVCPVIDEO

MICOMVIDEO

IC501MICOM

IC201LA70100SECAM

IC901MM1763XJ6dB AMP

CANAL JK901SCARTJACK

IIC C

LK

IIC D

AT

A

2V 1V

2V

SEC.REC.COLOR

V.OUT

DVD CVBSAV2

AV1TU

FRONTI/O

JACK

DVD CVBS

77PIN

82PIN

29PIN

SEC/MES DET H

IIC C

LK

IIC D

AT

A

19PIN



3-29 3-30

4. HI-FI BLOCK DIAGRAM

DVD AUDIO VCRHi-Fi

AMP

SCART1AV1

SCART2AV2

FRONTJACKAV3

TUNER

KARAOKE BOARD

SIF

TUNER AUDIO

OUT

ININ

VCR AUDIO

WITHRCA

OU

T

OUT

WITH RCA

TUNER /

Hi-Fi

CANAL IC

TUNER

Hi-Fi



3-31 3-32

5. SYSTEM BLOCK DIAGRAM

GNDMODE S1MODE S2MODE S3MODE S4

MODE S/W

TO/FROM AVCP

T-UP REEL

T-UP END

SUP REEL

CST.SW/REC TAP

5V

CS5015.3VA

5.3VA

ES501

LD501DECK IR LED

RS501

RS502

C500 C501

MS501

To/FROM DVD

X50114MHz

32.768KHz

OSC

OSCX502

1

2RESET

GNDVcc 3

5.3VA

5V

+ +

+

L501

SUP END

ES502

C535R564

R/CIN

RM501

+

TO/FROM DECK

Q503

Q504

89

88

87

86

6

2

32

3

36

25

IC501MN101D10X

MODE S1I_LIMIT

MODE S2

MODE S3

MODE S4

10 DVD ENA

12 DATA(DVD->VCR)

13 DATA(DVD->VCR)

11 DVD CLK

TOP_SENSOR

T/UP_REEL

SUP_REEL

CST_SW VC

C (M

AIN

)

CA

P_P

WM

CT

L (+

)

CT

L (-

)

CF

G

CA

P_R

EV

' H

'

L/M

_CT

L

V. E

NV

V.H

. SW

DP

G/F

G

DV

.SY

NC

38

37 OSCO

XI

XO

OSCI

40

41

74 75 67 21 19 82 2334 65 24

C.K

ILLE

R

963320

DR

UM

_PW

M

51

VC

C (O

SD

)

85 END_SENSOR

5 73

A. V

CC

(ser

vo, A

/D)

TO/FROM AUDIO(Hi-Fi)

TO/ FROM TU/IF17

81

IIC_DATA IIC_CLK

AFT

18

64TU_SECAM' H' TU_SECAM_VL' H' 63

P/FAIL 4

A_MUTE' H'

A_ENVA_H/SW

58

18

17 IIC_CLK

IIC_DATA

27

50

REC' H'

84SEC_DET' H'

98MIC_DET' H'

XLINK_DATA_OUTLED_ENA

XLINK_CLK

7

TO/FTO/FROM SCART/SWITCH59RGB_OUT' H'

A_MUTE' H'

SUPER_DET' H' 61

62V_MUTE' L'AV1' H' 60

58

57C+_DET' H'D.CON2 93

8VCR' H'RGB_SW' H' 97

83

26

16

28

14

2GND

Vcc 3

IC505

IC504

1

IC506

DISPLAYDIS501

VCR+DVD REC SCART+RCA

MODULATOR_4' L'

T O / F R O M I / OI / OD.CON3 94

FROM KARAOKE BOARD

49C.V INC.V IN2



3-33 3-34

6. SCART & SWITCH BLOCK DIAGRAM

Tuner

AV1

AV2

AV3

DVD_CVBS

S/W video

RECREC / P/ P BBLOCK BLOCK

DVD_CVBS

AV2

6dB6dBAmpAmp

&7575

DrDrive

R G B Y C

RCA (Pr)

SCART (R)

RCA (Y)

SCART (G)

RCA (Pb)

SCART (B)

R/Pr

G/Y

B/Pb

VCRVCRMICOMMICOM

RGB_MUTE "H"

DEDECOCODEDERBOBOX

C+DET "H"

Y

C AV1AV1

JAJACKTVTV

SETSET

CVBS

MOMODULATODULATOR

DVD_CVBS

Y

C

SPI_interfaceDVD_CVBS

AV1

CVBS

AV2AV2JACKJACK

AVCP_VIDEO DVDDVD

BOARDBOARD

AV1 SCAV1 SCART

RGB_OUT "H"

Pin8 Pin16

SCART "H"



3-35 3-36

CIRCUIT DIAGRAMS1. POWER (SMPS) CIRCUIT DIAGRAM

A B C D E F G H I J K L M N O P Q R S T

No PowerD102 is Defective

5.3VA No PowerD123 is Defective

13VA No PowerD122 is Defective

33V No PowerD126 is Defective



13VA No PowerD124 is Defective

3.3V No PowerIC153 is Defective

2.5V NoPowerIC154,D156 are Defective

12V No PowerIC155 is Defective

5V No PowerIC156 is Defective

Switching ErrorIC102,IC103 are Defective

No PowerF101 is Defective

S/W ErrorIC101,IC104 are Defective

No PowerBD101,R101 are Defective



WHEN SERVICING THIS CHASSIS, UNDER NO CIR-CUMSTANCES SHOULD THE ORIGINAL DESIGN BEMODIFIED OR ALTERED WITHOUT PERMISSIONFROM THE LG CORPORATION. ALL COMPONENTSSHOULD BE REPLACED ONLY WITH TYPES IDENTI-CAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIALCOMPONENTS ARE SHADED ON THE SCHEMATIC

FOR EASY IDENTIFICATION. THIS CIRCUIT DIAGRAMMAY OCCASIONALLY DIFFER FROM THE ACTUALCIRCUIT USED. THIS WAY, IMPLEMENTATION OF THELATEST SAFETY AND PERFORMANCE IMPROVE-MENT CHANGES INTO THE SET IS NOT DELAYEDUNTIL THE NEW SERVICE LITERATURE IS PRINTED.

1. Shaded( ) parts are critical for safety. Replace onlywith specified part number.

2. Voltages are DC-measured with a digital voltmeter dur-ing Play mode.

IMPORTANT SAFETY NOTE :

3-37 3-38

2. TUNER CIRCUIT DIAGRAM



3-39 3-40

3. A/V CIRCUIT DIAGRAM

13

3

12

6

79

4 1

2

2

5

101114

8



WAVEFORMS

IC301 Oscilloscope Waveform

IC301 Pins 8, 9PB mode500mvp-p

1

IC301 Pins 15, 17,19, 21Video in 1Vp-p

2

IC301 Pin 31PB/REC mode4.0Vp-p

3

IC301 Pin 98REC mode1.1Vp-p

4

IC301 Pin 94REC mode2.0Vp-p

5

IC301 Pin 29PB mode2.02Vp-p

6

IC301 Pin 57PB mode400mVp-p

7


8

IC301 Pin 73PB/REC mode5Vp-p

9

IC301 Pin 74PB/REC mode5Vp-p

10


13

IC301 Pin 80PB mode3.6Vp-p

14

IC301 Pin 77REC mode340mVp-p

11


12

3-41 3-42

4. HI-FI CIRCUIT DIAGRAM



3-43 3-44

5. SYSTEM CIRCUIT DIAGRAM

3

6

5

7

4

12



WAVEFORMS

IC501 Waveform Photographs

V.HSW(IC501 Pin 23)1V/10mSREC/PB MODE

1

DV.SYNC(IC501 PIN 24)1V/100uSQUE/REV MODE

2

DFG/DFG(IC501 PIN 65)1V/10mSREC/PB MODE

5

CFG(IC501 Pin 67)1V/10mS

6

V.IN(IC501 Pin 49)500mV/20uS

7

CTL(+)(IC501 Pin 74)1V/10mS

3

CTL(-)(IC501 Pin 75)1V/10mS

4

3-45 3-46

6. I/O JACK CIRCUIT DIAGRAM



3-47 3-48

7. HDMI CIRCUIT DIAGRAM (HDMI MODEL ONLY)



3-49 3-50

8. KARAOKE CIRCUIT DIAGRAM (KARAOKE MODEL ONLY)



3-51 3-52

9. VIDEO/AUDIO CODEC, MSP CIRCUIT DIAGRAM



3-55 3-56

10-2. 9 TOOL



3-57 3-58

CIRCUIT VOLTAGE CHART



MODEPIN NO.

EE PLAY

IC301 (HA118725)1 20m 100m

2 20m 100m

3 20m 100m

4 1.95V 4.88V

5 1.94V 1.88V

6 2.6V 3.12V

7 2.8V 2.74V

8 2.5V 1.7V

9 2.04V 1.3V

10 1.8V 1.88V

11 2V 1.8V

12 1.6V 0.72V

13 0V 0V

14 1.26V 1.3V

15 3.04V 3.36V

16 0V 4.78V

17 2.38V 2.32V

18 1.88V 2.84V

19 3.02V 2.94V

20 0V 0V

21 2.38V 2.34V

22 4.88V 4.82V

23 2.64V 2.24V

24 0V 0V

25 2.08V 2.14V

26 3.08V 2.66V

27 0V 0V

28 150m 140m

29 3.88V 3.18V

30 2.08V 2.74V

31 4.74V 4.72m

32 2.08V 2.12V

33 2.42V 2.26V

34 1.58V 1.54V

35 3.3V 3.36V

36 2.5V 2.32V

37 3.1V 3.18V

38 2.6V 2.28V

39 1.4V 1.42V

40 2.3V 2.16V

41 1.08V 1.58V

42 1.82V 1.84V

43 2.04V 2.28V

44 0V 0V

45 2.88V 3.04V

46 2V 2.98V

47 4.82V 4.78V

48 120mV 2.4V

49 3.48V 1.94V

50 4.78V 4.74V

51 2.08V 1.98V

MODEPIN NO.

EE PLAY

52 4.8V 4.7V

53 2.6V 2.8V

54 0V 0V

55 1.3V 1.48V

56 0V 0V

57 2.08V 2.18V

58 1.78V 2.14V

59 4.6V 4.62V

60 4.62V 4.62V

61 3.82V 0V

62 2.2V 2.08V

63 2.32V 2.32V

64 1.62V 1.64V

65 1.62V 2.28V

66 2.3V 1.68V

67 0V 0V

68 1.12V 1.14V

69 2.3V 2.38V

70 0.82V 0.82V

71 2.2V 2.18V

72 100m 2.42V

73 4.96V 4.98V

74 4.96V 4.98V

75 2.56V 2.54V

76 2.34V 2.18V

77 2.68V 2.64V

78 0V 4.72

79 0V 0V

80 2.16V 2.68V

81 4.06V 20m

82 0V 0V

83 120m 2.72V

84 2.76V 4.74V

85 2.114V 2.42V

86 2.04V 2.08V

87 2.04V 2.08V

88 0V 0V

89 2.14V 2.08V

90 2.14V 2.08V

91 2.14V 2.08V

92 4.88V 4.89V

93 300m 260m

94 2.48V 2.4V

95 2.48V 1.86V

96 2.06V 1.86V

97 0V 0V

98 2.30V 2.46V

99 0V 20m

100 2.48V 2.42V

IC501 (MM01D10X)

1 0V 0V

2 4.52V 4.82V

MODEPIN NO.

EE PLAY

3 4.84V 4.84V

4 4.64V 4.58V

5 4.56V 4.56V

6 80m 60m

7 0V 0V

8 4.98V 4.98V

9 4.98V 5.3V

10 4.8V 4.8V

11 4.82V 4.82V

12 4.72V 4.82V

13 4.92V 4.92V

14 5.02V 5.02V

15 0V 0V

16 4.98V 4.98V

17 5.04V 5.04V

18 4.98V 9.98V

19 2.46V 2.46V

20 3.36V 3.36V

21 0V 0V

22 0V 0V

23 4.96V 4.96V

24 120m 140m

25 4.94V 4.94V

26 4.92V 4.92V

27 20m 20m

28 5.02V 5.02

29 4.98V 4.98V

30 4.84V 4.84V

31 5V 5V

32 0V 0V

33 4.98V 4.94V

34 0V 5V

35 5.02V 0V

36 3.16V 4.94V

37 5.7V Da/Clk(5.5)

38 0V 5.7V

39 520m 0V

40 4.84V 520m

41 4.83V Da/Clk(5.62)

42 4.86V 4.86V

43 0V 0V

44 5.02V 5V

45 0V 0V

46 3.94V 3.94V

47 2.88V 2.88V

48 0V 0V

49 0.98V 2.94V

50 1.84V 1.94V

51 0.98V 4.78V

52 3.28V 3.28V

53 2.38V 2.38V

54 2.52V 2.54V

MODEPIN NO.

EE PLAY

55 1.88V 1.88V

56 0V 0V

57 0V 0V

58 120m 120m

59 4.92V 4.92V

60 4.92V 4.92V

61 0V 0V

62 4.82V 4.82V

63 3.98V 3.98V

64 0V 0V

65 2.36V 2.63V

66 0V 0V

67 4.68V 9.68V

68 0V 0V

69 2.48V 2.48V

70 2.48V 2.48V

71 0V 0V

72 2.48V 4.98V

73 4.92V 4.92V

74 0V 0V

75 2.52V 2.42V

76 2.42V 2.48V

77 80m 80m

78 0V 0V

79 4.02V 4.96V

80 4.96V 4.96V

81 2.8V 280m

82 1V 2.62V

83 120m 3.24V

84 0V 1.96V

85 0V 0V

86 4.98V 4.9V

87 4.98V 4.98V

88 5V 5V

89 0V 0V

90 4.88V 4.88V

91 0V 0V

92 0V 0V

93 5.04V 5.04V

94 4.88V 0V

95 4.98V 4.98V

96 0V 0V

97 0V 0V

98 4.98V 4.98V

99 20m 4.98V

100 0V 0V

IC801 (TDA9505H)1 3.28V 3.24V

2 3.28V 3.28V

3 3.32V 3.26V

4 3.28V 3.92V

5 3.28V 3.92V

MODEPIN NO.

EE PLAY

6 3.28V 3.26

7 3.28V 3.74V

8 3.28V 3.24V

9 3.28V 3.24V

10 3.28V 3.24V

11 3.28V 3.26V

12 0V 0V

13 3.78V 4.52V

14 0V 0V

15 0V 640m

16 5.82V 6.64V

17 5.82V 6.68V

18 0V 620m

19 6.28V 6.66V

20 6.28V 6.72V

21 4.46V 4.42V

22 3.28V 4.02V

23 3.62V 3.68V

24 3.74V 4.12V

25 3.74V 3.76V

26 0.1V 640m

27 0V 0V

28 3.7V 3.68V

29 3.66V 3.64V

30 0.7V 680m

31 3.72V 3.72V

32 3.74V 4.08V

33 3.62V 3.68V

34 13.4V 13.32V

35 3.62V 520m

36 13.4V 520V

37 580m. 520V

38 0V 0V

39 0V 20m

40 4.7V 4.76V

41 0V 1.68V

42 5V 5.04V

43 5V 4.96

44 20m 3.38

LOCA. NO. SPECPOWER ON PB

REMARKSE C B E C B

PART : SYSTEMQ501 KRC103S-T1 .000V .020V 4.740V .000V 4.900V 4.740V

Q502 KRC103S-T1 .000V .020V 4.750V .000V 4.930V 4.770V

Q503 KTA1273 5.090V 5.070V 4.400V 5.070V 5.050V 4.370V

Q504 KTC3875S .000V .023V .680V 0.000 0.023 0.680

Q508 KTA1273 5.100V 5.040V 4.370V 5.070V 4.980V 4.320V

Q509 A1504 2.810V .000V 2.150V 3.020 0.000 2.360

Q510 A1504 2.700V .000V 1.970V 2.960 0.000 2.360

Q661 KTC3875S .000V 5.050V .000V 0.000 6.900 0.000

Q662 KRC103S-T1 .000V .000V 4.995V 0.000 0.000 4.950

PART : AVCPQ201 KTA1504 2.790 0.000 2.400 3.020 0.000 2.380

Q301 KTC3203 0.000 0.110 0.110 0.000 0.140 0.140

Q302 STB1277 4.940 0.140 4.940 4.930 0.160 4.920

Q303 KTC103S 0.000 4.920 0.043 0.000 4.920 0.037

Q305 KTC3875S 0.000 0.000 0.690 0.000 0.000 0.690

Q306 KTC3875S 0.000 0.000 0.700 0.000 0.000 0.700

Q307 KRA103S 4.910 4.890 0.043 4.880 4.870 0.037

Q310 KTA1504 2.890 0.000 2.040 3.020 0.000 2.360

PART : HI-FI/F.JACK/AMPQ801 STD1862LY 5.000 5.100 5.730 5.000 5.130 5.750

Q802 STD1862LY 11.630 14.150 12.230 11.620 13.750 12.230

Q803 KTA1268 34.700 34.400 34.000 34.300 34.100 33.600

Q804 KTC3198 0.000 0.011 0.630 0.000 0.010 0.630

Q8K1 KTC3875 0.001 0.004 0.699 0.001 0.004 0.701 W/Karaoke

Q8K2 KTA1504 4.944 4.931 4.211 4.916 4.903 4.182 W/Karaoke

Q8K3 KRC103S 0.001 0.030 4.158 0.001 0.032 4.138 W/Karaoke

Q8K4 KTC3875 0.001 0.004 0.700 0.001 0.004 0.702 W/Karaoke

PART : JACKQ901 KTA1504 .000V 5.180V 4.470V .000V 5.170V 4.450V

Q902 KTC3875S .000V .000V .690V .000V .000V .694V

Q903 KTC3875S .000V .000V .698V .000V .000V .694V

Q904 KRC103S .000V .027V 3.980V .000V .056V 2.250V

Q906 KRC103S .000V .027V 3.980V .000V .055V 2.250V

Q907 KTA1504 5.160V 5.150V 4.470V 5.160V 5.170V 4.460V

Q908 KTA1504 2.330V .000V 1.670V 2.330V .000V 1.680V

Q909 KTC3875S .000V .000V .725V .000V .000V .721V

Q910 KTC3875S 5.090V 4.990V 4.960V 6.530V 4.930V 5.050V

Q911 KTC3875S .000V .000V .695V .000V .000V .690V

Q912 KTC3875S .000V .000V .695V .000V .000V .690V

Q913 KTC3875S .000V .000V .725V .000V .000V .721V

Q914 KTC3875S .000V .000V .726V .000V .000V .722V

TR

3-59 3-60Copyright 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes



REMARKSVOLTAGE(+) VOLTAGE(-) VOLTAGE(+) VOLTAGE(-)

PART : SYSTEMC502 47uF/50V 14.170V -.035V 13.730V -.013V

C507 47uF/25V 14.180V -.035V 13.740V -.013V

C515 4.7uF/50V 4.120V .000V .120V .000V

C521 47uF/6.3V 5.160V .008V 5.090V .000V

C523 0.047uF/6.3V 5.090V .000V 5.040V .000V

C524 470uF/6.3V 5.090V .000V 5.050V .000V

C533 1000uF/6.3V 4.970V .000V 4.730V .000V

C534 10uF/16V 4.800V .008V 4.740V .000V

C542 47uF/6.3V 5.090V .000V 5.030V .000V

C544 1uF/50V 2.790V 2.370V 2.980V 2.470V

C546 33uF/16V 2.800V 1.690V 3.020V 1.910V

C547 10uF/16V 4.870V .000V 4.850V .000V

C554 22uF/16V 2.560V .000V 2.550V .000V

C555 22uF/16V 2.560V 2.560V 2.550V 2.550V

C556 100uF/16V 2.560V .000V 2.550V .000V

C691 47uF/6.3V 3.270V .000V 3.270V .000V

C693 47uF/6.3V 5.100V .000V 5.070V .000V

PART : AVCPC203 1.0u/50V 3.55 0.00 3.55 0.00

C204 1.0u/50V 0.41 0.00 3.72 0.00

C207 0.47u/50V 2.88 0.00 1.77 0.00

C210 0.47u/50V 1.67 0.00 2.40 0.00

C213 2.2u/50V 2.28 0.00 1.94 0.00

C215 47u/16V 4.72 0.00 4.69 0.00

C301 47u/6.3V 4.98 0.00 4.94 0.00

C303 0.33u/50V 0.36 0.00 0.37 0.00

C305 4.7u/50V 2.49 0.02 2.49 0.02

C308 4.7u/50V 2.23 0.02 2.56 0.02

C309 22u/16V 2.52 0.00 2.52 0.00

C310 22u/16V 2.58 0.00 2.58 0.00

C314 47u/16V 0.14 0.00 0.16 0.00

C317 10u/16V 2.13 0.00 2.11 0.00

C319 10u/16V 2.83 0.00 2.84 0.00

C327 2.2u/50V 2.06 0.00 1.90 0.00

C328 47u/6.3V 4.95 0.00 4.92 0.00

C329 1.0u/50V 2.81 0.00 2.81 0.00

C331 1.0u/50V 2.80 2.26 2.69 2.18

C337 0.1u/50V 2.39 2.09 2.31 1.84

C339 3.3u/50V 1.49 0.00 1.46 0.00

C340 10u/16V 3.37 2.09 3.01 2.10

C343 47u/6.3V 4.91 0.00 4.88 0.00

C350 47u/6.3V 4.92 0.00 4.89 0.00

C353 3.3u/50V 2.90 0.00 3.18 0.00

C355 2.2u/50V 2.87 0.00 3.18 0.00

C358 1.0u/50V 0.97 0.00 0.96 0.00

C359 4.7u/50V 2.65 0.00 2.81 0.51

C361 1.0u/50V 2.81 0.00 2.65 0.00

C364 0.33u/50V 4.63 0.00 4.61 0.00

C366 47u/6.3V 4.86 0.00 4.85 0.00

C375 1u/16V 2.77 0.96 2.80 0.96

PART : AV DECODERC401 47u/6.3V 3.21 0.00 3.17 0.00

C402 47u/6.3V 1.79 0.00 1.79 0.00

CAPACITOR



C406 47u/6.3V 3.23 0.00 3.19 0.00

C435 47u/6.3V 1.79 0.00 1.79 0.00

C443 47u/6.3V 1.77 0.00 1.77 0.00

C454 47u/6.3V 3.19 0.00 3.19 0.00

C468 47u/6.3V 3.19 0.00 3.19 0.00

C470 10u/16V 1.60 0.00 1.58 0.00

C474 47u/6.3V 3.19 0.00 3.19 0.00

C942 47u/6.3V 4.89 0.00 4.89 0.00 DAC

C943 10u/16V 2.42 0.00 2.42 0.00 DAC

PART : HI-FI/F.JACK/AMPC806 10uF/16V .009V .008V .008V .008V

C807 0.47uF/50V .092V .008V .750V .009V

C808 10uF/16V 6.090V .014V 6.090V .009V

C809 10uF/16V 6.080V .014V 6.090V .009V

C812 10uF/16V 3.860V .080V 3.850V .008V

C814 47uF/16V 3.880V .007V 3.880V .008V

C815 10uF/16V .796V .008V .790V .008V

C816 10uF/16V 3.860V .008V 3.870V .008V

C817 10uF/16V .800V .008V 0.79 0.008

C818 47uF/16V 3.880V .007V 3.870V .008V

C820 10uF/16V 3.850V .008V 3.820V .008V

C822 47uF/16V 11.530V .008V 11.510V .009V

C825 47uF/6.3V 4.890V .008V 4.880V .009V

C827 47u/6.3V 3.200V .000V 3.200V .000V

C834 10uF/16V 6.890V 6.080V 6.800V 6.080V

C835 10uF/16V 6.880V 6.080V 6.790V 6.080V

C848 47uF/16V 11.560V .000V 11.570V .000V

C850 22uF/16V 5.780V .000V 5.790V .000V

C853 22uF/16V 5.780V 1.590V 5.790V 1.590V

C853 22uF/16V 5.988V 2.350V 5.986V 2.360V DAC related

C855 22uF/16V 5.780V 1.590V 5.780V 1.588V

C855 22uF/16V 5.987V 2.370V 5.987V 2.359V DAC related

C858 22uF/16V 5.790V .000V 5.780V .000V

C859 22uF/16V 5.780V .000V 5.780V .000V

C863 220uF/6.3V 5.000V .000V 4.990V .000V

C864 10uF/50V 11.610V .000V 11.590V .000V

C865 4.7uF/50V 5.760V .000V 5.750V .000V

C866 4.7uF/50V 12.220V .000V 12.210V .000V

C867 22uF/16V 1.615V 1.300V 1.610V 1.300V

C868 22uF/16V 1.612V 1.410V 1.610V 1.390V

C875 220uF/6.3V 1.270V .000V 1.270V .000V

C878 10uF/16V 1.790V .000V 1.790V .000V

C885 100u/6.3V 4.950V .000V 4.950V .000V

C8K1 10u/16V 5.967V .004V 5.977V .004V W/ Karaoke




PART : JACKC901 47u/16V 4.940V .000V 4.870V .000V

C902 47u/16V 11.480V .000V 11.530V .000V

C904 10u/16V 1.050V .007V 1.030V .007V

C905 10u/16V 1.050V .007V 1.030V .007V

C907 10u/16V 6.900V 6.840V 6.770V 5.700V

C908 10u/16V 6.880V 5.850V 6.780V 5.630V



C929 10u/16V 6.880V .000V 6.780V .000V

C930 10u/16V 6.880V .000V 6.760V .000V

C938 10u/16V 1.410V .430V 1.460V .500V

C940 10u/16V 1.400V .430V 1.460V .500V

C946 22u/16V 2.370V .000V 2.330V .000V

C959 470u/6.3V 2.440V .011V 2.410V .011V

C961 220u/6.3V 2.450V .011V 2.410V .010V

C962 470u/6.3V 2.460V .011V 2.420V .010V

C963 470u/6.3V 1.860V 1.760V 2.000V 1.890V

C964 220u/6.3V 2.440V 2.340V 2.400V 2.300V

C965 10u/16V 6.330V 4.900V 6.240V 4.700V

C966 10u/16V 6.340V 5.000V 6.240V 4.800V

C967 470u/6.3V 3.300V 3.200V 2.000V 1.880V

C968 10u/16V 6.340V .009V 6.250V .010V

C969 10u/16V 6.340V .009V 6.250V .010V

C970 470u/6.3V 1.870V 1.480V 2.000V 1.610V

C984 10u/16V 1.670V .007V 1.680V .007V

PART : TUNER & VPSC703 470u/10V 4.790V .009V 4.780V .008V

C710 4.7u/50V 34.700V .009V 34.200V .009V

C7A1 47u/16V 5.110V .009V 5.080V .009V

C7N1 10uF/16V .550V .640V .528V .580V

C7N2 10uF/16V 1.290V .024V .650V .640V

C7N3 10uF/16V .025V .000V .048V .000V

C7N4 10uF/16V .057V .000V .046V .000V

C7S1 220u/6.3V 4.770V .005V 4.760V .048V S Model

C7S2 10u/16V 4.770V .009V 4.760V .009V S Model

PART : HDMIC1727 10uF/10V(T) 3.15 0.00 3.15 0.00

C1728 10uF/10V(T) 3.15 0.00 3.15 0.00

C1729 22uF/10V(T) 1.76 0.00 1.76 0.00

C1730 22uF/10V(T) 3.15 0.00 3.15 0.00

LOCA. NO. SPEC REC P/OFF


PART : POWERC103 68u/450 284.00 0.00 289.00 0.00

C109 33u/35 17.00 0.00 17.00 0.00

C122 1000u/25 13.74 0.00 13.64 0.00

C123 2200u/16 5.25 0.00 5.27 0.00

C124 1000u/25 14.04 0.00 16.41 0.00

C126 47u/50 34.30 0.00 38.60 0.00

C127 2200u/16 3.74 0.00 5.47 0.00

C128 1000u/16 5.71 0.00 7.03 0.00

C132 470u/25 13.74 0.00 16.22 0.00

C133 1000u/10 5.20 0.00 5.26 0.00

C137 1000u/10 3.70 0.00 5.48 0.00

C152 220u/6.3 3.26 0.00 0.00 0.00

C154 220u/6.3 2.43 0.00 0.00 0.00

C155 100u/16 11.92 0.00 0.00 0.00

C156 100u/16 4.97 0.00 0.00 0.00

CE (INPUT : 230V)

3-61 3-62

PRINTED CIRCUIT BOARD DIAGRAMS1. VCR P.C.BOARD(TOP VIEW)



3-63 3-64

VCR P.C.BOARD(BOTTOM VIEW)



3-65 3-66

2. SMPS P.C.BOARD(TOP VIEW) (BOTTOM VIEW)

3. KARAOKE P.C.BOARD (KARAOKE MODEL ONLY)(TOP VIEW) (BOTTOM VIEW)





VDR PARTVDR ELECTRICAL TROUBLESHOOTING GUIDE

1. NO COMPONENT VIDEO SIGNAL WHEN PLAYING DISC

Component :No Y Signal

R905 R904 YES

R903YES YES

YES

Component :No Pb Signal

YES

Component :No Pr Signal

YES

NONONO Replace Q909,Q913, Q914

NO

Check the PVM02 Pin44 Check the PVM02 Pin42 Check the PVM02 Pin40

CheckConnection ofthe Connector

(PVM02)

YES

YES

Check theComp-mute Hsignal. (Q909,Q913, Q914)

IC901 - Pin19Check input

IC901 Pin21Check input

YES IC901 Pin22Check input

YES YES

YES YES YES

NONONO

IC901Pins24, 25, 26.signal check.

Check IC1101 Powerand Other Circuits

Checkthe PVM02 Pin42.

L1313 CheckSignal in DVD

Board

YES

NO

RepalcePMV01, PVM02



2. NO COMPOSITE/S-VIDEO SIGNAL WHEN PLAYING DISC

COMPOSITE :No Signal

R911 L913YES

L912YES

YES

S-VIDEO :No Y Signal

YES

S-VIDEO :No C Signal

YES

NONONO

C938 C940 C939


CheckTP1 on DVD

Board.


YES IC901 Pin13Check input

YES YES

NONONO

NONONO

YES

IC901Pins36, 39No Signal

IC901 Replace

Check TP3 and TP5on DVD Board.

IC901 Pins29(C), 27(Y).Signal Check

NO NONO

Check IC1101 Powerand Other Circuits

Check IC1101 Powerand Other Circuits IC901 Replace

CheckConnection ofthe PMV01,

PVM02

YES

YES

VDR ELECTRICAL TROUBLESHOOTING GUIDE



3. NO TV, EXTERNAL INPUT VIDEO SIGNAL

No : TV signal

IC901 Pin1 IC901 Pin4NO

YES

No : AV1 signal

YES

Check Sihnal 2C901Pin7(Input), Pin42(Output)

YES

IC301 Pin15(Input)

YES

IC901 Pin42Check output

YES

No : AV2 signal

YES

IC301 Pin17NO

ReplaceX401 X-TAL

NO

AV3

YES

YESYESYES

Check IC1101(Power and other Circuits)

Check X401 ClockOscillated.

IC401Pin51 : HIGH/RST_VDEC

NONO

YES

CheckIC401 Pin72

(VI_CLK)

NO

YES

Checkthe I2C Signal(SDA/SCL) of the 2C401

Pins44, 45NO

YES

Check IC401 Power andother Circuits.

CheckIC401 Pins57, 58,...

(VI_D0~VI_D7)

NO

YES

TU701 Pins1-19 Checksignal And circuit

YES

IC301 Pin29 Check(Output)

YES

Q310 Collector Sgnal,Power 12V

YES

Check Signal of theIC401 Pin29

Check




When playing disc, no audiooutput (In vcr board)

L905, L906 :Is there a Signal?

NOCheck IC402 Pin11 (Vcc)

Replace IC402

Check IC901 Pins11, 12Check IC901 Power and

Other Circuit.

Check Q403, Q404,Q901~904 Q906, Q907,

Q911, Q912

NO NO

YES

YES

YES

YES

IC402Pins14, 15 (Audio_out R/L) : Is there a

Signal?

IC402Pins1, 16(Z_mute

H): IC501 Pin58(A_muteH): IC501 Pin56

(D_mute H):

4. WHEN PLAYING DISC, NO AUDIO OUTPUT (IN VCR BOARD)

NO

IC1101 DefectNO

Replace PMI01, PVM02NO

YES

YES

Check Cable connection& TV Audio mute

YES

Check PMI01, PVM02PMI01 : Pins22, 23, 24, 26PVM02 : Pins25, 27, 28, 29

IC901Pins37, 38 : Is there

a Signal?

Check IC1101AR1105 (AO_DO,

AO_MCLK, AO_SCLK,AO_FSYNC)

: .

CheckIC402 Pins2~4

(SPI) : Pins5~8(I2S) : Pin10(reset) : Pin7, 8(I2C):




NONOIC1101 DefectCheck IC1101 Power andOther Circuit

Check L920 : Check Vcc(T5.0V) of the JK902

Check PMI01 Pin25(SPDIF)

YES

R1105 :

NO Check PCB Pattern betweenPVM02 Pin26 and R923

YES

Check JK902 & JK901Cable Connection

YES

No Optical/Digital Output

5. NO OPTICAL/DIGITAL OUTPUT

Check R923 :




6. SYSTEM CIRCUIT PART (DISPLAY HELLOW ON THE WINDOW)

SYSTEM CIRCUIT PART(Display HELLOW on

the Window)

Check IC501Circuit on VCR

NO

Check PCB Pattern between L1105,L1141, L1104, L1110 and PMS01

Check PCB Pattern between L1105,L1141, L1104, L1110 and PMS01

NO

YES

Check SMPS Circuit

Check IC1301Pin29~45 HD Signal

Replace IC1101

Check the Loader Part

CheckPowers on DVDL1105 --> 1.25VL1141 --> 2.5VL1104 --> 3.3VL1110 --> 5V

CheckIC1201 Pin45, 46.

(SDRAM_CLK)The Frequency

is about 162MHz?

NOCheck PMS01

Pin2,3 --> 1.25VPin4 --> 2.5V

Pin5, 6 --> 3.3VPin9 --> 5V

NO

NO

NO

YES

Replace X1101

CheckIC1301

Pin11, 12, 26, 28Pin11 --> Flash_WEPin12 --> SYS_RSTPin26 --> Flash_CSPin28 --> Flash_OE

NOCheck X-tal X1101 :13.5MHz

NO

YES

CheckIC1302(Pin2~23)

BA Signal andPin25(E5_ALE)

CheckSDRAM_CLK :

About 162MHz --> YesAbout 80MHz -->

NO

YES

Check IC501Pin10 is H on VCR

Board?

YES

Check R1303 :E5_RST --> H

YES

Replace IC1302NO

Replace IC1301NO

YES

YES

YES

YES




1. SYSTEM BLOCK

WAVEFORMS

1

Main Clock

Frequency=13.5MHz

2

DDR RAM Clock

Pins45,46

Frequency=162MHz

1

2



3

5

6

4

DDR Bank Address

4

5

DDR RAS & CAS

6

DDR Write Enable

Pin21

Pin22

Pin23

3Pins26, 27



2. DV BLOCK (TPA, TPB)

43

21

1

2

3

4



3. USB BLOCK (D)

1

2

1

2

3-81 3-82

BLOCK DIAGRAMS1. VDR SET TOTAL BLOCK DIAGRAM

VCRVCR BOARD

DVD RW DRIVE

REREAR JACACK

FRONT ONT JACK CK BOARDOARD

ATA_RESET

ATA_address[4:0]

ATA_data[ 15:0]

DIOR / DIOW / DMAACK

AV3_IN

DV

V3_IN

A3_IN

USB VCC,PO/MO

2

3

TP4

4

DV

D_reset

HD

MI C

EC

SP

I

IEC

958

SCART 1

2 Y/C

Y/C

S_Jack

2 A_R/L

SW_V_CVBS

3 YPbPr / RGBYPbPr

CoaxialOptical COAXIAL

OPTICAL

TUNER

TU_AV_in 2

4

VI _ C

LK

I2C (S

CL/S

DA

)

E5_ Y

/Pb/P

rRG

B

AO

_ I2S (A

udio)

4

E5_ C

VB

S

3

ATA_INT / IORDY / DMARQ

SIF

E5_ Y

/C

2

DSCL/D SDA

HDMI_ CEC

KARAOKE BOARDKARAOKE BOARD

HDMI BOARDHDMI BOARD

MIC_DET

MIC_IN2

AV1_IN 3

DVD DVD

TP(1395

Sig

nal)

USB

HDMITX_SIGNAL8

3 US

B S

ignal

8 Vi _ D[0

:7]

DV

D IR

UA

RT

(TX/R

X)

AI _ I2S

(Audio)

4

VO

_ D[0:7]

8

VO

_ CLK

HD

MI IR

Q

HD

MI _ R

ST

VC

EC

IRQ

V

DE

C _ R

ST

HDMI _ CEC

HDMI _ IRQ

HDMI _ SCL SDA

SCART 2

V_CVBS

AV2 _ IN 3

3 R/G/B

3 IN _ R/G /B



3-83 3-84

2. VDR MAIN H/W BLOCK DIAGRAM

Optical Audio Output

UART2_TXUART2_RX S/W Debug Port

DDR SDRAM32M x 16 x 162MHz

DDR Interface

40CLKICLKO13.5MHz

Protect Circuit4

USB_0 Interface3

USB Input

DVD_IR IR Output

CVBS Output

S-VIDEO Output

COPONENT Output

2

3

CVBS_OUT

Y/C_OUT

Y/Pb/Pr_OUT

5JTAG Interface

U-COM

DVD_RESETSPI_CS0SPI_MISOSPI_MOSISPI_CLK

AUDIO DAC(PCM1780)

AO_D0AO_MCLKAO_SCLKAO_FSYNCSPI_CS1

DECORDER

(SAA7138)

AI_FSYNAI_SCLKAI_MCLKAI_DO

SCLSDA

8VI_CLKVI_D[2:9]/VDEC_RST/VDEC_IRQ

HDMI

/HDMI_RST/HDMI_IRQVO_CLKVO_D[0:7]AO_IEC958

8

ATAPI_DATA[0:15]ATAPI_CONTROL

16

12DSP(MN103SC7G)

8 4 1394 DV InputPHY(TSB41AB)BIO_PHY_DATA [0:7]BIO_PHY_CONTROL

7

Flash MemoryBA[1:5,22]

HD[0:15]

Latch

DMN8603 DVD VCR

DDR SDRAM32M x 16 x 162MHz

40



3-85 3-86

3. DVD POWER BLOCK DIAGRAM

PMS012

3 E5_1V254 2.5V5

63V3D+3.3V

8 1.8V9 E5_5VD

+5V5VD

10+12V

2.5V

IC1203G2995F1UF

VDD_CORE

E5_1V25 3V3D

AVDD33_DACDAVDD33_DACAVDD33_USB

VDD33_IOAVDD33_VIDPLL

AVDD33_DCXOAVDD33_VREF

E5 _5VD

BIAS_5V

VDD_DRAMSDRAM_VREF

1.25V

3.3V

5V

2.5V

1.25V

1.25V

IC1201,1202HYB25D512160CE

VREF VTT

IC1101DMN8603

IC130274LV16373ADGG

IC1301MX29LV320CTTC

IC1601TSB41AB1PHP

DVDDAVDD

PLLVDD

V33PHY

PMH011

225

2628

29

30

5VD

3V3D

1.8V

LIC601AP1122EA

VDD

VDDVPPEX

DRAMVDDAVDD_TXAVDD_RX

AVDD

VDD

1.2V

3.3V

5V

LIC201MN103SC7G

3.3V +1.2VD +3.3V +5V

VCC

VCC

3.3V5V

LIC101AN22117A

VHALF

VHALFSVREFSTMD

STMDNHDVREF

CORF

VC

DVCCAVM

VHALF

5V

LIC301BD7776

VCCLDVMSLVMSPVM

VHALF

12V

+12V

VHALF

HDVREF

LPM10120

2644

+5V



3-87 3-88

4. AUDIO IN/OUT BLOCK DIAGRAM

SAA7138SAA7138

HDMIHDMIBOBOARDARD

SSIFSSIFPROCESSORPROCESSOR

Documents

LG RC389H