U.S.A.

Yorkville Sound Inc.4625 Witmer Industrial Estate

Niagara Falls, New York14305 USA

Voice: (716) 297-2920Fax: (716) 297-3689

WORLD HEADQUARTERS

WEB ACCESS: http://www.yorkville.com

CANADA

Yorkville Sound550 Granite CourtPickering, Ontario

L1W-3Y8 CANADA

Voice: (905) 837-8481Fax: (905) 837-8746

Quality and Innovation Since 1963Printed in Canada

SERVICE MANUAL

IMPORTANT SAFETY INSTRUCTIONS

safety-4v3.eps • Oct. 26/05

CAUTION:TO REDUCE THE RISK OF ELECTRIC SHOCK, DO

NOT REMOVE COVER (OR BACK).

NO USER SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIEDSERVICE PERSONNEL.

INSTRUCTIONS PERTAINING TO ARISK OF FIRE, ELECTRIC SHOCK,

OR INJURY TO PERSONS

Read InstructionsThe Owner’s Manualshould be read and understood before operation of your unit. Please, save these instruc-tions for future reference.PackagingKeep the box and packaging materials, in case the unit needs to be returned for service.WarningWhen using electric products, basic precautions should always be followed, including the following:

Power SourcesYour unit should be connected to a power source only of the voltage specified in the owners manual or as marked on the unit. This unit has a polarized plug. Do not use with an extension cord or receptacle unless the plug can be fully inserted. Precautions should be taken so that the grounding scheme on the unit is not defeated.

HazardsDo not place this product on an unstable cart, stand, tripod, bracket or table. The product may fall, causing serious personal injury and serious damage to the product. Use only with cart, stand, tripod, bracket, or table recommended by the manufacturer or sold with the product. Follow the manufacturer’s instructions when installing the product and use mounting accessories recommended by the manufacturer.

The apparatus should not be exposed to dripping or splashing water; no objects filled with liquids should be placed on the apparatus.

Terminals marked with the “lightning bolt” are hazardous live; the external wiring connected to these terminals require installation by an instructed person or the use of ready made leads or cords.

Ensure that proper ventilation is provided around the appliance.

No naked flame sources, such as lighted candles, should be placed on the apparatus.

Power CordThe AC supply cord should be routed so that it is unlikely that it will be damaged. If the AC supply cord is damaged DO NOT OPERATE THE UNIT.

ServiceThe unit should be serviced only by qualified service personnel.

AVIS:AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE,

N’ENLEVEZ PAS LE COUVERT (OU LE PANNEAU ARRIERE)

NE CONTIENT AUCUNE PIECEREPARABLE PAR L’UTILISATEUR.

CONSULTEZ UN TECHNICIEN QUALIFIEPOUR L’ENTRETIENT

INSTRUCTIONS RELATIVES AU RISQUEDE FEU, CHOC ÉLECTRIQUE, OUBLESSURES AUX PERSONNES

Veuillez Lire le ManuelIl contient des informations qui devraient êtres comprises avant l’opération de votre appareil. Conservez S.V.P. ces instructions pour consultations ultérieures.EmballageConservez la boite au cas ou l’appareil devait être retourner pour réparation.Attention:Lors de l’utilisation de produits électrique, assurez-vous d’adhérer à des précautions de bases incluant celle qui suivent:

AlimentationL’appareil ne doit être branché qu’à une source d’alimentation correspondant au voltage spécifié dans le manuel ou tel qu’indiqué sur l’appareil. Cet appareil est équipé d’une prise d’alimentation polarisée. Ne pas utiliser cet appareil avec un cordon de raccordement à moins qu’il soit possible d’insérer complètement les trois lames. Des précautions doivent êtres prises afin d’eviter que le système de mise à la terre de l’appareil ne soit désengagé.

RisqueNe pas placer cet appareil sur un chariot, un support, un trépied ou une table instables. L’appareil pourrait tomber et blesser quelqu’un ou subir des dommages importants. Utiliser seulement un chariot, un support, un trépied ou une table recommandés par le fabricant ou vendus avec le produit. Suivre les instructions du fabricant pour installer l’appareil et utiliser les accessoires recommandés par le fabricant.

Il convient de ne pas placer sur l’appareil de sources de flammes nues, telles que des bougies allumées.

L’appeil ne doit pas être exposé à des égouttements d’eau ou des éclaboussures et qu’aucun objet rempli de liquide tel que des vases ne doit être placé sur l’appareil.

Assurez que lappareil est fourni de la propre ventilation.

Les dispositifs marqués d’une symbole “d’éclair” sont des parties dangereuses au toucher et que les câblages extérieurs connectés à ces dispositifs de connection extérieure doivent être effectivés par un opérateur formé ou en utilisant des cordons déjà préparés.

Cordon d’AlimentationÉvitez d’endommager le cordon d’alimentation. N’UTILISEZ PAS L’APPAREIL si le cordon d’alimentation est endommagé.

ServiceConsultez un technicien qualifié pour l’entretien de votre appareil.

SR-300YS No. Description Qty. YS No. Description Qty.

3747 CUSTOM .5 LED SPACER BLACK 7 4597 22AWG STRAN TC WIR JMP 116405 RED 3MM LED 1V7 5MA BRT 2 5299 24AWG SOLID SC WIR RAD JMP 76400 YEL 3MM LED 1V9 6MA HIGHEFF 2 4749 5.0W 0R15 5% BLK RES 46401 GRN 3MM LED 1V9 6MA HIGHEFF 3 4748 2.0W 3R9 5% T&R 26825 1N4148 75V 0A45 DIODE T&R 41 2008 1.0W 10R 5%FLAME PROOF T&R RES 26438 1N4004 400V 1A0 DIODE T&R 2 4605 1/8W 10R 5% T&R RES 46827 1N5402 200V 3A0 DIODE 4 2014 1/8W 33R 2%FLAME PROOF T&R RES 66434 6A2 200V 6A0 DIODE 4 4604 1/4W 33R2 1% T&R RES 46733 BAT85 30V 0A2 DIODE SCHTKYT&R 4 4811 1/4W 68R 5% T&R RES 26461 1N5240BRL 10V0 0W5 ZENER 5% T&R 2 4735 1.0W 100R 5% T&R RES 26824 1N5246B 16V0 0W5 ZENER 5% T&R 6 4852 1/4W 100R 5% T&R RES 16463 1N5251BRL 22V0 0W5 ZENER 5% T&R 1 4921 1/4W 100R 5% .2"U T&R RES 15101 BC550C TO92 NPN TRAN T&R TB 8 4897 1/4W 120R 5% T&R RES 25102 BC560C TO92 PNP TRAN T&R TB 11 2020 1/8W 150R 2%FLAME PROOF T&R RES 45103 MPSA06 TO92 NPN TRAN T&R TA 2 4986 1/4W 270R 5%MINI T&R RES 25104 MPSA56 TO92 PNP TRAN T&R TA 2 2025 1/8W 274R 1%FLAME PROOF T&R RES 46780 MPSA56 TO92 PNP TRAN TA 2 4950 1/4W 390R 5% .2"U T&R RES 65119 2N5638 TO92 NCH JFET T&R TC 2 4821 1/4W 470R 5% T&R RES 36810 MJF15030 T221D NPN TRAN TJ 2 2030 1/8W 681R 1%FLAME PROOF T&R RES 26811 MJF15031 T221D PNP TRAN TJ 2 4869 1/4W 750R 5% T&R RES 26814 MJF6668 T221D PNP TRAN DARL TJ 1 4758 1/4W 953R 1% T&R RES 66815 MJF6388 T221D NPN TRAN DARL TJ 1 4823 1/4W 1K 5% T&R RES 46988 MJL21194 TO3P NPN TRAN TK 2 4981 1/4W 1K 5%MINI T&R RES 26991 MJL21193 TO3P PNP TRAN TK 2 4824 1/4W 1K5 5% T&R RES 26840 MC33078P IC DUAL OP AMP 2 4988 1/4W 1K5 5%MINI T&R RES 16882 TL072CP IC FET DUAL OP AMP 5 4808 1/4W 2K 5% T&R RES 26884 NE5532N IC DUAL OP AMP 1 4705 2.0W 2K2 5% BLK RES 46745 LM13600N IC XCONDUCTANCE AMP 1 4847 1/4W 2K2 5% T&R RES 16880 4N35 OPTO-COUPLER 2 6124 1/4W 3K 5%MINI T&R RES 26467 10K 10% THERMISTOR NTC TO-92 2 4992 1/4W 3K16 1% T&R RES 45200 _10P 200V 5%CAP T&R RAD CER.2"NPO 2 4756 1/4W 4K120 0.1% *** T&R RES 25406 _33P 50V 10%CAP BLK BEAD NPO 2 4943 1/4W 4K7 5% .2"U T&R RES 25410 100P 100V 10%CAP T&R BEAD NPO 2 6121 1/4W 6K98 1%MINI MF T&R RES 25416 470P 50V 10%CAP T&R BEAD NPO 2 4787 1/4W 7K960 0.1% *** T&R RES 25206 __1N 400V 5%CAP T&R RAD .2"FLM 4 4762 1/4W 9K760 0.1% *** T&R RES 85422 __1N 50V 10%CAP T&R BEAD NPO 2 4829 1/4W 10K 5% T&R RES 25423 __1N2 50V 10%CAP T&R BEAD X7R 2 4940 1/4W 10K 5% .2"U T&R RES 86451 __4N7 250V 20%CAP BLK 'Y' 10MM AC 1 4983 1/4W 10K 5%MINI T&R RES 35204 _10N 100V 10%CAP T&R RAD .2"FLM 4 4856 1/4W 12K 5% T&R RES 26435 _22N 275V 20%CAP BLK 'X2' 15MM AC 1 4953 1/4W 12K 5% .2"U T&R RES 25224 _47N 100V 10%CAP T&R RAD .2"FLM 2 4830 1/4W 15K 5% T&R RES 25227 _82N 100V 5%CAP T&R RAD .2"FLM 2 4954 1/4W 18K 5% .2"U T&R RES 25228 100N 100V 5%CAP T&R RAD .2"FLM 16 6123 1/4W 20K0 1%MINI MF T&R RES 105314 100N 50V 10%CAP T&R BEAD X7R 2 4833 1/4W 27K 5% T&R RES 35231 220N 63V 10%CAP T&R RAD .2"FLM 6 4956 1/4W 27K 5% .2"U T&R RES 15255 __1U 63V 20%CAP T&R RAD .2"EL 1 6122 1/4W 33K 5%MINI T&R RES 25257 __2U2 63V 20%CAP T&R RAD .2"EL 3 4794 1/4W 37K90 0.1% *** T&R RES 25281 _10U 16V 20%CAP T&R RAD .2"NP 4 4878 1/4W 43K 5% T&R RES 25260 _22U 50V 20%CAP T&R RAD .2"EL 1 4834 1/4W 47K 5% T&R RES 25961 _33U 16V 20%CAP T&R RAD .2"NP 6 4761 1/4W 60K4 1% T&R RES 25267 100U 25V 20%CAP T&R RAD .2"EL 4 4898 1/4W 91K 5% T&R RES 45630 330U 25V 20%CAP BLK 10X13MM EL 4 4942 1/4W 100K 5% .2"U T&R RES 25869 4700U 63V 20%CAP BLK 25X40MM ELS 2 6120 1/4W 100K 5%MINI T&R RES 64390 _10K AUD 16MM DETENT P22 2 4991 1/4W 133K 1%MINI T&R RES 24522 __4K7 TRIM POT 2 4796 1/4W 180K 5%MINI T&R RES 2

714 1.5 MIL X 36" CLEAR POLY SHEETING 4 4841 1/4W 220K 5% T&R RES 23819 ___5UH COIL 18AWG R000 AIR CORE 2 6135 1/4W 270K 5%MINI T&R RES 23489 CLIP 250X032 18-22AWG DISCO/INSL 3 4880 1/4W 680K 5% T&R RES 23491 CLIP 205/187X020 18-22AWG DISCO/INS 1 4845 1/4W 2M2 5% T&R RES 13682 250 MALE PCB TAB BULK CARTRIGE 7 4809 1/4W 10M 5% T&R RES 23452 BND POST PCB MT HORZ QUAD ASSEMBLY 1 4751 1/4W 22M 5% T&R RES 23498 1/4" JCK PCB MT HORZ 2 3690 _8" 4C-28AWG RIB 1 W/LCK HDR 098 23528 1/4" JCK PCB MT HORZ GOLD TR_ 2 3574 _9" 5C-22AWG RIBBON CABLE 0.1" 23451 EYELET SMALL 0.089 OD PLATED 5 3603 16" 13C-24AWG RIBBON CABLE 0.1" 13412 LOWPROFILE FUSEHOLDER 1/4" LITTLEFS 1 8870 #4 X 1/4 PAN PH TYPE A ZINC 23414 INTERNATIONAL PC MOUNT FUSEHOLDER 4 8865 4-40 X 5/16 PAN PH MS JS500 42427 5.0 AMP SLO-BLO .25X1.25 FUSE 1 8861 4-40 X 3/8 PAN PH MS JS500 22405 10.0 AMP SLO-BLO .25X1.25 FUSE 2 8801 6-32 X 3/8 PAN PH TAPTITE JS500 28434 AP SERIES PLASTIC HANDLE PAIR 2 8829 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 223501 B52200F006 COMP WASH #4 SMALL 2 8824 8-32 X 5/16 PAN QUAD TAPTITE JS500 143745 DUAL XSISTOR PBL SPRING PLATE ZN 2 8869 8-18 X 1/2 THRD CUTTING FOR PLASTIC 43885 XSISTOR SPRING CLIP TO-220 4 8999 8-32 X 5/8 PAN PH TAPTITE JS500 73795 #8 GROUND LUG ZIERICK 505-169 1 8765 1/4-20 X 2 1/2 HEX HD MS JS500 BLK 13810 4" NYLON CABLE TIE 4 8607 3/16 NYLON SPACER OD 1/8 X ID .063 183827 SQUARE BUMPER BUTTON BLACK 5 3744 SNAP IN .375 SPACER RICHCO 58433 AP SERIES PLASTIC KNOB 2 8818 3/4 OD X 5/16 ID X .08 THICK WASHER 28661 BUTTON KNOB FLAT GREY 2 3511 #6 FLAT WASHER NYLON 23484 8' 3/18 SJT AC LINE CORD 250WH187BL 1 8850 #10 INT TOOTH LOCKWASHER BO 43834 HEYCO #1214 STRAIN RELIEF 1 3436 DPDT PUSH SW PCMT H BREAK B4 MAKE 23593 PCB CONN 90 5 CIR .156 2 3587 DPDT ROKR SW QUIK 250"AC/PWR ON-OFF 13654 PCB CONN 4 CIR .100 LOCKING 2 1248 SR-300 POWER TRANSFORMER T'RD 13655 13 CIR CABLE HOLDER .098 25989 4 CIR CABLE HOLDER .098 28793 4-40 HEX NUT ZINC 28800 6-32 KEPS NUT ZINC 28788 1/4-20 KEPS NUT ZINC 13830 TO218 PREGREASED MICA 56-78-2AP 4

YORKVILLE NAME: PCB#&VER:

MODELS: SCH ISSUE:

TITLE:

DATE:

M1085

SR-300

M1085AMP.SCH

APR/30/2003

AMPLIFIER_150W

1.80

MJE15030Q8L

2u263V

C3L

1n2C12L

MJ15031Q10L

MJL21193

Q9L

MJL21194Q11L

33R

R29L

1nC11L

100KR5L

100KR6L

SRT USE

GOLD120R

R19L

390RR43L

3R92W

R38LHEAT

SINK

HEAT

SINK

16V1N5246A

D8L

D30L

BC560Q6L

16V1N5246A

D9L

D16L

270KR50L

270RR14L

D15L

D2L

A

C

NCE

C

B

4N35

U2L

1

2

34

5

6

0R15

5WR31L

0R15

5WR33L

1/2

33078

U1L

6

57

20KR12L

D13L

D1L

MPSA56Q5L

D14L

68R

R36L

100pC9L

1N5402D11L

1N5402

D12L390R

R13L

D17L

56KR8AL

100nC4L

100nC5L

MPSA06Q4L

750RR15L BAT85

D3L

1

5uHL1L

1

220n

C8L

5

BC560Q1L

33pFC2L

1/2

33078

U1L

2

31

7K96

R3L

681R

R4L

4K12

R1L

252423222120191817161514131211

10987654321# DESCRIPTION OF CHANGEVER#DATEMODEL(S):-

APR/30/03SEP/30/02OCT/08/99.APR/27/99MAR/30/99DEC/08/95NOV/24/95.JUL/12/95 V

1.801.701.60.1.501.401.301.20. N

ADD_R8AL_FOR_BIAS_ADJUSTMENTCORRECTION_R27L/R28L->1/8W-FLM-PRFHEATSINK_SYMBOL_ADDEDR51L,Q15L,D30LPC#5890_RT1L_100K->10K_ADD_R50L,R11L_15K->12KPC#4971.

SR-300M1085PA.SCH_DATABASE_HISTORY

10R1W

R37L

3K16R25L

3K16R26L

33R2R21L

274RR20L

274RR23L

33R2R24L

10KRT1L

BC550Q7L

6K98R18L

D5L

D6L

BC550Q2L

330u25V

C6L

100u25V

C7L

2K22W

R30L

2K22W

R35L

D7L

D10L

BAT85

D4LMPSA56

Q3L

390RR10L

10KR8L

12KR11L

33u16VC1L

CW4K7

AR9L

10R

R46L

D26L

D27L

CSA4n7

2

CSA22n

T2.5

A

13A/85C

T10A

CSA4n7

C1

EY1

TB7

TB5

TB6

TB3

TB2

TB4

TB1

T10A

63V2u2

C6D72M2

R3

63V1uC5 10K

R2

22VZ5251B

ZD1

CSA22n

C2

5A-S

B

F1

13A/85CBR1

S1

10A-SBF3

10A-SB

F2

IN4004

D6

2K2

R1

50Hz370VA

#1248E

C4

63V4700u

37K9

R2L

PX6A02

D3PX6A02

D4

MJF6668MJF6388

ECB

MPSA06

E B C

MPSA56

3

D S G

2N5638BC550C

C B E

BC560C

10K

R42L

D25L

MJL21194MJL21193

ECB TP

B C E

MJE15031MJE15030

4

C3

63V4700u

3

PX6A02

D1

2

330u25V

C23L

IN4004

D5

60Hz370VA

#1248

T1

PX6A02

D2

33R

R44L

10R

R47L

33R

R45L

10N

C10L

33KR51L

BC550Q15L

10N

C13L

HEATSINK

HEATSINK

HEATSINK

HEATSINK

1/8W

150R-FP

R27L

1/8W

150R-FP

R28L

CLP2

GNDGND

GND

GND GND

GND

KIL

+16V_BAT

+16V_BAT

-16V_BAT

O/PO/P

-55V

-55V

-55V

+55V

+55V

+55V

+55V

AMP-IN

AGND

AGNDAGND

AGNDAGND

CIRCUIT WITHIN BOX IS NOTON POWER AMP BOARD

REMOVE R8AL AS REQUIRED TO ADJUST BIAS

ADDED BATTERY BYPASS CIRCUIT

PIN 8 U1

ADDED O/P JACKS CORRECTED I/P WIRES

1.10D27L, R43L. R19L FROM 510R TO 120R

PC#4850/4851 REMOVE R7L, C13L ADD D26L

1. ADJUST R9 ACCROSS TP1&TP2 FOR 4.5 mV BIAS

N.A. VERSION

EXPORT VERSION

230V A.C 50HZ LINE

BLUEGRN/YELBROWN

-21V -18V

ENCLOSE CIRCUITRY IS OFF-PCB.

ENCLOSE CIRCUITRY IS OFF-PCB.

CHAS

SIS

CHAS

SIS

120V A.C 60HZ LINEGREEN WHITEBLACK

GAIN = 6

5. ALL UNMARKED DIODES IN4148

will have a "R" suffix for4. Reference with a "L" suffix

3.

0.1%

0.1%

0.1%

0.1%

MX2L

MX1L

4V RMS

the right channel amplifier.

TEST POINT

HEAT SINK2. Q3 IS THERMALLY COUPLED TO

NOTES:

-0.58V

INPUT

150 WATTS @ 4R25.4VRMS

+0.60V

-0.58V

-0.85V

+.67

V

CONNECT TO M1085

AMP-REF.

CLP1

PREAMP PCB

4321

4

8

U:\M1085V18.PRN

VCD

M1085-9.00

M1085-9.00

SOLDERSIDE M1085-9.00M1085-9.00

BLANK SIZE=13.075" X 10.600"

USE 2 oz. COPPER

PCB MECH M1085-8.10

Q3BC

560

U2

TLO72

R8A680K

"P22

"ST

YLE

TB7RED_SEC2

XFMR

SW2LIMITER

#343

6

C62u263V

D741

48

C8 100n

LD1

PWR_

ON(G

RN)

BE

Q1+15V

MJF6

388

JB2BOUTP

UT"B

"

D6IN40

04

R5

1W10

0R

C12B

16V

10u

U3

LM13

600

P1A 25

A

10K

#439

0

CHAN

NEL"

A"

Q3B

2N56

38

JB1B

LINE

_IN

C4

#5869

4700u63V

BAR DOWN

D3

#6434

PX6A

02

Q5B

BC56

0

Q4BBC560

Q5A

BC56

0

Q2BBC560

Q1B

BC550

Q4A

BC56

0

Q2ABC560

Q1A

BC550

U1

TLO72

U6

TLO72

U7

TLO7

2U4

5532

U5

TLO7

2

R7B10K

R9A

1K

R32M

2R2

10K

R32B1K

R101K5

R9 470R

R38A1K

R7 15K

R6 15K

R12K2

R38B1K

R23B953R

R17B 10M

R20B91K

R35A1K5

J29

R8B 680K

R23A953R

C23R

330u25V

R33B27K

R27B10K

R17A 10M

R20A 91K

R21B

60K4

_1%

R22B

133K

1%

R34A

12K

R26B20K0

R28B180K

J20

R3B9K760

R2B

953R

R1B

953R

R4B9K760

R5B9K760R6B9K76

0

J28

R31A100KR21A

60K4

_1%

R22A 133K1%

R10A

100K

R16B

20K0

J7

R24B20K0R25B20K0

R30B 2K

R15B

22M

J19

R29A10K

R36B4K7

R14B

100R

R12B

27K

R19B

43K

R18B91K

R9B

1K

R8 470R

J18

J33

R32A1K

D5A4148

R24A

20K0

R16A

20K0

R30A

2K

R15A22M

J17

R12A

27K

R19A

43K

R18A 91KR1

1B22

0KR11A

220K

R39A3K

R11

470R

R10B

100K

R6A9K760

R5A9K760

J15

R2A

953R

R1A

953R

R3A9K760

ZD1

22V

R42L 10K

R42R 10K

J35

C2

5SE

E

TB5RED_SEC1

XFMR

TB6

YEL._C-TAP

XFMR

TB3

WHT_PRI

LINE-CORD

TB2

BLK_PRI

XFMR

TB4WHT_PRI

XFMR

TB1BLK_PRI

WIRE

SW1

HIGH-PASS-FILTER

#343

6

C51u63V

C10A

33u16V

C13B

100u

25V

C13A

100u

25V

C1122u

50V

C10B

33u

16V

C11B 33u

16V

D1B

4148

J21

D25R 4148

R28A180K

D3B4148

J34

R27A

10K

D3A

4148

D25L 4148

R36A4K7

C10

100n

C9100n

C21

100n

C18

100n

C19 100n

C16 100n

C17100n

C14

100n

J8

C13

100n

C12

100n

C7B220nC9B 220n

C7A220nC9A 220n

C5B10p

C1B

1n

C2B

1n

C20 100n

C6B47nC8B 82n

C7 100n

C5A

10p

C6A47nC8A 82n

C2A

1n

C1A

1n

LD4B CLIP

(RED

)LD

4A

CLIP

(RED

)

LD3B

LIM.

(YEL

)

LD2B

SIG.

(GRN

)

LD3A

LIM.

(YEL

)

LD2A

SIG.

(GRN

)

BE

Q2-15V

MJF6

668

F2T10A

10ASB#3414SEC1._FUSE

1#3574

D5

IN40

04

R4

1W10

0R

C3B

16V10u

C12A

16V

10u

C3A 16V

10u

Q3A 2N

5638

JB1A

LINE

_IN

C3

#5869

4700u63V

BAR DOWN

D4#6434

PX6A

02

BAR DOWN

D2

#6434

PX6A

02

BAR DOWN

D1

#6434

PX6A

02

JB2A

OUTP

UT"A

"

C23L

330u25V

#3593

VT R

GREE

N

1#3574

MX1.

CTRL-PCB.

#3603

J1

J3

J4

J5

J6

J2

F3T10A

10ASB#3414SEC2._FUSE

#3593

J13

250V

AC

680N

J14

J23

J24

J12

J25

J31

J30

J32

1.#3

655

1

#3655

R7A

10K

D4B

4148

MX1

CTRL-PCB. #3603

D4A4148

R29B10K

R13B

18K

D2B

4148

J16

1MX3A#3574

J27

D2A

4148

ZD216V

ZD3

16V

J11

D11L

IN5402

R26A

20K0

R25A

20K0

R14A

100R

D1A

4148

R13A

18K

R33A

27K

1MX2A#3683

1

MX2B#3683

J26

D5B

4148

RTV

VT R

D12L

IN5402

C11A

33u

16V

C22A470p

RTV

B E

Q10L

MJE15031

#6897

R39B3K

B E Q8LMJE15030

#6896 Q11L#6988

MJL21194

Q9L#6991

MJL21193

J2R

R36L68R

D11R

IN54

02

R15R 750R

R3L

7K96

R4L

681R

R1L4K12/0.1%

R26L

3K16

R51R

33K

R23L274R

R24L33R2

R29L33R

R19L

120R

R8AR56K

R11L12K

C7L

100u25V

C6L

330u25V

U2L

4N35

R31L

5W0R

15

R33L

5W0R

15U1L

MC33

078

R27L

150R

L1L

#3819

5uH

R30L

2W 2K2

R37B

10K

R35L

2W2K2

R38L

3R92W

R37L

10R

1W

R9L

BIAS

4K7

J5L

C11L1n

C9L

100p

D27L

4148C5L 100n

J3L

R40B 47K

D9L

16V

D8L

16V

D2L

4148

D1L

4148

D3LBA

T85

D7L 4148

D5L4148

D6L

4148

R20L

274R

Q6L

BC56

0 Q7L

BC55

0

Q1L

BC560

Q2LBC550

D15L4148

R45L33R

D4LBAT85

D13L4148

Q5L

A56

Q4LMPSA06

C8L

220n

C10L10n

R4A

9K760

R43L390R

R31B 100K

R8L 10K

R13L390R

R46L 10R

R5L 100K

D17L 4148

Q3LA56

R8AL 56K

D6B10V

R18R

6K98

R12L20

K0

R40A47K

J1L J4L

R10L

390R

R15L750R

R2L37

K90

TP3L

TP2LTP1L

C1L 33u

16V

C3L

2u263V

MX1L

PWR.

_SUP

.&O/

P(#3

538)

C22B

470P

J7R

D7R 4148

J6R

VT R

R37A10K

VT R

D6A10V

RTV

1MX3B#3574

R35B

1K5

C4L 100nC12L1N2

MX1R

PWR.

_SUP

.&O/

P(#3

538)

C3R

2u263V

C1R33

u16

V

TP1R

TP2R

TP3R

R2R

37K9

0

J1R

R10R

390R

J5R

RT1L10K

R12R

20K0

P1B

25A

10K

#439

0

CHAN

NEL"

B"

Q3R

A56

R5R 100K

R13R390R

R8R 10K

C4R 100n

R34B12K

C10R10n

C8R

220nQ4R

MPSA06

Q5R

A56

D17R

4148

D13R4148

D4RBAT85D14R

4148D1

6R41

48

D15R4148

Q2RBC550

Q1R

BC560

Q7R

BC55

0

Q6RBC

560

D10R 4148

D6R

4148

D5R4148

D3R

BAT8

5

D1R

4148D2

R41

48

D8R

16V

D9R

16V

J24R

C5R

100nD27R4148

4148C9

R10

0p

C11R1n

R29R33R

R9RBI

AS

4K7

R37R

10R

1W

R38R

3R92W

R35R

2W 2K2

R30R

2W2K2

L1R

#3819

5uH

D12R

IN54

02U1R

MC33

078

R33R

5W0R

15

R31R

5W0R

15

U2R 4N35 C6R

330u25V

C7R

100u25V

R28L

150R

R19R120R

R11R12K

R20R

274R

J20R

D30R

4148

U2AR

TLP6

2_

R26R

3K16

R1R

4K12/0.1%

R4R

681R

R3R

7K96

C1CSA4N7

R36R68R

R25R

3K16

Q9R

#6991

MJL21193 Q11R

#6988

MJL21194

BE

Q8R

MJE15030#6896

BE

Q10R

MJE15031

#6897

R43R390R

D26R4148

C2L33p

RTV

U2LA

TLP6

2_

C2R33p

VTR

VT R

#5989

#5989

VT R

VTR

C12R1N2

R51L

33K

2019181716151413121110987654321#DE

SCRI

PTIO

N OF

CHA

NGE

VER#

DATE

MODE

L(S)

:-

DJUN/

17/0

5AP

R/30

/03

JUL/

03/0

2MA

R/02

/00

MAR/

30/9

9.FE

B/24

/99

JAN/

26/9

9AU

G/14

/97

.MAR/

19/9

7AU

G/22

/96

.APR/

22/9

6.NO

V/20

/95

OCT/

23/9

5.JU

L/07

/95

V9.00

8.10

8.00

7.00

...6.00

5.00

.4.00

3.00

.3.00

.2.20

2.10

.

NREDO

SOL

DERM

ASK

ADD_

R8AL

/R_F

OR_B

IAS_

ADJU

STME

NTPC

#622

7_MO

VE_D

16L,

D17L

,D14

LPC

#621

1_FI

X_ER

ROR_

Q6R-

>Q15

RR1

1R/L

_15K

->12

K_PC

#598

2Q1

5L/R

,R50

L/R,

R51,

R/L_

D30L

/RPC

#589

0_10

0K_T

HERM

ISTO

R->1

0K_A

DDED

_PC

#590

8_AD

D_TL

P621

_(U2

RA_U

2LA)

SPAC

E_AD

DED_

FOR_

680N

_CAP

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->RA

DIA

C15_

RADI

AL->

AXIA

LOU

TPUT

_TER

MINA

LS_R

EPLA

CED_

MACP

IN_U

PDAT

EDPC

#510

3PC

#497

1PC

#495

2PC

#495

1PC

#491

9

SR-3

00M1085.PCB_DATABASE_HISTORY

C15

100n

R47L10R

D14L4148

D16L4148

R44L 33R

C13L10n

R6L

100K

R14L

270R

R47R10R

R46R10R

R45R 33R

R44R

33R

R14R

270R

R6R

100K

C13R10n

J2L

R18L

6K98

R50R

270K

Q15R

BC55

0

R21R

33R2

D30L

4148

1-1+

BLK

RED FU

NCTION

R50L

270K

Q15L

BC55

0

R21L

33R2

RT1R

10K

R25L

3K16

D10L4148

R23R274R

R24R33R2

R28R

150R

R27R

150R

CLP1"B"

O/P_RO/P_R

I/P"

A"

-45V

+45V

I/P"

B"

CLP1

R

O/P"A"

O/P"B"

CLP1

"A"

AGND

AGND

V-

V-

SGND

SGND

V+

V+

CLP2

LCL

P1L

I/P"

R"

O/PLO/PL

I/P"

L"

CLP2

R

GND

GND

GND

REMO

VE R

8AL/

R AS

REQ

UIRE

D TO

ADJ

UST

BI

NOTE 8

ASSE

MBLY

M

1085

-9.0

0

(TLP

621)

NOT

BOT

HST

UFF

4N35

U2R

, U2

L OR

U2R

A, U

2LA

NOTE 7

NOTE

NOTE

SEE

SEE

POT

P22

SCRE

W88

70

WASH

ER35

11

PCB

USE

PART

#526

6 68

0N F

OR E

MC U

NITS

NOTE 6

SPAC

ERSP

ACER

#860

7#8

607

EC

BE

CB

Q8L/

RQ1

0L/R

Q9L/

RQ1

1L/R

BLAN

K SI

ZE=1

3.07

5" X

10.

600"

MOVE

THE

RMIS

TOR

ADD

BATT

ERY

BYPA

SS C

IRCU

IT

USE

PART

#643

5 22

N FO

R N.

A. U

NITS

D14L

, D1

6L D

17L

Q1L

AND

Q2L

MOVE

D FO

R RA

DIAL

INS

ERTI

ON

5NO

TESE

E

FOR

C2

NOTE 5

RETA

PE T

O AC

CEPT

470

N AC

CAP

PT#

5243

FOR

EMC

UNI

TS

RIBB

ON M

ARK

RIBB

ON M

ARK

R19L

/R 5

10R-

->12

0RPC

#485

0/48

51 D

ELET

E R7

L/R,

C13L

/R.

ADD

D26L

/R,

D27L

/R,

R43L

/R.

2.00

TUBI

NG T

O R2

2L/R

ALLO

WED

NO S

UBST

ITUT

ION

#678

0 FO

R Q3

L/R

USE

ONLY

PAR

T NOTE 3A

NOTE 4

NEW

SPAC

ER#3

747

LED

NOTE 3

SOLD

ERIN

GBE

FORE

WAV

E

ADD

HEAT

SHRI

NK

NOTE 2

ENGINEERING NOTES

NOTE 1

TO MX3BRIBBON CABLE

TO MXRARIBBON CABLE

R22L

/R

THE

ABOV

EEX

TEND

MUST

NOT

TUBI

NGHE

ATSH

RINK

THER

MIST

OR

SHEAR HERE AFTER BOARD TEST

DETA

ILMO

UNTI

NGTR

ANSI

STOR

SPAC

ER#8

607

Q3L/

R CB

E

O/P

O/P

O/P

O/P V-GNDV+

V-GND

V+#3528

#3528

#3498

#3498

VER:9.00

M1085-9.00

M1085-9.00

SR-300M1085

RIGHT CHANNEL

LEFT CHANNEL

2-OZ COPPER

2-OZ COPPER

2-OZ COPPER1

1

CLP2"B"

CLP2"A"

PCB

MECH

M

1085

-9.0

0

P:\1085V81.PRN

BC560Q3

1/2

TLO72

U2

2

31

680K

R8A

10K

R7A

1K

R9A

OUT

IN

SW2 4 5 6

YORKVILLE NAME: PCB#&VER:

MODELS: SCH ISSUE:

TITLE:

DATE: DWG_1_OF_2

M1085

SR-300

M1085.SCH

OCT/08/99

INPUT/PREAMP

1.40

100n

C8

1K

R38B

1K5

R10

GREEN

LD1

470RR9

16V

33UC10B

OUT

IN

SW2 1 2 3

1K

R38A

100n

C10

15KR7

100n

C9

16V500mWZD3

16V500mWZD2

MJF6

388

Q115KR6

MJF6

668Q2

1/2

TLO72

U2

6

57

16V

33UC10A

YEL

LD3B

2KR30B

100n

C21

100n

C18

100n

C19

100n

C16

100n

C17

100n

C14

100n

C15

100n

C13

100n

C12

D1B

D1A

1K5R35B

953R

R23B

3K

R39B10MR17B OUT

IN

H.P.F

SW14

5

6

91K

R20B

1K5R35A

100K

R31A

680K

R8B

953R

R23A

BC550Q1A

100R1W

R5

100R1W

R4

100K

R31B

220nC7B

220nC9B

12KR34B

27KR33B

10K

R27B

10MR17A OUT

IN

H.P.F

SW11

2

3

91K

R20A220nC7A

220nC9A

60K4_1%R21B

133K1%

R22B

CLP

RED

LD4B

12KR34A

27KR33A

20K0

R26B

180K

R28B

25V100u

C13B

10u16VC12B

PIN 11

D

IABC

1/2LM13600

U3

13

15

14

16

129 10

BC560

Q5B

10pC5B

10K

R27A

9K760

R3B

1n

C1B

1/2

TLO72

U1

6

57

953R

R1B

953R

R2B

9K760

R4B

1n

C2B

9K760

R5B

9K760

R6BCW

25A

10KP1B

10u 16VC3B

18K

R13B

10K

R29B

2N5638Q3B

S R TBAL.

INPUT

JB1B 1

2

3

4

5

6

100K

R10B

60K4_1%R21A

133K1%

R22A

20K0

R16B

D2B

1N5240BRL10V

D6B

1K

R32B

CLP

RED

LD4A

20K0

R24B

D4B

D3B20K0

R25B

10KR7B

BC550Q1B

2KR30A

20K0

R26A

180K

R28A

25V100u

C13A

10u16VC12A

10K

R37B

100RR14B100n

C20

27KR12B

43KR19B

91K

R18B

47nC6B

82n

C8B

1K

R9B

100n

C7

GRN

LD2B

50V22u

C11

1/2

TLO72

U6

6

57

1/2

TLO72

U5

6

57

4K7R36B

470RR8

470pC22B

PIN 11

D

IABC

1/2LM13600

U3

4

2

3

1

58 7

1/2

5532

U4

6

57

D5B

BC560

Q5A

1/2

TLO72

U7

6

57

10pC5A

18K

R13A

10K

R29A

47KR40B

47KR40A

2N5638Q3A

22MR15B

20K0

R16A

D2A

1K

R32A

20K0

R24A

D4A

D3A20KO

R25A

HEATSINK

HEATSINK

"P22"STYLE

BC560Q2B

10K

R37A

YEL

LD3A

100RR14A

22MR15A

27KR12A

43KR19A

91K

R18A

47nC6A

82n

C8A

1/2

TLO72

U6

2

31

1/2

TLO72

U5

2

31

220K

R11B

220K

R11A

4K7R36A

470RR11

1/2

5532

U4

2

31

100K

R10A

D5A

S R TBAL.

INPUT

JB1A 1

2

3

4

5

6

10u 16VC3A

CW

25A

10KP1A

9K760

R6A

9K760

R5A

1n

C2A

9K760

R4A

953R

R2A

953R

R1A

GRN

LD2A

1/2

TLO72

U1

2

311n

C1A9K760

R3A

1/2

TLO72

U7

2

31

BC560Q2A

33u16VC11A

33u16VC11B

BC560Q4A

3K

R39

BC560Q4B

252423222120191817161514131211

10987654321# DESCRIPTION OF CHANGEVER#DATEMODEL(S):-

DDDDDDDOCT/08/99MAR/31/99NOV/24/95 V

VVVVVVV1.401.301.20 N

NNNNNNNHEATSINK_SYMBOL_ADDEDUPDATE_POTS.

SR-300M1085.SCH_DATABASE_HISTORY

1N5240BRL10V

D6A

470pC22A

D G S

2N5638BC550C

C B E

BC560C

MJF6388MJF6668

ECB

+55V

KIL

KIL

KIL

GNDGND

GND

GND

GND

GNDGND

GND

GND

GND

GND

GND

GND GND GND

GND

GND

GND

GND

GND

GND

GND

GND GND

GND

GND GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GNDGND

GND

GND

GND

GND

GND

GND

-15V

-15V -15V

-15V

-15V

-15V

-15V

-15V

I/P"A"

CLP1"A"

-55V

+15V

+15V

+15V

+15V

+15V

+15V

+15V

+15V

+15V

I/P"B"

REDREW OUTPUTS TO MATCH PWR AMP SCHEM.

(TO AMP "B")

(TO AMP "A")

-13V

-13V

4.5V

4.5V

OF AMPLIFIER

OF AMPLIFIER

TO INPUT

TO INPUT

POWEROUTPUT

FOR FULL1.4VRMS

CLP2"A"

4

4

3

3

2

2

1

1

CLP2"B"

POWER ON

CLP1"B"SIGNAL

SIGNAL

LIMITER

(TO AMP "A"&"B")

ALL UNMARKED DIODES ARE IN4148

STEREO/

GOLD TIP&RING JACK

GOLD TIP&RING JACK

"B"

"A"CHANNEL

CHANNEL

MONO

LIMITER

WILL WORK IN MONOIS CONNECTED UNITIF EITHER INPUT JACKNOTE:

PIN 1

PIN 1

A RIBBON CABLETO THE REAR PCB WITHPCB WHICH IS CONNECTEDLOCATED ON THE FRONTTHE DOTTED LINE ARECOMPONENTS INSIDE

LIMITER LIMITER

U:\SR300IP2.PRN

TT

NL

B L A C K D B L /I N S

1 4 " B L A C K D B L /I N S

1 7 " W H I T E D B L /I N S

W H I T E D B L /I N S

W H I T E D B L /I N S

G R N /Y E L L

S R - 3 0 0 E A C W I R I N GV E R S I O N 1 . 3 0F E B 0 2 , 9 9

19 1/2" WHIT E

4 1/

2" B

LAC

K

1 2 4 8 E

R E D DBL/INS