AP4020

WORLD HEADQUARTERS

CANADA

Yorkville Sound

550 Granite Court

Pickering, Ontario

L1W-3Y8 CANADA

Voice: (905) 837-8481

Fax: (905) 837-8746

WEB: www.yorkville.com

U.S.A.

Yorkville Sound Inc.

4625 Witmer Industrial Estate

Niagara Falls, New York

14305 USA

Voice: (716) 297-2920

Fax: (716) 297-3689

Quality and Innovation Since 1963

Printed in Canada

MODEL TYPE: YS 4020

SERVICE MANUAL

Manual-Service-ap4020-00-4v4

IMPORTANT SAFETY INSTRUCTIONS

This lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

Ce symbole d’éclair avec tête de flèche dans un triangle

équilatéral est prévu pour alerter l’utilisateur de la présence d’un

« voltage dangereux » non-isolé à proximité de l’enceinte du produit qui pourrait être d’ampleur suffisante pour présenter un risque de choque électrique.

The exclamation point within an equilatereal triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

Le point d’exclamation à l’intérieur d’un triangle équilatéral est prévu pour alerter l’utilisateur de la présence d’instructions importantes dans la littérature accompagnant l’appareil en ce qui concerne l’opération et la maintenance de cet appareil.

S2125A

FOLLOW ALL INSTRUCTIONS

Instructions pertaining to a risk of fire, electric shock, or injury to a person

CAUTION: TO REDUCE THE RISK OF ELECTRIC

SHOCK, DO NOT REMOVE COVER (OR BACK).

NO USER SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL.

SUIVEZ TOUTES LES INSTRUCTIONS

Instructions relatives au risque de feu, choc électrique, ou blessures aux personnes

AVIS: AFIN DE REDUIRE LES RISQUE DE CHOC

ELECTRIQUE, N’ENLEVEZ PAS LE COUVERT (OU LE

PANNEAU ARRIERE) NE CONTIENT AUCUNE PIECE

REPARABLE PAR L’UTILISATEUR.

CONSULTEZ UN TECHNICIEN QUALIFIE

POUR L’ENTRETIENT

Read Instructions: The Owner’s Manual should be read and understood before operation of your unit. Please, save these instructions for future reference and heed all warnings.

Clean only with dry cloth.

Packaging: Keep the box and packaging materials, in case the unit needs to be returned for service.

Warning: To reduce the risk or fire or electric shock, do not expose this apparatus to rain or moisture. Do not use this apparatus near water!

Warning: When using electric products, basic precautions should always be followed, including the following:

Power Sources

Your 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. An apparatus with CLASS I construction shall be connected to a Mains socket outlet with a protective earthing ground. Where the MAINS plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.

Hazards

Do 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. Only use attachments/accessories specified by the manufacturer

Note: Prolonged use of headphones at a high volume may cause health damage on your ears.

Veuillez Lire le Manuel: Il contient des informations qui devraient êtres comprises avant l’opération de votre appareil. Conservez. Gardez S.V.P. ces instructions pour consultations ultérieures et observez tous les avertissements.

Nettoyez seulement avec le tissu sec.

Emballage: Conservez la boite au cas ou l’appareil devait être retourner pour réparation.

Avertissement: Pour réduire le risque de feu ou la décharge électrique, n'exposez pas cet appareil à la pluie ou à l'humidité. N’utilisez pas cet appareil près de l’eau!

Attention: Lors de l’utilisation de produits électrique, assurez-vous d’adhérer à des précautions de bases incluant celle qui suivent:

Alimentation

L’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. Un appareil construit selon les normes de CLASS I devrait être raccordé à une prise murale d’alimentation avec connexion intacte de mise

à la masse. Lorsqu’une prise de branchement ou un coupleur d'appareils est utilisée comme dispositif de débranchement, ce dispositif de débranchement devra demeurer pleinement fonctionnel avec raccordement à la masse.

Risque

Ne 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. Utilisez seulement les attachements/accessoires indiqués par le fabricant

Note: L'utilisation prolongée des écouteurs à un volume élevé peut avoir des conséquences néfastes sur la santé sur vos oreilles. .

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. Ne procédez pas à l’installation près de source de chaleur tels que radiateurs, registre de chaleur, fours ou autres appareils (incluant les amplificateurs) qui produisent de la chaleur.

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. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus

(including amplifiers) that produce heat.

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

Power Cord

Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. The AC supply cord should be routed so that it is unlikely that it will be damaged. Protect the power cord from being walked on or pinched particularly at plugs. If the AC supply cord is damaged DO NOT OPERATE THE UNIT. To completely disconnect this apparatus from the AC Mains, disconnect the power supply cord plug from the AC receptacle. The mains plug of the power supply cord shall remain readily operable.

Unplug this apparatus during lightning storms or when unused for long periods of time.

Service

The unit should be serviced only by qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

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’Alimentation

Ne pas enlever le dispositif de sécurité sur la prise polarisée ou la prise avec tige de mise à la masse du cordon d’alimentation. Une prise polarisée dispose de deux lames dont une plus large que l’autre. Une prise avec tige de mise à la masse dispose de deux lames en plus d’une troisième tige qui connecte à la masse. La lame plus large ou la tige de mise à la masse est prévu pour votre sécurité. La prise murale est désuète si elle n’est pas conçue pour accepter ce type de prise avec dispositif de sécurité. Dans ce cas, contactez un électricien pour faire remplacer la prise murale. Évitez d’endommager le cordon d’alimentation. Protégez le cordon d’alimentation. Assurezvous qu’on ne marche pas dessus et qu’on ne le pince pas en particulier aux prises.

N’UTILISEZ PAS L’APPAREIL si le cordon d’alimentation est endommagé. Pour débrancher complètement cet appareil de l’alimentation CA principale, déconnectez le cordon d’alimentation de la prise d’alimentation murale. Le cordon d’alimentation du bloc d’alimentation de l’appareil doit demeurer pleinement fonctionnel.

Débranchez cet appareil durant les orages ou si inutilisé pendant de longues périodes.

Service

Consultez un technicien qualifié pour l’entretien de votre appareil. L'entretien est nécessaire quand l'appareil a été endommagé de quelque façon que se soit. Par exemple si le cordon d’alimentation ou la prise du cordon sont endommagés, si il y a eu du liquide qui a été renversé à l’intérieur ou des objets sont tombés dans l'appareil, si l'appareil a été exposé à la pluie ou à l'humidité, si il ne fonctionne pas normalement, ou a été échappé.

safety-4v7 • May 7/2008

Description

AS35FN-TO92 TEMPERATURE SENSOR

RED 3MM LED 1V9 20MA.4SPCER T&R

GRN 3MM LED 1V9 20MA.4SPCER T&R

BRIDGE 35A 400V WIRE LEAD GI3504

BAV21 200V 0A25 DIODE T&R

1N4148 75V 0A45 DIODE T&R

1N4007 1000V 1A0 DIODE T&R

MR854 400V 3A0 DIODE FASREC

1N5248B 18V0 0W5 ZENER 5% T&R

1N5257B 33V0 0W5 ZENER 5% T&R

1N5225B 3V0 0W5 ZENER 5% T&R

1N750ARL 4V7 0W5 ZENER 5% T&R

1N5242B 12V0 0W5 ZENER 5% T&R

1N5251BRL 22V0 0W5 ZENER 5% T&R

1N5250B 20V0 0W5 ZENER 5% T&R

1N5244B 14V0 0W5 ZENER 5% T&R

1N5246B 16V0 0W5 ZENER 5% T&R

1N4747A 20V0 1W0 ZENER 5% T&R

1N4745A 16V0 1W0 ZENER 5% T&R

BC550C TO92 NPN TRAN T&R TB

BC560C TO92 PNP TRAN T&R TB

MPSA06 TO92 NPN TRAN T&R TA

2N5551 TO92 NPN TRAN T&R TA

2N5401 TO92 PNP TRAN T&R TA

2N6517 TO92 NPN TRAN TA

MPSA13 TO92 NPN DARL T&R TA

MPSA63 TO92 PNP DARL T&R TA

MJF6668 T221D PNP TRAN DARL TJ

MJF6388 T221D NPN TRAN DARL TJ

MJE340 TO126 NPN TRAN TG

MJE350 TO126 PNP TRAN TG

MTP10N15L TO220 NCH MFET TN

MTP23P06 TO220 PCH MFET TN

MJ21196 TO3 NPN TRAN TH

2SA2121-0 TO3P PNP TRAN TK

2SC5949-0 TO3 NPN TRANSISTOR TK

MJ21195 TO3 PNP TRAN TH

MC33078P IC DUAL OP AMP

LM13600N IC XCONDUCTANCE AMP

MBS4992 TO92 8V5 DIAC T&R

BTB24-600 TO220AB 25A TRIAC 600V

4N35 OPTO-COUPLER

__5R 20% THERM-SURGR NTC KNK LEADS

_10P 500V 5%CAP T&R RAD CER.2NPO

_47P 100V 2%CAP T&R RAD CER.2NPO

100P 100V 10%CAP T&R BEAD NPO

220P 100V 2%CAP T&R RAD CER.2NPO

220P 100V 10%CAP T&R BEAD NPO

470P 100V 5%CAP T&R RAD CER.2NPO

__1N 400V 5%CAP T&R RAD .2FLM

__1N5 200V 5%CAP T&R RAD CER.2NPO

__2N2 400V 5%CAP T&R RAD .2FLM

__2N2 50V 10%CAP T&R BEAD Y5R

__4N7 250V 5%CAP T&R RAD .2FLM

__4N7 250V 20%CAP BLK 'Y' 10MM AC

__6N8 100V 5%CAP T&R RAD .2FLM

_10N 400V 10%CAP BLK RAD POLY FLM

_22N 100V 10%CAP T&R RAD .2FLM

_22N 275V 20%CAP BLK 'X2' 15MM AC

_68N 100V 5%CAP T&R RAD .2FLM

100N 63V 5%CAP T&R RAD .2FLM

100N 100V 5%CAP T&R RAD .2FLM

100N 50V 10%CAP T&R BEAD X7R

150N 63V 10%CAP T&R RAD .2FLM

220N 63V 5%CAP T&R RAD .2FLM

220N 250VDC 10%CAP BLK RAD PLY FLM

470N 63V 10%CAP T&R RAD .2FLM

__1U 63V 20%CAP T&R RAD .2EL

__4U7 63V 20%CAP T&R 8X7MM .2EL

__4U7 100V 20%CAP T&R RAD LESR2

_10U 16V 20%CAP T&R 5X7MM .2NP

_10U 160V 20%CAP BLK 10X13MM EL

_10U 63V 20%CAP T&R RAD .2EL

_22U 50V 20%CAP T&R RAD .2EL

_33U 16V 20%CAP T&R RAD .2IN NP

100U 25V 20%CAP T&R RAD .2EL

330U 25V 20%CAP BLK 10X13MM EL

470U 63V 20%CAP BLK 12X25MM EL

6800U 63V 20%CAP BLK 25X50MM

_10K AUD 16MM DETENT P22

YS #

5226

5212

5228

5314

5229

5231

5882

5234

5255

5273

5208

5426

5209

6451

5272

5834

5210

6435

6489

5401

5203

5410

5197

5412

5201

5206

7005

6910

6840

6745

5190

6517

6880

5258

5269

5282

5629

5945

5260

5961

5267

5630

5621

5895

4390

5106

6814

6815

6873

6874

6752

6933

6909

7004

6822

5101

5102

5103

5107

5108

6854

5105

6433

6439

6440

6450

6463

6465

6486

6824

6429

6478

5906

5908

6419

6425

6825

6438

6934

6432

Qty.

4

4

4

2

3

3

2

4

4

2

2

11

2

2

2

2

6

1

1

13

2

4

2

2

2

4

2

2

4

2

16

5

2

8

3

2

8

2

4

2

6

6

5

16

2

2

2

16

2

2

6

1

1

6

2

1

2

4

4

14

14

3

2

2

1

2

1

5

2

3

6

51

11

20

2

3

2

2

3

4

AP4020 Parts List 11/9/2012

YS # Description

2016

2041

4899

4811

2044

4984

2045

2021

2023

4857

4977

2024

8434

3894

3501

3803

3810

3827

3852

8433

8661

2329

3035

3036

3037

3451

9198

7584

8432

3410

3415

3918

3628

3922

4069

4070

4056

2328

4520

2448

3820

3485

3486

3489

3490

3601

3618

_10K TRIM POT

15.00 AMP CIRCUIT BREAKER

___4UH COIL 14AWG ZOBEL HORIZONTAL

CLIP 250X032 18-22AWG RIGHT ANGL

CLIP 250X032 22-18AWG DISCO-LOK

CLIP 250X032 18-22AWG DISCO/INSL

CLIP 250X032 14-16AWG DISCO/INSL

RING TERMINAL 16AWG WIRE & #8 SCREW

STAR RING TERMINAL14-16AWG #10SCREW

RED:LEFT/BLACK:RIGHT BIND POST TPP5

RED:RIGHT/BLACK:LEFT BIND POST TPP5

1/4" JCK PCB MT HORZ SLIM W/SCREW

SPKON 4C PCB MT VERT 250TAB GRY #4

XLR FEML PCB MT HORZ THIN SNAP-IN

JST XH CONNECTOR: CONTACT

JST XH CONNECTOR: 2 CIRCUIT HOUSING

2 CIR XH-HEADER 0.098IN

8 CIR XH-HEADER 0.098IN

12 CIR XH-HEADER 0.098IN

PATCH 08 22AWG 05.0 XH FLAT

PATCH 08 22AWG 09.0 XH FLAT

PATCH 12 22AWG 15.0 XH FLAT

EYELET SMALL 0.089 OD PLATED

FAN 80MM X 80MM 40CFM 12VDC

SQUARE-CUT O RING FOR AP AIR FILTER

AP SERIES AIR GRILL BLACK PLASTIC

AP SERIES PLASTIC HANDLE PAIR

HEATSINK TO-220 W/TAB BLACK ANODIZE

B52200F006 COMP WASH #4 SMALL

NYLON SECUR-A-TACH MINI PLASTIC TIE

4" NYLON CABLE TIE

SQUARE BUMPER BUTTON BLACK

STICK ON CABLE WRAP ANCHOR

KNOB AP SERIES PLASTIC

KNOB BUTTON FLAT GREY

4911

4748

4733

2009

2037

4605

4875

4930

2039

4597

4599

5299

4745

4749

2005

2006

4677

4688

3468

3821

8261

8701

8793

8760

8800

8' 3/16 SJT AC LINE CORD STRIP 17"

STRAIN RELIEF HEYCO #1200

GE VELVET/MATTE LEXAN .007"X12"X24"

4-40 KEPS NUT ZINC

4-40 HEX NUT ZINC

6-32 KEPS NUT TIN PLATED

6-32 KEPS NUT ZINC

8854

8720

8797

3797

6-32 X 1/4" 0.D. HEX NUT ZINC CLEAR

#8 SPRING NUT

5/16-18 KEPS NUT JS500

TO-247 THERMO CONDUCTIVE PAD

3846

3916

TO220 THERMO PAD LARGE HOLE 56359B

TO3 SIL-PAD REPLACES MICA

4124 SILPAD 1500ST 1.100 X0.820 BERQUIST

8432P LOGO HOT STAMPED ON PLASTIC GRILL

22AWG STRAN TC WIR JMP

22AWG SOLID SC WIR T&R JMP

24AWG SOLID SC WIR RAD JMP

5.0W 0R1 5% BLK RES

5.0W 0R15 5% BLK RES

1.0W 0R47 5%FLAME PROOF T&R RES

1.0W 1R 5%FLAME PROOF T&R RES

1/2W 1R 5% T&R RES

1/2W 2R2 5% T&R RES

1/4W 2R2 5% T&R RES

2.0W 3R9 5% T&R

5.0W 5R6 5% BLK RES

1/4W 10R 2%FLAME PROOF T&R RES

1/4W 10R FUSIBLE T&R RES

1/8W 10R 5% T&R RES

1/4W 10R 5% T&R RES

1/4W 10R 5% .2"U T&R RES

1/4W 22R0 FUSIBLE T&R RES

1/6W 39R 2%FLAME PROOF T&R RES

1/4W 39R0 FUSIBLE T&R RES

1/4W 39R 5% T&R RES

1/4W 68R 5% T&R RES

1/4W 100R0 FUSIBLE T&R RES

1/4W 150R 5%MINI T&R RES

1/4W 150R FUSIBLE T&R RES

1/4W 200R0 1%FLAME PROOF T&R RES

1/6W 220R0 1%FLAME PROOF T&R RES

1/4W 220R 5% T&R RES

1/4W 220R 5%MINI T&R RES

1/6W 249R 2%FLAME PROOF T&R RES

Qty.

2

1

6

1

2

2

2

8

2

4

3

2

4

23

71

24

12

4

4

32

4

1

1

4

4

2

1

1

0.348

20

3

64

4

4

6

4

4

2

14

6

2

4

2

7

12

11

1

2

3

1

8

23

1

10

14

1

1

1

1

1

2

1

1

1

2

2

4

2

2

1

1

2

4

3

4

2

4

2

1

14

Description

1/4W 270R 5% T&R RES

1/4W 270R 5%MINI T&R RES

1/4W 330R 5% T&R RES

1/4W 470R 5% T&R RES

1/4W 470R 5%MINI T&R RES

1/4W 620R 5% T&R RES

1/4W 620R 5%MINI T&R RES

1/4W 1K 5%MINI T&R RES

1/4W 1K2 5% T&R RES

5.0W 1K5 5% BLK RES

1/4W 1K5 5%MINI T&R RES

1/4W 1K54 1% T&T RES

1.0W 1K8 5% T&R RES

1/4W 2K 5% T&R RES

1/4W 2K 5%MINI T&R RES

1/4W 2K2 5% T&R RES

1/4W 3K 5%MINI T&R RES

1/4W 3K3 5% T&R RES

1/4W 3K3 5%MINI T&R RES

1/4W 4K7 5%MINI T&R RES

1/4W 7K5 5% T&R RES

1/2W 8K2 5% T&R RES

1/4W 8K2 5%MINI T&R RES

1/4W 9K760 0.1% *** T&R RES

1/2W 10K 5% T&R RES

1/4W 10K0 1% T&R RES

1/4W 10K 5% T&R RES

1/4W 10K 5%MINI T&R RES

1/4W 10K0 1%MINI MF T&R RES

1/4W 12K 5% T&R RES

1/4W 13K 5% T&R RES

1/4W 14K7 1% T&R RES

1/4W 15K 5% T&R RES

1/4W 17K8 1% T&R RES

1/4W 18K 5%MINI T&R RES

1/4W 22K 5% T&R RES

1/4W 22K 5%MINI T&R RES

1/4W 27K 5% T&R RES

1/4W 33K 5% T&R RES

1/4W 39K 5% T&R RES

1/4W 43K 5% T&R RES

1/4W 47K 5%MINI T&R RES

1/4W 56K 5% T&R RES

1/4W 62K 5%MINI T&R RES

1/4W 68K 5% T&R RES

1/4W 78K7 1% T&R RES

1/4W 82K 5%MINI T&R RES

1/4W 100K 5% T&R RES

1/4W 100K 5%MINI T&R RES

1/4W 120K 5% T&R RES

2.0W 150K 5%10MM BODY T&R RES

1/4W 180K 5% .2"U T&R RES

1/4W 200K 5% T&R RES

1/4W 220K 5%MINI T&R RES

1/4W 470K 5%MINI T&R RES

1/4W 1M 5% T&R RES

1/4W 1M 5% .2"U T&R RES

1/4W 4M7 5% .2"U T&R RES

1/4W 8M2 5%MINI T&R RES

1/4W 22M 5% T&R RES

21" 14C-28AWG DIP HDR CABLE .05"

RELAY 2C 01AMP DC24 015MA PC-S

RELAY 1A 16AMP DC24 022MA PC-C

#4 X 1/4 PAN PH TYPE A ZINC

#4 X 3/8 FLAT QUAD TYPE A JS500 BLK

#4 X 1/2 PAN PHIL TYPE A B.O.& WAX

#6 X 1/4 PAN PH TYPE B JS500

4-40 X 5/16 PAN PH MS JS500

4-40 X 3/8 PAN PH TAPTITE JS500

4-40 X 3/8 PAN PH MS JS500

4-40 X 1/2 PAN PH MS JS500

4-40 X 5/8 PAN PH MS JS500

4-40 X 3/4 PAN PHIL MS B/O & WAX

6-32 X 1/4 PAN PH TAPTITE JS500

6-32 X 3/8 PAN PH TAPTITE JS500

6-32 X 3/8 FLAT PH TAPTITE BO#C HEA

6-32 X 1/2 PAN PHIL MS ZINC CLEAR

6-32 X 5/8 PAN PH TAPTITE ZINC

6-32 X 7/8 PAN PH MS JS500

8-32 X 5/8 PAN PH TAPTITE JS500

YS #

4751

3604

3700

3721

8870

8729

9975

8799

8865

4790

4949

4886

6126

6127

4844

4948

4951

6132

4835

6139

4836

5007

4586

4838

6120

4851

4832

6118

4833

4840

4853

4878

6119

8742

8861

8741

8871

8902

8832

8801

8829

8761

8796

8830

8999

4829

4983

6116

4856

4901

5008

4830

4771

6125

6136

4982

4887

4663

4990

4762

4629

4800

4718

4988

4791

4683

4808

6113

4847

6124

4826

4867

4986

4855

4821

4980

4891

5019

4981

4854

Qty.

4

2

2

4

2

1

1

4

1

2

2

1

1

1

6

2

4

2

2

2

2

2

4

2

4

2

4

2

7

1

3

4

1

4

3

4

24

2

8

3

12

64

2

2

17

2

12

2

2

2

4

15

4

4

8

4

2

8

2

18

5

2

2

6

4

2

2

4

2

4

6

2

2

16

1

2

2

2

2

9

YS # Description

3751

3743

3851

3417

8657

8629

3859

3502

8667

8719

8815

8809

8749

8740

8869

8731

3570

8663

8-32 X 3/4 FILLISTER PHIL MS JS500

8-32 X 3/4 PAN PH TAPTITE JS500

10-32 X 1/4 PAN PH TAPTITE JS500

10-32 X 1/2 QDX PH TAPTITE JS500

5/16-18 X 3 GRD 5 HEX BOLT JS500

8-18 X 1/2 THRD CUTTING FOR PLASTIC

10-16 X 5/8 TYPE B HEX W/SLOT JS500

14 PIN SCKT CLOSED FRAME DIP ONLY

11/64 NYLON SPACER (MICRO PLASTIC)

SNAP IN 5/16 SPACER RICHCO

SNAP ON 0.5" SPACER RICHCO

1/2 PCB PLASTIC SPACER

6-32 SCREW TERMINAL PC MNT SNAP-IN

6-32 X 3/8" HEX SPACER ALUMINUM

10-32 X 1/4 SPACER PHENOLIC

1/2 PLASTIC HEX SPACER #4

NYLON FLAT WASHER OD.158ID.110H.070

SHOULDER WASHER SWS-229 LENGTH 1/8

3511

8485

8818

3517

8850

8921

3705

3436

#6 FLAT WASHER NYLON

#6 SPLIT WASHER ZINC

3/4 OD X 3/8 ID X .080 THICK WASHER

NYLON WASHER #8 0.062

#10 INT TOOTH LOCKWASHER BO

#3MM ID3.2MM OD7.0MM THICK 5MM

4P3T SLID SW PCMT H

DPDT PUSH SW PCMT H BREAK B4 MAKE

3587

3392

DPDT ROKR SW QUIK 250"AC/PWR ON-OFF

250 MALE TAB .2IN T&R

3682 250 MALE PCB TAB REEL

CH1196 XFMR:AP4020 / V42

Qty.

1

3

4

4

2

4

2

4

1

14

22

1

2

2

2

8

4

3

10

4

1

4

12

1

66

2

5

4

14

1

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

2

3

1

A

4

5

CLIP

9

8

6

7

W1:A

W1:B

W1:C

W1:D

W1:E

W1:F

W1:G

W1:H

8

1

8

2

8

3

8

4

8

5

8

6

8

7

8

8

GNDA

10

11

12

+100V

+55V

R40A

1/4W

220R

+55V

R205

1/4W

47K

C20A

2N2 400V

R56A

1/4W

17K8

.

R43A

1/4W

3K

4148

D17A

2N5551

Q12A

BC560C

Q14A

Q15A

MJE350

D22A

4148

D23A

4148

2N5401

Q13A

MJE340

Q16A

4148

D18A

-55V

Q17A

BC550C

BC560C

Q21A

Q3

BC560C

MJE340

Q18A

Q1

BC550C R9

1/8W

249R

FLMP

10K

M

RT1

MJE350

Q19A

Q2

BC560C

R19

1/8W

249R

FLMP

-100V

BC550C

Q4

GND

Q31

AS35FN

OUT

VCC

13

3392

RED

+100V

W6

+100V

+100V

14

15

16

17

A B C

3392

YEL

+55V

W7

+55V

3392

BLK

GND

W8

GNDA

3392

WHT

-55V

W9

-55V

3392

BLU

-100V

W10

-100V

D E

+55V

-55V

F

-100V

G

BLK

EY1

BLK

EY6

RED

EY2

RED

EY5 J1:A

Function

SPEAKON 4C

3628

1+

2_

1_

2+

3628

SPEAKON 4C

BLK

EY3

Function

J1:B

BLK

EY8

YEL YEL

EY7 EY4

J2:A

Function

SPEAKON 4C

3628

1+

2_

1_

2+

3628

SPEAKON 4C

Function

J2:B

H I

400V

C33

1N

J

R87

1/4W

470R

R82

1/4W

200R0

FLMP

MJE340

Q40

2SC5949-0

Q5

4148

D1

D2

4148

0W5 4V

R84

1/4W

200R0

FLMP

D3

4148

D4

4148

MJE350

Q41

Q6

2SA2121-0

K L

4

6

U1:B

5

4

4N35

1

U1:A

2

R80

1/4W

220R

ZD10

3V0 0W5

5

R30

1/4W

620R

.

R29

1K5

C9

4N7 250V

C11

220N 250V

R31

1/4W

39R

.

R28

1/2W

1R

.

C10

2N2 400V

D

ZD8

16V0 1W0

G N

S

IRF630NPBF

Q11

6752

TO220

YEL

Q13

WC7

MJ21196

MJ21196

Q14

R33

1.0W

1R

FLMP

Q7

2N6517

R24

1/4W

220K

R70

1/4W

18K

Q8

BC550C

C12

22N 100V

R26

1/4W

470R

BC550C

Q9

BC560C

Q10

C30

22N 100V

R55

1/8W

220R0

FLMP

R34

1/4W

270R

+55V

R36

1/4W

68K

.

+55V

R37

1/4W

22K

.

R38

1/4W

22K

.

R39

1/4W

68K

.

-55V

-55V

C31

22N 100V

R51

1/8W

220R0

FLMP

R50

1/4W

270R

.

C13

22N 100V

C14

220N 250V

R49

1.0W

1R

FLMP

R44

1/2W

1R

.

R43

1/4W

470R

ZD9

1W0 16V0

R45

1K5

R46

1/4W

1K

CLIP

6

U2:B

5

4

C15

2N2 400V

R47

1/4W

39R

.

C16

470P 100V

6880

4N35 1

U2:A

2

R81

1/4W

220R

MINI

ZD11

3V0 0W5

MTP23P06

Q12

MJ21196

Q15

D22

MR854

MJ21196

Q17

YEL

EY9

D13

MR854

D14

MR854

Q16

MJ21196

Q23

Q18

MJ21196

MJ21195

Q22

MJ21195

Q24

D16

MR854

D17

MR854

MJ21195

Q21

MJ21195

MJ21196

Q19

D21

MR854

Q20

MJ21196

MJ21195

Q26

D18

MR854

MJ21195

Q25

+100V

D15

MR854

-100V

+55V

MJ21195

Q28

D19

MR854

-55V

MJ21195

Q27

D20

MR854

6

7

3392

BLK

OUTPUT -

W4

GNDA

8

BLU BLU

W11 EY10

R63

5R6

3820 L1

4UH

3392 OUTPUT +

W5

9

10

NET00070

NET00062

R65

1/4W

10R

.

11

12

13

14

15

M N O P Q R S

Product POWER AMP

AP4020 / V42 PCB# M1126 Sheet

Date: Tue Sep 04, 2012

Filename: M1126V13sch.sch2006

T U

Rev: V13

1 of 1

V

17

16

V

1

2

3

Score

Q15

Body

MJ21196

D13

Q16

MR854

6934

MJ21196

BlankSize - 14700x10800

YEL

EY9

Q17

MJ21196

D14

MR854

6934

Q18

MJ21196

BLU

M1126 AP4020 / V42

Q13

Q19

MJ21196

D15

MR854

6934

Q20

MJ21196

MJ21196

D22

Q14

MR854

6934

MJ21196

Q24

Q26

Q22

Q1

Q2

MJ21195

Q28

MJ21195

MJ21195

MJ21195

MR854

6934

D17

MR854

6934

D19

MR854

6934

D18

MR854

6934

D16

Q31

Q23 Q27

Q25

MJ21195

MJ21195

MJ21195 MJ21195

AS35FN

BEC

LOC

Q21

R63

ORIGIN

W5

5R6

5.

0W 6752

IRF630NPBF

.

{Watts}

TO220

R69

R68

C29

63V

6800U

10K

1/2W

10K

1/2W

W6

6800U

63V

C22

Top Assy

Pcb Mech

5895

5895

R66

R67

C28

6800U

63V

M1126

M1126

+55V

YEL

10K

1/2W

10K

1/2W

V13

5895

V13

Q30

6800U

63V

R

5895

Q29

MBS4992

10U

16V

C21

C23

C27

6800U

63V

R

T

GND

BLK

SOCKET

SOCKET UPSIDE DOWN

NORMAL

R T

10N

5834

C19

5895

L1

6800U

63V

R

T

C24

BLU

3R9

2.0W

R62

C26

TP10

R

T

5895

Q11

YEL

WC7

R29

6800U

63V

R T 5895

TP6

R45

C19A

C18A

50V 22U

R T

R

T

5895

-100V

R

T

C25

6874

.

Q15A

MJE350

Q12A

2N5551 R46A

BLU C11 C14

6873

.

Q16A

MJE340

39R0

R58A

10P

C23A

NORMAL LARGE

SOCKET WITH DIRECTION

TAB

C27A

C28A

D18A

C15

C26A

4U7

100V

6873

MJE340

Q18A

.

BC560C

R49A

R57A

4U7

100V

BC550C

C25A

Q20A

2K

101R0

6933

MTP23P06

.

{Watts}

TO220

Q12

ZD13

33V0

C32

10U 63V

R81

220R

4N35

180K

R88

4N35

180K

R89

C29A

6874

MJE350

Q19A

.

TP5A

6874

MJE350

6873

MJE340

.

TO126

7004

2SA2121-0

TO3P

.

TO126

TP7

R86

Q41

R84

200R0

470R 1N

Q8

.

C33

R83

Q4

200R0

Q3

Q6

BC550C BC560C

43K

R13

22U

50V

22U

50V

C5 C3

C6

Q40

BC550C

1U

63V

C8

ZD5

14V0

330U

25V

Q7

330U

25V

C7

RED 2.5"

RED 13"

BLK 4"

BLK 14"

RED

RED

BLK

BLK

7005

2SC5949-0

TO3P

.

Q5

D10

R40B

13K

C12

Q9

NL4MP-1

1+

12-

2+

3628

SPEAKON 4C

J2

68K

BAV21

R39

Q10

22N

C31

AP4020

M1126 1/2

V13

BLK BLK

EY3 EY8

M1126 2/2

AP4020

V13

B YEL YEL A

EY4 EY7

TP1

BLK 4"

BLK 24"

1-

RT1

BIAS TRIM

10K

270R

R34

TP9

NL4MP-1

1+

2+

3628

TP8

2-

J1

INSERT

ORIGIN

M1126 V13

FOR PRODUCT V42 DO NOT STUFF

WIRES IN EY2, EY4, EY6, AND EY8.

DO NOT STUFF WIRES OR SPEAKON

JACKS FOR SERVICE BOARDS.

SEE LAYOUT DOCUMENTATION

M1126 V13 PRODUCTION NOTES

1. MOUNTING DETAILS FOR 5W ADD #8629 SPACERS ONLY ON

5 WATT RESISTORS R29 AND R45. ENSURE SPACERS ARE UNDER

RESISTOR BODY ENOUGH TO RAISE IT OFF THE BOARD SURFACE.

2. MOUNTING HARDWARE FOR Q5 AND Q6.

#8902 - 4-40 X 3/4 PAN PHIL

#8485 ZINC #6 WASHER

Z234 CLAMP

T264 DEVICE

#3797 THERMO PAD

HEATSPREADER

PCB

#8701 4-40 KEPS NUT

TORQUE 4 INCH/LB

3. MOUNTING HARDWARE FOR Q40 AND Q41.

#3851 1/2 PCB PLASTIC SPACER

Z234 CLAMP

#3517 #8 NYLON WASHER

T126 TYPE DEVICE

SEE LAYOUT DIAGRAM

4. MOUNTING HARDWARE FOR Q11,Q12

#8741 4-40X 1/2" BOLT

#3501 BELL WASHER

#8667 SHOULDER WASHER

#3846 MICA

HEATSPREADER

T-220 DEVICE

TORQUE 4 INCH/LB

PCB

#8701 4-40 KEPS NUT

5. MOUNTING HARDWARE FOR TO3 OUTPUTS

#8663 SPACER

#8835 BOLT

TO-3 TRANSISTOR

#3916 THERMAL PAD

HEATSPREADER

#4060 SIL THERMO PAD

HEATSPREADER

PCB

#3851

SPCR

#4060

SIL-PAD

Z234

CLAMP

#8485

WASHER

#8902

440- SCREW

#8800 6-32 KEPS NUT

INITIAL TORQUE FOR TO-3'S IS 8 INCH/LB

FINAL TORQUE AFTER HEATSINK HAS

COOLED FROM WAVE SOLDER IS 6 INCH/LB

6. USE #2006 SMALL BODY 1R 1W FOR R33 AND R49.

7. MOUNTING DETAILS FOR Q30 TRIAC

USE #8799 TO MOUNT TRIAC Q30

1

8. TAB WIRE COLOURS: W6 RED 16AWG W7 YEL 16AWG

W8 BLK 16AWG W9 WHT 16AWG

W10 BLU 16AWG W5 OUTPUT +

W4 OUTPUT -

9. Q31 IS HAND INSERTED AND BENT OVER WITH FLAT SIDE

UP AS SHOWN.

10. DO NOT STUFF WIRES FOR MODEL V42 IN EY1, EY6, EY5, AND EY2.

IN AREA INDICATED ON BOARD 2/2

#3517

WASHER

CLAMP DETAIL - SEE NOTES 2 AND 3.

2

3

1/4"

BEND DOWN 1/4" FROM BODY OF THE TRANSISTOR

IMPORTANT: AFTER MOUNTING DEVICE DO NOT CUT LEGS

BEND LEGS IN DIRECTION SHOWN

IT IS IMPRATIVE THAT LEG MARKED 2 AND 3 ARE

BENT FLAT AGAINST THE COPPER SURFACE.

MODEL(S):-

2

# DATE

NOV/10/97

.

DEC/04/97

JAN/13/98

.

JUN/19/98

JAN/27/99

JUN/13/99

AUG/12/99

.

SEP/2004

JAN/24/02

.

3.00

.

5.00

6.00

.

8.00

.

8.20

8.30

M1126 Database History

AP4020

VER# DESCRIPTION OF CHANGE

1.01

.

1.20

1.30

01/NOV/07

.

PC#7076, REPLACE #6989 & #6990 WITH #7004 & #7005

SEE LAYOUT DIAGRAM

BC550C

BC560C

2N5401

2N5551

MPSA06

MPSA13

MPSA43

MPSA56

MPSA63

2N5401

2N5551

MPSA06

MPSA13

MPSA43

MPSA56

MBS4942

2N5401

2N5551

2N6517

MPSA13

MPSA43

MPSA56

MPSA63

C B E

TO-92

IRF830

MTP12P10

MTP10N15L

IRL2910

IRF5210

MTP2P50E

MTP8P20

IRF720

MTP23P06

IRF822

IRF4905

BD139

BD237

BD238

MJE340

MJE350

MJE271

MJE270

BD140

OUT

BF872

BF871

2N6556

2N6553

N/C

BD139

BD139

BD139

MAC224

E B C

TO-92

MJL21194

MJL1302A

MJL3281A

MJL21193

2SA2121-0

2SC5949-0

MJE11025

MJE11025

MJ21195

MJ21196

B

BOTTOM

VIEW

E

G D S B C E

B C E

B C E

Q15

D13

Q16

MR854

6934

Body

MJ21196

ETCH

GUIDE

YELL

EY9

D14

MR854

6934

Q18

MJ21196

Q17

MJ21196

M1126 AP-4020

Q19

MJ21196

D15

MR854

6934

Q20

MJ21196

Q13

MJ21196

D22

Q14

MR854

6934

MJ21196

Q24

MJ21196

BLUE

W11

Q26

Q22

X24

Q1

Q2

MJ21195

Q28

MJ21195

MJ21195

MJ21195

CLINCH

ORIGIN

Top Assy M1126

V1100

INSERT

ORIGIN

LONG AXIS

Q23

MJ21195

R69

R68

10K

1/2W

10K

1/2W

6800U

63V

R66

R67

C29

C28

10K

1/2W

10K

1/2W

6800U

63V

5895

W6

+100V

6800U

63V

5895

5895

W7

C22

+55V

C23

6800U

63V

5895

R T

MR854

6934

D17

MR854

6934

D19

MR854

6934

D18

MR854

6934

D16

Q31

Q27

Q25

MJ21195

MJ21195 MJ21195

Q21

R63

5.0W

5R6

4UH

C27

10U

16V

C21

W5

10N

5834

C19

L1

R

T

6800U

63V

R

T

5895

GND

W8

3820

R

6800U

63V

R

5895

C24

C26

3R9

2.0W

EY10

TP10

R62

R

6800U

63V

W9

5895

-55V

MJE350

C9

6752

IRF630NPBF

TO220

6933

MTP23P06

TO220

Q12

Q11

YELL

WC7

R29

R

TP6

6800U

63V

R

5895

R45

C25

R

T

-100V

220N 250V

BLUE 6"

220N 250V

C11 C14

W10

ZD13

C15

33V0

X21

10U 63V

C32

220R R81

4N35 U2

4N35 U1

180K

R88

180K

R89

TP7

Q41

R86

R84

470R

200R0

1N

Q8

1U

63V

C8

Q7

MJL1302A

Q6

R83 200R0

BC550C BC560C

C5

22U

50V

Q4

43K

Q3

R13

22U

50V

C3

MJE340

C6

14V0

330U

25V

330U

25V

ZD5

C7

C19A

BEC

LOC

ETCH

GUIDE

C18A

C27A

Q12A

2N5551

Q13A

C28A

H4

Q15A

MJE350

H3

Q16A

MJE340

Q18A

MJE340

D18A

39R0

R58A

10P

C23A

C26A

4U7

63V

BC560C

R49A

R57A

150K 2.0W

4U7

63V

C25A

Q20A

2K

101R0

H2

X31 C29A

Q19A

MJE350

H1

TP5A

BLK

BLK

ETCH

GUIDE

RED 2.5"

RED 13"

4"

14"

MJL3281A

R40B

13K

C12

Q9

Q5

D10

BAV21

68K R39

22N

Q10

C31

M1126 1/2

AP4020

V1100

BLK 3.5"

RED

EY2

EY5

RED

BLK

1-

EY6

1-

BLK

EY1

1+

2+

2+

NL4MP-1

J2

3628 B

EY8 EY3

M1126 2/2

AP4020

V1100

EY4 EY7 A

J1

1-

3628

1-

2+

2+

1+

YELL

2.5"

YELL

19"

TP1

X18

RT1

BIAS TRIM

10K

270R

R34

TP9

BLK 18"

TP8

ETCH

GUIDE

1

2

3

A B

Thermal Breaker

S1

DPDT Switch

S2

C

4

3700

K2:A

3721

3721

3700

K1:B

5

K1:A

6

K1:C

3700

7

8

D203

4007

100V 4U7

C203

Q201

5103

MPSA06

TO92

Q203

5101

BC550C

TO92

R211

1/4W

220K

MINI

Q202

5108

2N5401

TO92

K2:B

Q240

5103

MPSA06

TO92

D240

4007

4148

D207

9

10

W36:A 8

W36:B 8

W36:C 8

W36:D 8

W36:E 8

W36:F 8

W36:G 8

W36:H 8

1

2

3

4

7

8

5

6

W37:A 8

W37:B 8

W37:C 8

W37:D 8

W37:E 8

W37:F 8

W37:G 8

W37:H 8

4

5

6

7

8

1

2

3

11

A B C D

D

6

T1

YSL#CH1196

GENERIC_XF_2S_1P

7

3

2

1

5

4

E

C215

100V 4U7

Q241

5101

BC550C

TO92

R244

1/4W

220K

MINI

E

F

F

R243

1/4W

27K

.

R225

1/4W

470R

MINI

G H

MPSA06

TO92

Q208

5103

R227

1/4W

220R

MINI

I

* NOTE

R201A

R201B

R202A

R202B

AP4020 - M1127 V42-M1138

10K0 12K1

10K0 12K1

10K0 12K1

10K0 12K1

D211

4148

W39:B 4

W39:C 4

W38:B 2

2

3

{C_Type}

FAN

C213

470U 63V

FAN

FAN1

1

4

4 W39:A

4 W39:D

2 W38:A

G H I

{Function}

MJF6388

Q207

6815

T221D

J

J

K L

1

W35:A 12

2

W35:B 12

W35:C 12

3

W35:D 12

4

W35:E 12

5

W35:F 12

6

W35:G 12

7

8

W35:H 12

9

W35:I 12

10

W35:J 12

W35:K 12

11

12

W35:L 12

MJF6388

MJF6668

2N6517

2N5401

2N5551

MPSA06

MPSA13

MPSA43

MPSA56

MPSA63

BC550C

BC560C

C201A

33U 16V

C201B

33U 16V

M

R201A

1/4W

R202A

1/4W

.

*

.

*

R202B

1/4W

.

*

R201B

1/4W

.

*

N O

C214A

220P 100V

R203A

1/4W

10K0

MINI

MC33078P

U201:A

R204A

1/4W

10K0

MINI

C214B

220P 100V

R203B

1/4W

10K0

MINI

MC33078P

U201:B

R204B

1/4W

10K0

MINI

R213

1/2W

8K2

.

R215

1/4W

1K

MINI

P Q

1

2

3

4

{Function}

MJF6388

Q204

6815

T221D

R217

1/4W

10R

FLMP

5

U201:C

B C E

TO-221D

E B C

TO-92

C B E

TO-92 6

TAB

WC7.

CSA

C1E

680n

CSA

C2E

4n7

TAB

WC4.

TAB

WC17.

BLUE

TOROID

1075VA

230/245V_50Hz

YSL#CH1196E

BROWN

.

WC10.

TAB

245V

BROWN/BLK

230V

WC13.

TAB

TAB

DUMMY

TRANSFORMER SHOWN WIRED FOR

245VAC INPUT VOLTAGE. FOR

230VAC INPUT VOLTAGE OPERATION

BROWN LEAD TO WC10 AND

BROWN/BLACK LEAD TO

DUMMY TAB

WC14.

TAB

GREY

WC2.

TAB

RED

WC3.

TAB

YELLOW

WC6.

TAB

BLUE

WC18.

TAB

WHITE

R214

1/2W

8K2

.

R216

1/4W

1K

MINI

{Function}

MJF6668

Q205

6814

T221D

R218

1/4W

10R

FLMP

7

MODEL(S):-

#

5

6

7

8

9

10

11

12

13

1

2

3

4

1

2

3

4

5

6

7

8

9

10

11

12

13

DATE

OCT/97

.

NOV/13/97

.

NOV/25/97

DEC/12/97

JAN/21/98

.

MAR/27/98

JUL/15/98

.

OCT/27/99

APR/06/00

DEC/19/01

JAN/15/02

FEB/13/03

MAY/10/05

SEP/2005

.

03-JUN-2009

D

D

D

.

.

03-FEB-2010

X8013 Database History

AP4020 / V42

VER#

1.00

.

1.01

.

2.00

3.00

4.00

.

5.00

.

5.10

6.00

7.00

8.00

9.00

10.00

11.00

.

.

.

.

12.00

13.00

V

V

V

DESCRIPTION OF CHANGE

FIRST PRODUCTION

R232 150R->270R R233 270R ->470R

PC#5514 R232 270R->470R.

PC#5532 DELETE TRIAC ADD RELAY. R233 2R0->10R

ZD208,ZD209 20V->18V. U201 TL072->33078

8

UPDATE FOR AP4040

PC#5578 CORRECT SPACING FOR R228,R229, R230

PC#5579 REDO AC FOR 4N7. ADD DUMMY TABS FOR CE

PC#5649 ADD SURGISTORS. DELETE R233

PC#5797 R235/236 10K->8K2, ZD202 27V->22V

ZD210 6V2->4V7. ZD212 REPLACED BY JUMPER

PC#5695 ADD TP9, TP10 ENLARGE SOME TRACES

PC#6218 PADS AND HOLES FOR RELAY UPDATED

9

BRIDGE MOUNTING CHANGED

NEW SOLDERMASK FOR TABS

MOVE TRACES AWAY FROM WC6 (POTENTIAL SHORT)

REDO SOLDERMASK FOR 0.030

CONVERT TO PCAD2002

CREATE X8013, M1127 FOR AP4020 AND M1138 FOR V42

PC#7718,ONLY FOR V42. CHANGE R201A,R201B,R202A

R202B FROM 10K0 TO #4773 12K1 1% 1/4W

PER PCs 7718 and 7738 10

PC7935: Change C203, C215 from #5259 to #5269 GG

N

N

N

230 VAC 50 Hz LINE

K L M N O

.

.

Rev: 13V00

P Q

11

CLINCH

ORIGIN

M1127 AP4020

.

.

W26

YEL

BLK BLK

W31

R

T 22N

275V

W30 W29

FROM TB1 BLK

XFRM CT

W7

RED

BRIDGE

W24

W10

RED

W25

W8

BRIDGE

W22

W11

R

T

C207

C208

R

T

C1

R

T

W34

GRN

W33

GRN

.

.

D

1

W23

GRY

C210

R

T

C209 BEC

D240 Q240

BRIDGE MOUNTED

BY WIRING

63V

470U

R

T

63V

470U

LOC

M1127 AP4020

X41

M1138 V42

X40

W38

R B

Fan

W39

1 2

NO1

NO2

R235

C1

C2

PC-C

RELAY 1A

FAN

W9

BLK

R219

4148

22V0

D210

7K5

22N C204

1/2W

2R2

1/2W

2R2

1/2W

2R2

R228

-

R244

R245

100U

25V

R22 R23 R22

5 4 6

R

T

C215

4U7

100V

BC550C

RED

W12

FAN

BRIDGE

YEL

W3

YEL

W4

D

2

C212

Q210 ZD206

W17

RED

Q208

W19

BRIDGE

BRIDGE

W16

220R

4V7

R227

ZD207

GRY

W21

BRIDGE

W20

BRIDGE

BLU

W6

-100V

BLU

W5

-100V

BRIDGE MOUNTED

BY WIRING

BRIDGE

W18

X2

X3

X4

X28

X29 TO BOT AMP

X24

TO TOP AMP

W15

RED

W37

X9

1 8 1 8 X25

C214B

R203B

R204B

X21

4148

4148

10K0

220P

10K0

R202B

10K0

R201B

D201B

D202B

R

204A

U201

R

20

1A

R203A

C214A

X22

X27

10K0

W36

C201B

16V

33U

4148

4148

10K0

10K0

D201A

D202A

R202A

X20

10K0

X19

10K0

220P

16V

33U

C202A

K1

X18 X26

X17 WHT

W2

X8 C NC NO

W1

WHT

R214

8K2

1/2W

D203 4007

C203

R209

D207

1K5

1K5

R208

X7

4U7

100V

R206

R237

1M

R210

10K0

4148

2N5401

4007

D206

R211 220K

X11

X12

20V0

10K0

4K7

Q201

MPSA06

BC550C

ZD201

Q203

10R

18V0

X13

25V 100U

X15

X14

ZD209

18V0

R218

1K

ZD208

R215

10R

R217

MJF6388

Q207

MJF6668

Q205

INSERT

ORIGIN

LONG AXIS

VCD

Top Assy X8013

SEE LAYOUT DOCUMENTATION

MJF6388

Q204

13V00

SEE LAYOUT DIAGRAM

PRODUCTION NOTES:

M1127 AP4020

1 FOR C1 USE 22N FOR NORTH AMERICAN AND 680N FOR EURO.

2 ADD RTV UNDER RELAY AND BEND LEADS FLAT TO PCB.

RELAY

RTV

PCB

X8013 Database History

MODEL(S):-

#

3

4

5

6

1

2

7

8

9

10

11

12

13

DATE

.

OCT/97

NOV/13/97

NOV/25/97

.

.

DEC/12/97

JAN/21/98

MAR/27/98

JUL/15/98

.

OCT/27/99

APR/06/00

1

2

3

4

5

6

7

8

9

10

11

12

13

DEC/19/01

JAN/15/02

FEB/13/03

MAY/10/05

SEP/2005

03-JUN-2009

D

D

D

.

.

.

03-FEB-2010 .

.

.

V

V

V

8.00

9.00

10.00

11.00

12.00

.

13.00

AP4020 / V42

VER# DESCRIPTION OF CHANGE

.

1.00

1.01

2.00

.

3.00

4.00

.

5.00

5.10

.

6.00

7.00

FIRST PRODUCTION

R232 150R->270R R233 270R ->470R

PC#5514 R232 270R->470R.

PC#5532 DELETE TRIAC ADD RELAY. R233 2R0->10R

ZD208,ZD209 20V->18V. U201 TL072->33078

UPDATE FOR AP4040

PC#5578 CORRECT SPACING FOR R228,R229, R230

PC#5579 REDO AC FOR 4N7. ADD DUMMY TABS FOR CE

PC#5649 ADD SURGISTORS. DELETE R233

PC#5797 R235/236 10K->8K2, ZD202 27V->22V

ZD210 6V2->4V7. ZD212 REPLACED BY JUMPER

PC#5695 ADD TP9, TP10 ENLARGE SOME TRACES

PC#6218 PADS AND HOLES FOR RELAY UPDATED

BRIDGE MOUNTING CHANGED

NEW SOLDERMASK FOR TABS

MOVE TRACES AWAY FROM WC6 (POTENTIAL SHORT)

REDO SOLDERMASK FOR 0.030" SPREAD

CONVERT TO PCAD2002

CREATE X8013, M1127 FOR AP4020 AND M1138 FOR V42

PC#7718,ONLY FOR V42. CHANGE R201A,R201B,R202A

R202B FROM 10K0 TO #4773 12K1 1% 1/4W

PER PCs 7718 and 7738

PC7935: Change C203, C215 from #5259 to #5269 GG

N

N

N

SEE LAYOUT DIAGRAM

PIN CONFIGURATION

BC550C

BC560C

2N6517

2N5401

2N5551

MPSA06

MPSA13

MPSA43

MPSA56

MPSA63

MJF6388

MJF6668

C B E

TO-92

E B C

TO-92

B C E

TO-221D

9

1

2

3

4

5

A B

W2

C

* NOTE:

M1128 - FOR R34 NAD R47 USE #4821 470R

M1133 - FOR R34 AND R47 USE #4808 2K

D E F G H

0W5 D2

4V7

1N750ARL

R50

1/4W

15K

.

10K

AUD

4390

M

P2

Function

Q6

BC560C

TO92

5102

C9

470N 63V

*

C26

33U

R44

1/4W

1K

MINI

16V

R7

1/4W

4K7

MINI

R43

1/4W

82K

MINI

D6

4148

R45

1/4W

14K7

.

C41

100P 100V

BC560C

Q5

5102

TO92

MINI

4K7

1/4W

R18

.

15K

1/4W

R19

R16

4W 22M

.

LM13600N

U4:A

R15

4W 22M

.

MINI

4K7

1/4W

R17

.

15K

1/4W

R20

LM13600N

U4:B

C17

47P 100V

R35

1/4W

78K7

.

MC33078P

U2:B

C38

220P 100V

I J

MINI

47K

1/4W

R28

FLMP

249R

1/8W

R24

FLMP

249R

1/8W

R23

.

15K

1/4W

R25

FLMP

249R

1/8W

R22

FLMP

249R

1/8W

R21

.

15K

1/4W

R26

MINI

47K

1/4W

R27

K

8

7

6

BC550C

BC560C

2N5401

2N5551

MPSA06

MPSA13

MPSA43

MPSA56

MPSA63

C B E

TO-92

E B C

TO-92

6840_PC

R39

1/4W

15K

.

M

Q3

BC560C

TO92

5102

C10

470N 63V

10K

AUD

4390

P1

Function

*

C25

33U 16V

R41

1/4W

1K

MINI

C37

220P 100V

R8

1/4W

4K7

MINI

D9

4148

R46

1/4W

82K

MINI

C40

100P 100V

R40

1/4W

14K7

.

BC560C

Q4

5102

TO92

MINI

4K7

1/4W

R54

.

15K

1/4W

R59

R57

4W 22M

.

LM13600N

U3:B

R65

4W 22M

.

MINI

4K7

1/4W

R63

.

15K

1/4W

R38

LM13600N

U3:A

C18

47P 100V

R42

1/4W

78K7

.

MC33078P

U2:A

MINI

47K

1/4W

R56

FLMP

249R

1/8W

R58

FLMP

249R

1/8W

R37

.

15K

1/4W

R62

FLMP

249R

1/8W

R61

FLMP

249R

1/8W

R60

.

15K

1/4W

R55

MINI

47K

1/4W

R64

10

11

6745_PC

A B C D E F G H I J K

L M N O P Q

1

R1

1/4W

100K

.

63V 220N

C22

MPSA63

Q2

5106

TO92

2

3

1

4

5

2

3

12 W1:A

12 W1:B

12 W1:C

8

9

10

6

7

12 W1:D

12 W1:E

12 W1:F

12 W1:G

12 W1:H

11

12

12 W1:I

12 W1:J

12 W1:K

12 W1:L

4

5

6

.

100K

1/4W

R2

C21

220N 63V

MPSA13

Q1

5105

TO92

7

U2:C

100N

63V

C5

100N

63V

C7

100N

63V

C6

100N

63V

C8

(VCC)

LM13600N

U3:D

6745

Dual VCA

{Function}

(VCC)

LM13600N

U3:C

6745

Dual VCA

{Function}

8

(VCC)

LM13600N

U4:C

6745

Dual VCA

{Function}

(VCC)

LM13600N

U4:D

6745

Dual VCA

{Function}

9

10

L M N O P

Rev: 8V00

Q

11

M1128 AP-VX

CLINCH

ORIGIN

M1128

M1133

X17

X24

AP-VX

VTC

RCLP

PRTCT

LVGND

V-

X12

V+

X14

LD4

+

63V

4U7

R51

C36

R136

1K2

22M

R16

W1

1

LD6

GRN

+

249R

249R

6

2329

12

To Power Supply Pcb

X9

R1 100K

X1

X13 21in 14C

3604

Q6

BC560C

C9

5908

RED

+

LD3

-

-

R49 15K

470R R47

C1

RED

+

X4

470N

R53

D6

100N

4148

620R

1K

470N

C5

R5

62K

10K

4K7

X8

8M2

R7

Q5

R52

R48

Q1

15K

-

-

220P

470K

R3

15K

R15

R26

LD1

249R

R22

249R

47K

R20

LM13600N

R24

R23

R50

3V0

U4

R2

100K

X11

P2

D1

R21

R27

15K

15K

Channel A

220R

10K

C26

R42

X15

X10

AUD

C18

47P

78K7

R39

C10

15K R32

10K R33

R34

470R

220P

D9

X6

C35

4148

D2

R4

470K

Q2

X23

LD5

C22

3V0

+

-

RED

62K

C4

R55A

620R

14K7

220R

MPSA63 R Clip

R Activity

+

R45

GRN

-

R55B

R43

82K LD2

78K7

R35

47P

C17

X16

1K

220P

C38

100P

C41

R44

Q4

BC560C R62

R58

C2

15K

LM13600N

U2

MC33078P

100P

C40

C37

82K

14K7

R46

R40

22M

15K

R65

R38

249R

R61

Channel B

X21

P1

AUD

10K

16V

33U

C25

249R

47K

R64

C7

C8

100N

R60

INSERT

ORIGIN

LONG AXIS

VCD StepAndRepeat - [email protected]@3.300

SEE LAYOUT DOCUMENTATION

SEE LAYOUT DIAGRAM

X8011 PRODUCTION NOTES M1128 AP/VX

1.

P22

POT

2.

PCB 3511

WASHER

8870

SCREW

LED

SPACER

PT#3739

SEE LAYOUT DIAGRAM

X8011 PCB_DATABASE_HISTORY

#

3

4

5

6

1

2

7

8

9

10

11

12

13

1

2

3

4

5

6

7

8

9

10

11

12

13

MODEL(S):-

AP4020 AND AP4040/VX2400 AND VX2402/V42 AND V44

DATE VER# DESCRIPTION OF CHANGE

OCT/97

APR/17/98

.

DEC/09/98

.

.

ADDED

NOV/20/01 3.10

PC#6466 LD7,LD8 NSL28AA->NSL32SR2

JUL/09/02

OCT/25/02

.

.

.

APR/15/05

JUN/05/06

1.00

FIRST PRODUCTION

2.00

#5664 RIBBON CABLE CONNECTIONS CHANGED FOR

.

PROTECT CIRCUIT

3.00

PC#5736 TRACES CHANGED POT SUPPORT SCREWS

.

.

.

4.00

PC#6401 PARTS MOVED NEAR P2

4.10

PC#6568 R44/R41 10K->1K

5.00

PC#6873 REDO SOLDERMASK

6.00

PC#7138:GT:CONVERT TO PCAD2002. CHANGE OPTO

LIMITER TO 13600 #6745 LIMITERS FOR ROHS

REPLACE C3,C4,C9 AND C10 WITH #5234 470N 63V

REPLACE R31 AND R51 WITH #6139 62K 1/4W

.

.

D

D

D

D

D

D

D

D

.

JUN/23/08

28-MAY-2009

.

REPLACE R4 WITH #6127 470K 1/4W

7.00

Removed shear, solder update, std board size

.

8.00

.

V

V

V

V

V

V

V

V

CREATE X8011, M1128 FOR AP, VX AND M1133 FOR VTC

PC#7717, 7718 - M1133,V42 AND V44 CHANGE R34

AND R47 FROM 470R TO 2K #4808

N

N

N

N

N

N

N

N

MODEL(S):-

#

1

2

3

4

5

6

DATE

D

D

D

D

D

D

MODEL(S):-

#

1

2

3

4

5

6

PC#

PC

PC

PC

PC

PC

PC

X8011 DRILL HISTORY

AP4020 AND AP4040/VX2400 AND VX2402/V42 AND V44

VER# DESCRIPTION OF CHANGE

V

V

V

V

V

V

N

N

N

N

N

N

X8011 PENDING CHANGES

PENDING CHANGE

X

X

X

X

X

X

AP4020 AND AP4040/VX2400 AND VX2402/V42 AND V44

*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY

LEAD/PIN REFERENCE

BC550C

BC560C

2N5401

2N5551

MPSA06

MPSA13

MPSA43

MPSA56

MPSA63

C B E

TO-92

E B C

TO-92

3

4

1

A

2

7

8

5

6

9

10

14

15

16

17

A

11

12

13

B C

B C

J1

LINE XLR

J3 S

-

R

-

T

-

D E

R27

1/4W

R25

1/4W

D E

R22

1/4W

9K76

0.1%

R26

1/4W

9K76

0.1%

F

F

G H

C9

220P 100V

R23

1/4W

9K76

0.1%

C34

68N 100V

U4:A

MC33078P

C10

220P 100V

R24

1/4W

9K76

0.1%

C30

150N 63V

G H

C33

C29

R20

1/4W

I

68N 100V

150N 63V

L

S3:A

3705

COM

M

MONO-STEREO-BRIDGED

R L

S3:B

3705 MONO-STEREO-BRIDGED

COM

M R

R111

1/4W

1/8W

10R

L

3705

COM

M R L

COM

M R

MC33078P

U1:B

R37

1/4W

I

LIMITER

R38

1/4W

J K

U3:A

MC33078P

FILTER SW

S2:A

S1:B

U1:C

C23

33U 16V

J K

U4:C

L M

J4

-

S

-

R

-

T

J2

3657_OBS

Tie-net Name

Copper

Tie Here

Copper

Tie Here

R13

1/4W

R11

1/4W

R16

1/4W

9K76

R12

1/4W

9K76

0.1%

100V 220P

C8

R15

1/4W

9K76

MC33078P

U1:A

C31

68N 100V

100V 220P

C7

R14

1/4W

9K76

0.1%

C27

150N 63V

C32

68N 100V

C28

150N 63V

R18

1/4W

GND LIFT

C1

22N 275V

MC33078P

U3:B

FILTER SW

C24

33U 16V

S1:A

U4:B

MC33078P

U3:C

L M

W1

N O

N O

P

P

Q

Q

R S T U

11

12

MODEL(S):-

5

6

7

8

9

10

11

12

13

2

3

4

#

1

.

DATE

OCT/97

NOV/97

DEC/02/97

APR/16/98

JUL/01/98

SEP/06/01

APR/15/05

JUL/2005

AUG-15-2005

D

D

D

6

7

8

4

5

9

10

11

12

13

MODEL(S):-

1

#

2

DATE

OCT/1997

NOV/12/97

DEC/02/97

D

D

D

D

D

D

D

APR/22/98

SEP/06/01

JUL/2005

M1129 Database History

AP2020 AP4020 AP4040 AM1CE

VER#

1.00

.

2.00

.

V

V

V

.

3.00

4.00

4.10

5.00

6.00

DESCRIPTION OF CHANGE

FIRST PRODUCTION

SWITCH NETS RREF WITH LREF AND RSPRE WITH

LSPRE AT 14 PIN CONNECTOR. INPUT TO NONINVERTING

CHANGE C27, C29, C28, C30 TO 150N

PC#5694 PINS 10-12 OF MC2 CONNECTED TO BRG SWT

ISOLATE PIN OF S3

PC#6436 REPLACE R119 (10K0) WITH JUMPER X119

PC#6873 REDO SOLDERMASK

CONVERT TO PCAD2002, PC#6944:ROUTE GAUGE,

PC#6914:ADD TARGETS

N

N

N

M1129.sch_schematic-DATABASE_HISTORY

AP4020 / AP4040 / AP2020 / AM1CE

VER#

1.00

.

2.00

V

V

V

V

V

V

V

2.10

2.20

3.00

DESCRIPTION OF CHANGE

FIRST PRODUCTION

REVERSED INPUT POLARITY. MODIFIED FOR AP2020

C27, C28, C29, C30 TO 150n

DELETE R119

CONVERT TO PCAD2002

N

N

N

N

N

N

N

13

14

15

16

17

R S T U V

V

1

2

3

4

7

8

5

6

9

10

S4 S2 S1

S3 W2

3417

DM

BM

DR

BR

DC

BC

DL

BL

CR CC

AC

CM

AMAR

CL

AL

3436 3436

BRIDGED - STEREO - MONO

C1

10R R112

C28

150N

W4

33K

3436

W3

C13

100N

100N

C14

7 6

R T

5

X42

10R

X10

X9

R111

C24

16V

33U

4

LSPRE

3 2

C23

1

X39

RSPRE

5

TP

X41

8 9

14 PIN SCKT

10 11 12 13 14

X11

X12

X40

X38 X35

X13

T

P

2

R6

C27

R19

4148

U3

MC33078P

4148

D7

D4

R109A

4M7

68N

C32

R109B

4M7

150N

68N

C29

C33

C34 C30

R38

TP3

10K0

TP4

U1

X36

U4

R15

9K76

220P

100N

220P

220P

C6

J2

CLINCH

ORIGIN

TIP-SW -

W RING

7

-

TIP

RING

SL-SW -

SLEEVE

J4

INSERT

ORIGIN

LONG AXIS

VCD

X15

100N

C39

X16

LINE XLR J1

BEC

LOC

X32

9K76

220P

100N

220P

220P

C9

R23

C16

C12

C11

1K54

R25

1K54

R27

X33

X34

TIP-SW -

TIP

W RING

7

-

RING

SL-SW -

SLEEVE

MODEL(S):-

#

3

4

5

6

1

2

7

8

9

10

11

12

13

DATE

OCT/1997

NOV/12/97

DEC/02/97

APR/22/98

D

D

D

SEP/06/01

JUL/2005

D

D

D

D

M1129.sch_schematic-DATABASE_HISTORY

AP4020 / AP4040 / AP2020 / AM1CE

VER# DESCRIPTION OF CHANGE

V

V

V

V

V

V

1.00

2.00

.

2.10

2.20

3.00

V

FIRST PRODUCTION

REVERSED INPUT POLARITY. MODIFIED FOR AP2020

C27, C28, C29, C30 TO 150n

PC#5694 ADD NETS BRPRTCT, LVGND-28 TO BRG SW

DELETE R119

CONVERT TO PCAD2002

N

N

N

N

N

N

N

M1129 DRILL HISTORY

1

2

3

4

5

6

#

MODEL(S):-

AP2020/AP4020/AP4040/AM1CE

DATE VER# DESCRIPTION OF CHANGE

APR-03-2003 V06 N

AUG-15-2005 V07 CONVERT TO PCAD2002

D

D

D

D

V

V

V

V

N

N

N

N

M1129 Database History

MODEL(S):-

#

3

4

5

6

1

2

7

8

9

10

11

12

13

DATE

OCT/97

NOV/97

.

DEC/02/97

APR/16/98

JUL/01/98

SEP/06/01

APR/15/05

JUL/2005

AUG-15-2005

D

D

D

AP2020 AP4020 AP4040 AM1CE

.

.

1.00

2.00

3.00

4.00

4.10

5.00

6.00

.

V

V

V

VER# DESCRIPTION OF CHANGE

FIRST PRODUCTION

SWITCH NETS RREF WITH LREF AND RSPRE WITH

LSPRE AT 14 PIN CONNECTOR. INPUT TO NONINVERTING

CHANGE C27, C29, C28, C30 TO 150N

PC#5694 PINS 10-12 OF MC2 CONNECTED TO BRG SWT

ISOLATE PIN OF S3

PC#6436 REPLACE R119 (10K0) WITH JUMPER X119

PC#6873 REDO SOLDERMASK

CONVERT TO PCAD2002, PC#6944:ROUTE GAUGE,

PC#6914:ADD TARGETS

N

N

N

MODEL(S):-

1

2

3

4

5

6

# PC#

PC

PC

PC

PC

PC

PC

M1129 PENDING CHANGES

PENDING CHANGE

X

X

X

X

X

X

AP2020/AP4020/AP4040/AM1CE

*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY

M1129 PRODUCTION NOTES

1 FOR XLR #3657 USE SCREW PT#8829

UP THROUGH THE BOTTOM

2 FOR M1129B VX1200/2400/J/2402

DO NOT STUFF X40 AND X41

ADD WIRES IN BOARD ASSEMBLY

SERVICE BULLETIN

AP4020 &

AP4040

Quick Fix for M1146 & M1126

To speed up the servicing of the AP4020 or AP4040 on your bench, Yorkville

Sound’s service department has developed a method to replace the components most likely to fail when a M1146 amplifier board requires service.

This Quick Fix kit contains the procedure, assembly drawings, and components to perform the Quick Fix to a M1146 or M1126 board.

It should be understood that the person using this procedure knows how to test resistors, diodes, and transistors to determine if they are defective. This procedure is not intended to be a substitute for one’s lack of electronic capability.

Before starting, look at the board for repair and locate the version number.

It is very important that you follow the procedure for the appropriate circuit board version number.

A complimentary service manual for the AP4020 power amplifier is supplied with this M1146KIT.

STEP 1. Locate the assembly drawing for the version number printed on the M1146 or M1126 circuit board to be serviced.

STEP 2. Remove all of the transistors coloured RED on the assembly drawing.

STEP 3. Measure and remove any of the diodes coloured BLUE on the assembly drawing that may be damaged. Replace a 1N4732A 1W

4V7 zener (#6459) ZD12 along with a series 0.5 ohm R85 resistor.

STEP 4. Rotate the trim pot RT1 fully counter - clockwise as in figure 1.

Inspect and replace any resistors that look burnt. Measure all of the resistor values coloured YELLOW on the assembly drawing.

The value that you measure may not be exactly what is shown on the assembly drawing but if the resistor doesn’t look damaged it should measure within + or – 5% of the printed value.

REAL Gear.

REAL People.

Canada

Voice: (905) 837-8481

Fax: (905) 837-8746

U.S.A.

Voice: (716) 297-2920

Fax: (716) 297-3689 w w w . y o r k v i l l e . c o m

Yorkville Sound

550 Granite Court

Pickering, Ontario

L1W-3Y8 CANADA

Yorkville Sound Inc.

4625 Witmer Industrial Estate

Niagara Falls, New York

14305 USA

1

SERVICE BULLETIN

AP4020 &

AP4040

Figure 1

STEP 5. Measure the resistor coloured GREEN. The measured value should measure within + or – 5% value listed in the table below. Replace any resistor that measured beyond the + or –

5% value listed in the table below.

RESISTOR

NUMBER

R10

PRINTED

VALUE

4K7

CORRECT

MEASURED VALUE

-5%

3K08 3K25

+5%

3K41

REAL Gear.

REAL People.

Canada

Voice: (905) 837-8481

Fax: (905) 837-8746

U.S.A.

Voice: (716) 297-2920

Fax: (716) 297-3689 w w w . y o r k v i l l e . c o m

Yorkville Sound

550 Granite Court

Pickering, Ontario

L1W-3Y8 CANADA

Yorkville Sound Inc.

4625 Witmer Industrial Estate

Niagara Falls, New York

14305 USA

1

SERVICE BULLETIN

AP4020 &

AP4040

STEP 6. Measure across the pair of test points shown in the component layout listed in the table below. If the measured value is not within + or – 10% of the value listed in the table then replace the resistors shown in the table below.

TEST

POINTS

R10

LAYOUT

REFERENCE

4K7

CORRECT

MEASURED VALUE

LAYOUT

REFERENCE

-10%

15ohm 17ohm

+10%

19ohm

R11, R12, R14

STEP 7. Measure the resistors coloured ORANGE. Since the value of these resistors is 0.1 ohm, your ohmmeter will measure the higher series resistance of the test leads if the resistor is OK. If the resistor is damaged your ohmmeter will read a very high resistance (an open circuit). Replace any damaged resistors.

STEP 8. Measure the output TO–3 transistors (Q13 to Q28) to determine if any are damaged. Mark any damaged transistors with a marking pen.

STEP 9. Replace any output transistors that you have marked as being damaged. Replace any diodes that you have found to be damaged. Replace all of the red transistors that were removed.

STEP 10. Inspect the traces on the circuit board for any that have ‘fused’ open or looklike they got very hot. Bridge and solder a piece of wire over any damaged traces.

AFTER YOU HAVE REPLACED ALL OF THE NECESSARY COMPONENTS INSPECT

THE REPAIRED BOARD FOR ANY MISSING PARTS, CORRECT VALUES IN THE COR-

RECT POSITION AND THAT ALL COMPONENTS ARE SOLDERED.

REAL Gear.

REAL People.

Canada

Voice: (905) 837-8481

Fax: (905) 837-8746

U.S.A.

Voice: (716) 297-2920

Fax: (716) 297-3689 w w w . y o r k v i l l e . c o m

Yorkville Sound

550 Granite Court

Pickering, Ontario

L1W-3Y8 CANADA

Yorkville Sound Inc.

4625 Witmer Industrial Estate

Niagara Falls, New York

14305 USA

2

SERVICE BULLETIN

AP4020 &

AP4040

Testing Repaired Circuit Boards

Now that you have rebuilt the M1146 or M1126 circuit board. It is just as important to properly power up the board. If the sinewave doesn’t look right check the signal at test point (1) to ensure that the voltage amplifier isn’t distorting the signal. If there is still a damaged part on the board instantly turning it on could blow up the board and you would be back where you started.

Connect the power wires and ground to the power supply. Connect a digital multimeter to test pins 8 and 9 to measure the bias quiescent current and place a scope probe on the speaker output. Be sure to turn the quiescent current trimpot RT1 fully counter clockwise.

Now using a variac slowly turn up the AC main voltage while monitoring the quiescent voltage and the speaker output trace on the scope. Watching these two test points is a good indicator of the health of the board. If you have a second multimeter connect it up from the speaker output to test point 4 or 5. As you variac up also check these DC battery voltages to ensure that they both increase in voltage to approximately +12 or –12 vdc.

If the board looks OK after variacing up to 120vac then slowly turn up the bias (RT1 trimpot) to obtain 3 to 5 millivolts of bias voltage on test points 8 and 9. Check the speaker output with a 1KHZ sinewave with no load. If this looks good place the minimum rated load (4 Ohm for M1126, 2 Ohm for

M1146) on the speaker output and increase the sinewave amplitude to the point of clipping. If the signal looks free of oscillation, place a short across the speaker posts. The amplifier should go into protect mode after 1/10 of a second. Remove the short and the sinewave will appear 6 seconds later.

Reassemble the complete amplifier and run just clipping music or pink noise into the minimum rated speaker load for that model of amplifier. Let the amplifier heat up for 20 minutes. This will check the thermal mounting of the transistors and for any weak parts not caught during troubleshooting.

If the amplifier passes this test the product is ready to return to the customer.

REAL Gear.

REAL People.

Canada

Voice: (905) 837-8481

Fax: (905) 837-8746

U.S.A.

Voice: (716) 297-2920

Fax: (716) 297-3689 w w w . y o r k v i l l e . c o m

Yorkville Sound

550 Granite Court

Pickering, Ontario

L1W-3Y8 CANADA

Yorkville Sound Inc.

4625 Witmer Industrial Estate

Niagara Falls, New York

14305 USA

2

4 "

L N

15 "

17"

1196E

A P4020C E AC WIR IN G OC T,24,2000

S H OW N WIR E D FOR 245V

BROWN

GREY

YELLOW

GREY

BLUE

EY GR

EY GR

RED

RED

D RE

M 1127-5. 00

BLACK

WHITE