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AP4040

WEB: www.yorkville.com
WORLD HEADQUARTERS CANADA Yorkville Sound
550 Granite Court Pickering, Ontario L1W-3Y8 CANADA Voice: (905) 837-8481 Fax: (905) 837-8746

U.S.A. Yorkville Sound Inc.
4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA Voice: (716) 297-2920 Fax: (716) 297-3689

MODEL TYPE: YS4040

SERVICE MANUAL
Quality and Innovation Since 1963
Printed in Canada
Manual-Service-ap4040-00-4v0.pdf

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.
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:

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
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:

Power Sources

Alimentation

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. 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.

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. 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.

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.

Cordon d'Alimentation

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.

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

AP4040 Parts List 3/17/2010
YS # 5906 5908 6419 6425 6438 6825 6934 6429 6432 6433 6439 6440 6450 6461 6463 6465 6822 6824 5101 5102 5103 5105 5106 5108 5113 5114 6854 6752 6814 6815 6873 6874 6925 6909 6910 7004 7005 6745 6840 5190 6478 6489 6517 6880 5401 5197 5203 5410 5412 5201 5208 5273 5416 5422 5209 5210 5834 6435 6451 5212 5226 5228 5229 5231 5234 5314 5882 5255 5258 5259 5269 5260 5282 5629 5945 5961 5267 5619 5621 5630 Description 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 1N4007 1000V 1A0 DIODE T&R 1N4148 75V 0A45 DIODE T&R MR854 400V 3A0 DIODE FASREC 1N4747A 20V0 1W0 ZENER 5% T&R 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 1N5240BRL 10V0 0W5 ZENER 5% T&R 1N5251BRL 22V0 0W5 ZENER 5% T&R 1N5250B 20V0 0W5 ZENER 5% T&R 1N4745A 16V0 1W0 ZENER 5% T&R 1N5246B 16V0 0W5 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 MPSA13 TO92 NPN DARL T&R TA MPSA63 TO92 PNP DARL T&R TA 2N5401 TO92 PNP TRAN T&R TA MPSA42 TO92 NPN TRAN T&R TA MPSA92 TO92 PNP TRAN T&R TA 2N6517 TO92 NPN TRAN TA MTP10N15L TO220 NCH MFET TN MJF6668 T221D PNP TRAN DARL TJ MJF6388 T221D NPN TRAN DARL TJ MJE340 TO126 NPN TRAN TG MJE350 TO126 PNP TRAN TG MTP8P20 TO220 PCH MFET TN MJ21196 TO3 NPN TRAN TH MJ21195 TO3 PNP TRANSISTOR TH 2SA2121-0 TO3P PNP TRAN TK 2SC5949-0 TO3 NPN TRANSISTOR TK LM13600N IC XCONDUCTANCE AMP MC33078P IC DUAL OP AMP MBS4992 TO92 8V5 DIAC T&R AS35FN-TO92 TEMPERATURE SENSOR __5R 20% THERMISTOR-SURGR NTC STM-BTB-600BRG TO220 ??A TRIAC 600V 4N35 OPTO-COUPLER _10P 500V 5%CAP T&R RAD CER.2NPO 220P 100V 2%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 10%CAP T&R BEAD NPO 470P 100V 5%CAP T&R RAD CER.2NPO __2N2 400V 5%CAP T&R RAD .2FLM __1N5 200V 5%CAP T&R RAD CER.2NPO 470P 50V 10%CAP T&R BEAD NPO __1N 50V 10%CAP T&R BEAD NPO __4N7 250V 5%CAP T&R RAD .2FLM _22N 100V 10%CAP T&R RAD .2FLM _10N 250V 20%CAP BLK RAD POLY FLM _22N 275V 20%CAP BLK 'X2' 15MM AC __4N7 250V 20%CAP BLK 'Y' 10MM AC 100N 63V 5%CAP T&R RAD .2FLM _68N 100V 5%CAP T&R RAD .2FLM 100N 100V 5%CAP T&R RAD .2FLM 150N 63V 10%CAP T&R RAD .2FLM 220N 63V 10%CAP T&R RAD .2FLM 470N 63V 10%CAP T&R RAD .2FLM 100N 50V 10%CAP T&R BEAD X7R 220N 250VDC 10%CAP BLK RAD PLY FLM __1U 63V 20%CAP T&R RAD .2EL __4U7 63V 20%CAP T&R 8X7MM .2EL __4U7 63V 20%CAP T&R RAD .2 __4U7 100V 20%CAP T&R RAD LESR2 _22U 50V 20%CAP T&R RAD .2EL _10U 16V 20%CAP T&R 5X7MM .2NP _10U 160V 20%CAP BLK 10X13MM EL _10U 63V 20%CAP T&R RAD .2EL _33U 16V 20%CAP T&R RAD .2 100U 25V 20%CAP T&R RAD .2EL 330U 100V 20%CAP BLK 12X25MM EL 470U 63V 20%CAP BLK 12X25MM EL 330U 25V 20%CAP BLK 10X13MM EL Qty. 3 3 2 4 15 52 20 1 2 4 2 9 4 1 1 1 4 2 14 14 3 2 1 2 2 2 3 2 1 2 6 6 2 16 16 2 2 2 5 2 2 2 2 4 4 3 2 2 13 2 12 2 2 2 2 11 2 2 1 4 4 3 4 2 4 2 4 3 2 4 2 8 2 4 2 12 3 4 1 6 YS # 5896 4390 4520 2448 3820 3485 3486 3489 3490 3601 3410 3415 3918 3628 3417 3657 3451 9198 7584 8432 8434 3894 3501 3803 3810 3827 3852 2328 2329 4056 8433 8661 8437 3468 3821 8261 8701 8793 8760 8800 8854 8720 8797 3797 3846 3916 4060 8432P 4597 4599 5299 4745 4749 2005 2006 4677 4688 4911 4748 4733 2009 2037 4605 4875 4930 2039 2014 2016 2041 4899 2042 4811 4984 2045 2021 2023 4857 4977 2024 4867 Description 4700U 80V 20%CAP BLK 25X50MM ELS _10K AUD 16MM DETENT P22 _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 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 6-32 SCREW TERMINAL PC MNT SNAP-IN XLR FEML PCB MT HORZ NO SHELL 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 AAVID 5972-B H/S W/TAB B.O. 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 8 CIR XH-HEADER 0.098IN 12 CIR XH-HEADER 0.098IN 2 CIR XH-HEADER 0.098IN KNOB AP SERIES PLASTIC KNOB BUTTON FLAT GREY FAN FILTER LABEL 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 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 TO220 THERMO PAD LARGE HOLE 56359B TO3 SIL-PAD REPLACES MICA SILPAD 1500ST 0.900 X 0.725BERQUIST 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 1/8W 33R 2%FLAME PROOF T&R RES 1/8W 39R 2%FLAME PROOF T&R RES 1/4W 39R0 FUSIBLE T&R RES 1/4W 39R 5% T&R RES 1/4W 47R0 FUSIBLE T&R RES 1/4W 68R 5% 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 1/8W 220R0 1%FLAME PROOF T&R RES 1/4W 220R 5% T&R RES 1/4W 220R 5%MINI T&R RES 1/8W 249R 2%FLAME PROOF T&R RES 1/4W 270R 5% T&R RES Qty. 16 2 2 1 2 4 14 3 4 2 1 1 2 2 1 2 68 1 1 1 1 8 23 1 12 11 1 4 2 1 2 3 1 1 1 0.348 20 3 64 5 4 2 1 4 8 32 4 1 23 120 10 12 4 2 4 4 3 8 4 2 2 6 1 2 1 2 4 2 10 6 4 2 4 8 6 4 2 7 12 2 YS # 4986 4855 4821 4980 4891 5019 4873 4934 4981 4854 4988 4791 4808 6113 4847 6124 4826 6136 4744 4681 4943 4982 4887 4990 4762 4800 4829 4983 6116 4856 5008 4630 4830 4771 6125 6123 4777 4632 6118 4833 4840 6122 4878 6119 4835 6139 5007 4586 4898 4838 6120 4851 4886 4668 6126 6127 4844 4948 4951 6132 4751 3618 3604 3699 3735 8870 8865 8729 8742 8861 8741 8871 8902 8799 8832 8801 8829 8761 8796 8830 Description 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 680R 5% T&R RES 1/4W 1K 5% .2"U T&R RES 1/4W 1K 5%MINI T&R RES 1/4W 1K2 5% T&R RES 1/4W 1K5 5%MINI T&R RES 1/4W 1K54 1% T&T 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 5.0W 3K6 5% BLK RES 1.0W 4K7 5% T&R RES 1/4W 4K7 5% .2"U T&R RES 1/4W 4K7 5%MINI T&R RES 1/4W 7K5 5% T&R RES 1/4W 8K2 5%MINI T&R RES 1/4W 9K760 0.1% *** 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 14K7 1% T&R RES 1/2W 15K 5% 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 20K0 1%MINI MF T&R RES 1/4W 21K5 1% T&R RES 1/2W 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 33K 5%MINI 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 78K7 1% T&R RES 1/4W 82K 5%MINI T&R RES 1/4W 91K 5% 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 1/4W 200K 5% T&R RES 2.0W 220K 5%10MM BODY 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 STAR RING TERMINAL14-16AWG #10SCREW 21" 14C-28AWG DIP HDR CABLE .05" RELAY 1C 02AMP DC48 006MA PC-S RELAY 1A 16AMP DC48 011MA PC-C #4 X 1/4 PAN PH TYPE A ZINC 4-40 X 5/16 PAN PH MS JS500 #4 X 3/8 FLAT QUAD TYPE A JS500 BLK 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 X 1/4 PAN PH TYPE B JS500 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 Qty. 2 2 2 9 2 2 1 1 15 1 6 4 4 2 2 6 2 2 8 2 1 17 5 2 8 2 2 9 12 4 2 2 12 2 2 4 2 8 1 6 3 1 2 9 8 2 2 2 4 2 2 2 1 2 10 2 1 1 2 2 4 4 1 1 1 2 2 4 2 8 3 12 4 2 4 4 24 64 2 2 YS # 8869 8999 8719 8815 8809 8749 8731 8740 3570 8663 8629 3751 3743 3851 3859 8657 8921 8667 3517 8818 3511 8485 8850 3502 3436 3587 3705 3682 3035 3036 3037 CH1197 8379 Description 8-18 X 1/2 THRD CUTTING FOR PLASTIC 8-32 X 5/8 PAN PH TAPTITE JS500 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 10-16 X 5/8 TYPE B HEX W/SLOT JS500 5/16-18 X 3 GRD 5 HEX BOLT JS500 14 PIN SCKT CLOSED FRAME DIP ONLY 11/64 NYLON SPACER (MICRO PLASTIC) 10-32 X 1/4 SPACER PHENOLIC SNAP IN 5/16 SPACER RICHCO SNAP ON 0.5" SPACER RICHCO 1/2 PCB PLASTIC SPACER 1/2 PLASTIC HEX SPACER #4 6-32 X 3/8" HEX SPACER ALUMINUM #3MM ID3.2MM OD7.0MM THICK 5MM SHOULDER WASHER SWS-229 LENGTH 1/8 NYLON WASHER #8 0.062 3/4 OD X 3/8 ID X .080 THICK WASHER #6 FLAT WASHER NYLON #6 SPLIT WASHER ZINC #10 INT TOOTH LOCKWASHER BO NYLON FLAT WASHER OD.158ID.110H.070 DPDT PUSH SW PCMT H BREAK B4 MAKE DPDT ROKR SW QUIK 250"AC/PWR ON-OFF 4P3T SLID SW PCMT H 250 MALE PCB TAB REEL PATCH 08 22AWG 05.0 XH PATCH 08 22AWG 09.0 XH PATCH 12 22AWG 15.0 XH AP4040 117VAC-IMPORT T'RD 1/4 X 6 X 2.3 10PP1 FILTER FOAM Qty. 4 17 2 5 5 13 12 1 1 66 16 3 5 4 2 2 4 4 4 2 2 4 4 2 3 1 1 36 1 1 1 1 1

Yorkville Sound · http://www.yorkville.com

SERVICE MANUAL

Yorkville Sound · http://www.yorkville.com

SERVICE MANUAL

Yorkville AP4040 Power Amplifier M1129 "THE INPUT BOARD"
The input board processes the audio signal from the input jacks to the volume control board, (M1128). Each channel consists of a balanced gain stage, switchable subsonic filter, and a stereo / mono / bridge switch. Looking at the left channel, the balanced input, (XLR Jack) and unbalanced input (phone jack) are wired in parallel to the input of a balanced operational amplifier, (U4). The gain of this stage is 0.82 (-1.3dB) balanced and 1.6 (4.0dB) unbalanced. Resistors R25, R27 along with capacitors C11 and C12 form a radio interference elimination filter. Switch S1 selects the cutoff frequency of the hi-pass subsonic filter. The subsonic filter provides a 20Hz or 40 Hz high pass filter. The filter consists of a tee network on the input of U3 along with R10, R28, C29 and C30, C33 and C34. The gain is 1 (0dB) in the passband, (above 100Hz). The audio signals from the input board M1129 pass through the 14 conductor cable to board M1128.

The activity LED circuit consists of Q1 and the surrounding circuitry. The audio signal enters the activity LED circuit through R2. R2 and C21 form a differentiator that turns Q1 on illuminating the activity LED whenever the audio signal increases in amplitude. A constant current flows through R55A, R55B and when Q1 is off, the collector current then flows through D1. From M1128 the audio signal passes through a 12-conductor ribbon cable to circuit board M1147. On M1127 an operational amplifier U201 re-references the ground for the audio signal from LREF or RREF to the corresponding LOG (left output ground) or ROG (right output ground). U201 also provides DC correction for DC offsets appearing on the output binding posts. Feedback from the output binding posts appears on LFNB or RFNB. Through R203A or R203B the DC offset achieves a gain of -1 from U201. The DC offset of opposite polarity on the output of U201 will compensate for the DC offset in the amplifier section on M1146 resulting in 0 volts DC on the output binding posts. · The audio signal continues to M1146 via an 8-conductor ribbon cable.

M1126 "THE VOLTAGE AMPLIFIER AND CURRENT AMPLIFIER"
This board contains: · a voltage amplifier section · a current amplifier section · amplifier current limit section · DC output protection · heatsink temperature sensing Voltage Amplifier Section The voltage amplifier amplifies the audio signal's voltage from 6.8 volts peak (at the output of U201) to approximately 98v peak, which is required to drive the current amplifier section. The current amplifier provides the current required for the 98v peak signal to drive 1200 watts into 4 ohms out of the binding posts.
Before the circuit is described in detail here is a quick rundown on the signal's path through the voltage amplifier stage. Refer to the schematic of M1146. Let's consider that a positive going AC signal is present at the SIG input. The positive going signal will turn on the positive side of the voltage amplifier. The signal at the SIG input turns on Q12A (through R40A, D14A and D13A). The collector of Q12A pulls down on the base of Q14A turns this transistor on further and allows a greater current to flow out of Q14A's collector. This increase in current passes through Q15A and it's collector to emitter voltage decreases. The collector of Q15A now being more positive in voltage turns the base of Q18A on causing an increase in Q18A's collector current resulting in test point 1 going positive. As the positive side of the amplifier was turning on the negative side would have been turning off. This is how test point 1 was able to move positive following the input signal. The reverse would hold true if a negative going signal were present on the input of the voltage amplifier.

M1128 "VOLUME CONTROL BOARD"
This board contains: · the front panel audio gain controls · the front panel indicating LED's (power, protect, activity and clip). · the audio limiters Circuit Explanation: · The left channel of the circuit is explained. (Refer to the schematic of M1128 as the sections of the circuit are explained.) The audio signal out of M1129 passes through volume control P2 and the desired level enters U2 through pin 6. U2 is set for a gain of 5 (14dB) when the volume control is in the fully clockwise position.
The AP4040's defeatable limiter is built around LD8. LD8 is an opto-resistive cell comprising of an LED that shines on a photocell. As the LED in the LD8 becomes brighter, the resistance of the photocell decreases, placing more of the audio signal on pin 5 (non-inverting input) of U2. This audio voltage gets subtracted from the signal on the inverting input and less signal appears on the output of U2. Transistors Q5 and Q6 along with the surrounding passive parts provide the attack and release time constants of the limiting function along with the drive currents for the clip LED and the LED inside LD8. When an audio signal on the output of the power amplifier section (on board M1146) enters clipping, pulses representing the duration of the clipped portion appear at LCLIP. These pulses turn on transistor Q6, and Q6 provides current pulses to turn on clip LED LD6. The pulses also pass through R7 and D6 to charge C3 and C36. When the voltage across C3 reaches 0.5 volts then Q5 turns on providing a current into the LED of the LD8 limiting the audio signal at U2. The charging (attack) and discharging (release) times of the limiter are 80mS and 3.5 seconds respectively. Resistors R50 and R7 provide the charging path, and resistor R51 provides the discharge path. The limiter can be defeated by placing the limiter switch (S2) in the in position which disconnects Q5 and the charging / discharging circuitry from V+.

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CIRCUIT DESCRIPTION: The voltage amplifier is a mirrored image with circuitry connected to the positive power supply rail being identical (but opposite polarity) to the circuitry connected to the negative power supply rail.
For this reason we will look in detail at the positive side of the amplifier. The audio signal enters the voltage amplifier at the SIG input. The signal passes through R40A, D14A and D13A to the base of Q12A. Diodes D13A and D14A set up the DC bias on Q12A to approximately 0.6 mA. The first voltage gain stage consists of Q12A along with the resistor chain on its collector and the emitter resistor (R44A). Transistor Q12A drives the base of Q14A through the resistor chain. A DC current of approximately 4 mA should flow through the collector of Q14A. The voltage drop across Q14A remains constant and is derived from the voltage drop across the voltage reference Q20A, resistor R58A, and the base/emitter junction of Q15A. This total voltage should equal approximately 3 VDC. Transistor Q14A is the second gain stage and its output current flows through Q15A. Transistor Q15A is a common base stage with the collector driving the base of output buffer Q18A. Diode D17A is a clamping diode that prevents the maximum peak of the audio signal from coming within 4V of the 144 VDC rail. This is to prevent the output current amplifier from going into saturation during clipping and therefore having storage delay problems. Transistor Q18A buffers the high impedance present on the collector of Q15A. The output of the buffer provides a low output impedance at the junction of R61A and R62A and is current limited to 30mA through the clamping action of D19A, D20A and D23A. The signal at the junction of R61A and R62A drives the succeeding current amplifier.

Current Amplifier Section The current amplifier receives a high voltage audio signal from the voltage amplifier and provides the current drive necessary to drive speaker cabinets.
The current amplifier is a two-tier complimentary output driver design controlled by a complimentary darlington stage.

[CIRCUIT DESCRIPTION - REFER TO THE SIMPLIFIED SCHEMATIC #1 ON THE FOLLOWING PAGE]

QUIESCENT CONDITION: This design is class A/B and therefore the output driver transistors must be forward biased to provide low crossover distortion. In most class A/B designs, a diode chain or VBE multiplier is used to control the bias voltage and provide a means of adjusting the bias. This design is different, as there isn't a diode chain or VBE multiplier. For simplicity lets consider only the positive side of the current amplifier, that is all parts between the positive power supply rails and the audio signal output/input terminals. The negative side is the same as the positive, except for polarity changes.
To bias Q14, greater than 0.5V is needed from base to emitter, (or for simplicity from base to amplifier output). Points A and B are at the same potential, so consider them to be connected. If this is true then 0.5V from test point 2 to the amplifier output must appear across R12. There must be some way of developing this voltage across R12, and there is using the darington (Q5 and Q40) driver along with local feedback. Simplified schematic #1 shows the biasing circuit. The current needed to develop 0.5V across R12 comes from the emitter of Q5. When the amplifier is first turned on the current source (Q3) turns on Q5 and Q40) and current flows through R12 developing a voltage. When this voltage approaches 0.5V Q1 turns on and robs current from the base of Q40.

550 Granite Court, Pickering, Ontartio CANADA L1W-3Y8

550 Granite Court, Pickering, Ontartio CANADA L1W-3Y8 4625 Witmer Industrial Estate, Niagara Falls, New York USA 14305

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4625 Witmer Industrial Estate, Niagara Falls, New York USA 14305

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Yorkville Sound · http://www.yorkville.com

SERVICE MANUAL

Yorkville Sound · http://www.yorkville.com

SERVICE MANUAL

This causes Q40 to turn off until the reduced current flowing through Q5 maintains 0.5V across R12. Q1 will turn off slightly causing Q5 and Q40 to increase their collector currents. The circuit reaches a point of equilibrium with approximately 0.5V across R12. Because all output devices are not identical and base emitter voltages vary, some adjustment must be available to slightly adjust the 0.5V across R12. This is accomplished with RT1. RT1 causes Q1 to turn on slightly more or less resulting in Q5 and Q40 turning on slightly more or less and therefore R12' s voltage will be slightly more or less than 0.5v. The proper quiescent current voltage is 4mV (to be measured between test points 8 and 9).

amount of time was spent on the current limit circuitry so that it may simulate the safe operating area of the output transistors (SOAR curve). No matter how reactive the load may be the phase shift that it presents, along with it's resistive component is used to set the output current limit of the output transistor stage. Refer to the schematic of board M1146 while reading the following text. The current limit circuitry is a mirrored image with circuitry connected to the positive power supply rail being identical (but opposite polarity) to the circuitry connected to the negative power supply rail. For this reason we will look at the positive side of the circuitry. Transistor Q9 measures the peak current flowing through resistor R53. The voltage across R53 (as a result of the current flowing through it) is scaled down by R55, R35, R35A, R36, R37, D7 and D11 these parts make up the safe operating area along with the time constants of C30, R34, C12 and R26. Fig. #3 shows a waveform of the current that passes through R52 and R53 when the output of the amplifier is shorted to ground. This can only be seen by using an oscilloscope to measure differentially across R52 and R53. The conditions of the measurement are contained on the diagram. During current limit when Q9 turns on it reduces the voltage across R42. R42 is in series with a 16 volt zener (ZD7) and is also in parallel with the junction of Q8. The current that flows through R20, ZD7, R42, and R22 normally saturates Q8. When Q9 reduces the voltage across ZD9 and R42 to below 16.6 volts, Q8 turns off allowing a charge to build up on C8 through resistors R24 and R25. If current limiting occurs for a long enough duration to allow C8 to charge to 1.2 volts then Q7 will turn on tripping the relay circuit on board M1147. As soon as the relay is tripped the audio signal will be turned off at the output of the voltage amplifiers and will remain off for about 5 seconds before the relay turns on and allows the audio signal to pass through the amplifier. If a current limit condition is still present then the whole cycle will occur again and repeat until the load conditions on the amplifier's output are safe for the amplifier. When a safe load appears the amplifier will automatically reset and drive that load (the speaker cabinet).

The Second Tier and Tier Switching Refer to the simplified schematic Fig. #1 while reading the following text. One way of making an amplifier more efficient is to vary the Power Supply Voltage on the collectors of the output transistors (Q14 & Q22). The lower the voltage from collector to emitter, the lower the device dissipation. During quiescent conditions, there is 55VDC on the collectors of output transistors Q14 and Q22. The peak AC voltage that can appear on the amplifier's output is approximately 139V peak. How can an output transistor deliver a 139V peak when its collector is only at 78VDC? It can if its collector is pulled up to 144VDC as the output signal's peak rises above 78VDC. Refer to Fig. #2. The second tier voltage must remain above the amplifier's output voltage by amount Vm. Therefore the circuitry controlling the second tier voltage must increase the tier voltage before the amplifier's output voltage reaches 78VDC. This leading voltage is necessary to compensate for time lag of the second tier circuit during fast rising amplifier output signals.
The voltage between the amplifier's output and test point 4 is approximately 12VDC derived from the voltage drop across ZD4. We call this voltage the "floating battery" because it floats on top of the output audio signal with test point 4 always being 12VDC greater than the peak of the output signal. Test point 4 drives the gate of mos-fet Q11. Q11 controls the transistors of the upper tier. As Q11 turns on its source forward biases the base of Q13 and Q13 pulls the collector of Q14 towards the 100 volt rail. The gate to source voltage needed to turn on Q11 is approximately 3.5 volts. When the peak output signal is about 69.5vp (78v-(12v-3.5v)) then Q11 will start to turn on the second tier. The second tier voltage will remain about 13 volts (Vm) above the peak of the output signal to the point of clipping where this voltage is reduced to about 6 volts (measured driving an 8 ohm load). Zener ZD8 protects the gate source junction of Q11 and also provides a supply current path through R29 for the "floating battery".

DC Protection If a DC voltage greater than 8 volts appears on the output of the amplifier for more than 200 milliseconds then triac Q30 will turn on holding the output at ground potential. MBS4992 is a device that turns on at either + or - 8 volts DC.

NOTE: The Power supply voltages given are those when the amplifier is not driving a speaker load. This will allow yo to check the tier switching with the cover of the amplifier off and the amplifier, therefore, running cool. Current Limit Protection Circuitry To have an amplifier drive 3000 watts into practically any combination of speaker cabinets and know what is a safe load and what is not is a very difficult task. An extensive

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4625 Witmer Industrial Estate, Niagara Falls, New York USA 14305

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SERVICE MANUAL

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SERVICE MANUAL

NOTE: Every time you replace blown output transistors on a M1146 board test the DC protection triac with the following circuit. Conditions of test:
A) Pass a 100Hz 25v peak signal through the M1126 board under test with no load connected to the amplifier output. B) Connect points 1 and 2 as shown in the diagram. The amplifier should go into protect mode as the triac (if working) shorted the output of the amplifier to ground, and the amplifier goes into current limit. C) Disconnect the triac test circuit and allow the amplifier to complete it's protect cycle. D) Reverse connections 1 to 2 and 2 to 1 and test again. The same results as in B) should be observed if the triac is working.

If prolonged current limiting occurs on the amplifier's output transistors then D204 or D205 (depending on which channel is current limiting) will be forward biased turning on Q202 (from its off state). Now +144VDC appears on the collector of Q202 and through R210 and R211 turn on Q203 therefore turning off Q201 by shorting its base emitter junction. Q201 turning off will turn the relay off and the normally closed contacts (off state) will short the outputs of the voltage amplifiers to ground so as not to continuously stress the amplifier's output transistors. A cycle now occurs. With the voltage amplifiers now disabled there is no signal driving the output transistors (Q13 to Q28). The current limit circuit protecting the output transistors (Q13 to Q28) turns off and D204 and/or D205 are not forward biased and Q202 turns off. Through Q203 and Q201 the relay is turned back on and the voltage amplifiers are now active again, driving the output transistors. If current limiting still occurs, then the same cycle will occur. If the cause of current limiting (low impedance or short on the speaker output terminals) has been removed, then the amplifier will continue to operate normally. The third operation that the relay provides is "overheat shutdown". If for some reason the fan cannot keep the heatsinks in a safe operating temperature area then the fan control circuit (on board M1147) will deliver through D207 a positive current to turn Q203 on and turn Q201 off to turn off the relay and disable the voltage amplifiers. When the fan has cooled down the temperature of the amplifier, then the signal through D207 will disappear and the relay circuit will turn on the relay to resume normal operation. Anytime the relay is in the "protect" mode (due to the abnormal states) then contact pin 4 of the relay will illuminate LD3 (the protect LED on the front panel).

Only test the triac for one protect cycle as prolonged testing will heat the triac to a high temperature.

Soft Turn On Circuit To reduce the "inrush" current that flows through the line cord from the 120 VAC power source (typical with large linear power supplies), a circuit provides a soft turn on function. When the power switch is turned on, the current that initially flows through the primary of the transformer must flow through SG201 and SG202. These are surgestors that reduce the peak inrush current flow. After about 500 milliseconds a relay's contacts short across the surgestors so that they are not stressed by the current flowing through them under normal operation. A circuit consisting of Q240, Q241, C215, and the associated resistors provides the time delay for the turn on cycle of the relay. The circuit is very similar to the shutdown time delay circuit. Refer to the section on the shutdown circuit for a circuit description.

M1147 SHUTDOWN CIRCUIT, FAN CONTROL CIRCUIT, and SOFT TURN ON CIRCUIT:
· The shutdown relay and its associated drive circuitry have two possible operating states. · Amplifier on under normal operating conditions. · Amplifier power switch has just been turned OFF/ON, or the amplifier is in current limit protecting the amplifier's output transistors, or the amplifier has overheated. Shutdown Circuit Here is how the circuit accomplishes these functions. The relay's normally closed contacts short the output of the voltage amplifiers to ground when the power switch is off. When the power switch is turned on, the relay remains off (normally closed) for about 6 seconds. C203 charges to 35V and results in Q203 turning off allowing Q201 to turn on. As Q201 turns on, it connects the negative terminal of the relay's coil (Pin 16) to ground energizing the relay and opening the normally closed contacts.

Fan Circuit Looking at the schematic to board M1147, here is a quick explanation of the fan control circuit. There is a temperature sensor (AS35) on each M1146 board. When the amplifier is first turned on, Q207 and Q208 are off. The AS35 temperature sensors are configured as temperature controlled current sources. As either temperature sensor begins to heat up, more current flows through D212 or D218 increasing the voltage drop across R235 or R236. The hotter temperature sensor will provide more current than the cooler sensor and therefore develop a higher voltage across it's associated 8K2 resistor. The higher voltage will forward bias D212 or D218 reverse biasing the cooler temperature sensor's diode so that the hotter sensor will control the fan speed. At 40 degrees C there

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SERVICE MANUAL

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SERVICE MANUAL

is 10 volts across R235 or R236 which is enough to turn on Q210, Q208, and Q207 providing 7 DC volts to the fan. Further heating the temperature sensors results in a larger DC voltage across the fan. To lower the dissipation of Q207, D215, D216, ZD205, ZD206 and R226 turn off Q207 and Q208 when the full wave rectified voltage present of the collector of Q207 reaches approximately 58V by robbing current from the base of Q208. The maximum fan voltage is 20.5 VDC. ZD207 and R228, R229 and R230 provide a current limiting function. Figure #4 shows the current through these resistors when there is 12VDC across the fan.

Thermal Shutdown Circuit The emitter of Q210 in the fan circuit is the measuring point for the shutdown voltage. As the temperature sensing devices (AS35) that control the fan circuit heat up the voltage on the emitter of Q210 rises until at 85 degrees Celsius on the M1146 heatsinks. The voltage on the emitter of Q210 reaches 18 (85 degrees C) VDC and the amplifier must be shutdown to protect the output power transistors. ZD202 and D207 become forward biased and Q203 turns on turning the relay off and muting the audio signal. After the amplifier cools down the voltage will decrease until Q37 turns off turning the relay back on enabling the amplifier.

SPECIFICATIONS
Frequency Response: Hum and Noise: THD (1 khz, 4­Ohms): THD(20Hz ­ 20kHz, 4­Ohms): High Pass Filter: Slew Rate: Damping Factor: Crosstalk: Input Impedance: Input Sensitivity: Rejection: Controls: Displays: Input Connectors: Output Connectors: Turn On/Off transients: Power Consumption: Transformer: Protection: Cooling: Size: +/- 1dB, 20 Hz to 20 KHz -103 dB below max output RMS voltage, unweighted <0.01% <0.1% 40Hz, 12 dB/octave Power amp section: 25 V/uS, 50 V/uS in bridged mode > 600, 20 Hz - 20 KHz, into 8 ohms -75 dB below full output at 1khz, -60 dB below full output (20 Hz - 20 KHz) 20 KOhms balanced, 10 KOhms unbalanced 1.4 VRMS sine wave (AP4020: 36 dB, AP4040: 39 dB gain) CMRR@60Hz: minimum 48dB, typical 56dB Rotary GAIN controls, MONO/STEREO/BRIDGE, FILTER and LIMITER switches 2x CLIP, 2x ACTIVITY, PROTECT, POWER ON (LEDS) 2x XLR, 2x 1/4" phone (TRS) 2x Binding Post, 3x SpeakonTM SP-4 < 15 milliwatt / seconds, 0.5 Wpk. (1s on delay) Typ 1130, Max 1800 Watts Toroidal Fully protected: DC, LOAD and THERMAL Aluminum Heatsinks with DC servo­controlled fan (in front, out rear) (DWH) 44 cm x 48 cm x 9 cm (front panel to binding posts) (DWH) 17.5 in x 19 in x 3.5 in Two rack spaces 43.5 pounds, 19.8 Kilograms

Identifying Defective Boards in the AP4040
STEP 1: VISUAL INSPECTION OF FRONT PANEL AND FAN · Check to see whether the green power LED is lit. If not, the amplifier has a power supply (M1147 board), transformer, A.C. switch or line cord problem. · If the red protect LED stays on or samples off and on, this usually indicates a problem with the voltage amplifier or current amplifier sections on one or both of the M1126 boards. Check for misaligned pin connections or see if the ribbon cables have been cut or pinched through their insulation. · If the fan is running at full speed at power up this usually indicates a problem with the fan circuitry on the M1147 board, but it can also be caused by M1146 circuit problems. A damaged AS35 temperature sensor located under the M1146 heatsinks can cause erratic fan behavior. · No output on either or both channels could be caused by intermittent push switches on the input board. STEP 2: VISUAL INSPECTION OF INTERNAL CHASSIS AND INITIAL TESTING After removing the lid, look for any signs of smoke, charring or burnt components. Before powering up replace the burnt components, and check the associated circuitry for damaged parts. Disconnect one M1127 board and test one board at a time to reduce the possibility of further damage. Use a variac to slowly increase the 120 VAC up from 0 volts while monitoring the quiescent current with a meter and the speaker output with an oscilloscope. Watch the speaker output for large DC offsets, or oscillation. Watch the meter for large collector currents flowing. Remember under quiescent conditions, there should only be 3 to 5 millivolts across test points 8 and 9 on the output stage of the amplifier.

Weight:

550 Granite Court, Pickering, Ontartio CANADA L1W-3Y8

550 Granite Court, Pickering, Ontartio CANADA L1W-3Y8 4625 Witmer Industrial Estate, Niagara Falls, New York USA 14305

5

4625 Witmer Industrial Estate, Niagara Falls, New York USA 14305

5

SERVICE BULLETIN
AP4020 & AP4040

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.

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 +5% 3K41

3K25

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

U.S.A.

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

REAL Gear. REAL People.

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

U.S.A.

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

www.yorkville.com

www.yorkville.com

Yorkville Sound
550 Granite Court Pickering, Ontario L1W-3Y8 CANADA

Yorkville Sound Inc.
4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA

Yorkville Sound
550 Granite Court Pickering, Ontario L1W-3Y8 CANADA

Yorkville Sound Inc.
4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA

1

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.

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.

TEST POINTS R10

LAYOUT REFERENCE 4K7

CORRECT MEASURED VALUE
-10% +10% 15ohm 17ohm 19ohm

LAYOUT REFERENCE 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 TO­3 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 CORRECT POSITION AND THAT ALL COMPONENTS ARE SOLDERED.

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

REAL Gear. REAL People.

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

U.S.A.

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

www.yorkville.com

www.yorkville.com

Yorkville Sound
550 Granite Court Pickering, Ontario L1W-3Y8 CANADA

Yorkville Sound Inc.
4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA

Yorkville Sound
550 Granite Court Pickering, Ontario L1W-3Y8 CANADA

Yorkville Sound Inc.
4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA

2

2

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R49 1/4W 15K

R52 1/4W 1K

R4 1/4W 470K

R48 1/4W 10K

BC560C 1/4W R7 1/4W 4K7
MINI

.

2

R47 1/4W

R50 1/4W 15K
.

4148 TO92

Q5 5102 4K7 1/4W R18 . 15K 1/4W R19
MINI

R16 22M
.

47K 1/4W R28 249R 1/8W R24
FLMP .

MINI

MPSA63 63V 220N C22 TO92 R36 1/4W 8M2
MINI

0W5 1N5225B

* NOTE: M1128 - FOR R34 NAD R47 USE #4821 470R M1133 - FOR R34 AND R47 USE #4808 2K

D6

C2 220P

D3 3V0

MINI

63V

100V

C9 470N

.

C3 470N

0W5 D2 4V7 1N750ARL

C36 4U7

Q6 5102

MINI

R53 1/4W 620R

R51 1/4W 62K

MINI

MINI

BC560C TO92

63V

63V

1

1

2

Q2 5106

*

3604

LD6 {Function}

W2
R43 1/4W 82K 10K AUD 4390 P2 M Function
MINI

LM13600N U4:B

249R 1/8W R21

FLMP

15K 1/4W R26

5906 RED

.

LD3 {Function}

249R 1/8W R22

5906 RED

5908 GRN

FLMP

LD2 {Function}

3

4K7 1/4W R17 . 15K 1/4W R20

MINI

1/4W

LM13600N U4:A R15 22M
.

249R 1/8W R23

FLMP

15K 1/4W R25 47K 1/4W R27
MINI

R1 1/4W 100K
.

3

1 LD4 {Function} 5908 GRN 2 3 4 5

12 W1:A 12 W1:B R55A 1/4W 220R 12 W1:C 12 W1:D 12 W1:E 12 W1:F 12 W1:G 12 W1:H 12 W1:I 12 W1:J
5

4

C41 100P

100V

C17 47P

100V

.

4

C26 33U

16V

R45 1/4W 14K7
.

R35 1/4W 78K7
.

R136 1/4W 1K2

6 7

MC33078P R44 1/4W 1K
MINI

.

8 9

U2:B C38 220P 100V

10 11 12

5

12 W1:K 12 W1:L R55B 1/4W 220R
.

63V

R31 1/4W 62K

C35 4U7

R29 1/4W 620R

MINI

MINI

6

.

MINI

4148 TO92

Q4 5102

1/4W

7

0W5 1N5225B

R34 1/4W

*

4K7 1/4W R54 . 15K 1/4W R59

MINI

.

C B E TO-92

EBC TO-92
LD5 {Function}

8

5906 RED

4K7 1/4W R63 . 15K 1/4W R38

MINI

1/4W

.

249R 1/8W R61 LM13600N U3:A 249R 1/8W R60
FLMP

15K 1/4W R55

.

C1 220P

FLMP

100V

LM13600N U3:B R65 22M

249R 1/8W R37

FLMP

47K 1/4W R64

MINI

R3 1/4W 470K

MINI

249R 1/8W R58

FLMP

100K 1/4W R2

C21 220N

63V TO92

Q1 5105

D1 3V0

BC550C BC560C

2N5401 2N5551 MPSA06 MPSA13 MPSA43 MPSA56 MPSA63

BC560C TO92 R32 1/4W 15K Q3 5102 R33 1/4W 10K C10 470N

LD1 {Function}

63V

5908 GRN

6

C4 470N

63V

R30 1/4W 1K

MINI

.

BC560C R57 22M 47K 1/4W R56
. MINI

R5 1/4W 8M2

.

MINI

R39 1/4W 15K

R8 1/4W 4K7

D9

MPSA13
.

7

15K 1/4W R62

8

MINI

V+

8

R46 1/4W 82K

C40 100P

100V

C18 47P

(VCC)

(VCC)

100V 100N C5 63V 100N C7 63V

U3:E

9

P1 M Function

.

.

4

C25 33U

16V

V-

10K AUD 4390

U4:E

6840_PC

U2:C R40 1/4W 14K7 R42 1/4W 78K7

LM13600N U3:D 6745 Dual VCA {Function}

LM13600N U4:C 6745 Dual VCA {Function}

9

(VCC)

(VCC)

R41 1/4W 1K
MINI

MC33078P C37 220P 100N C6 63V 100N C8 63V

LM13600N U3:C 6745 Dual VCA {Function}

LM13600N U4:D 6745 Dual VCA {Function}

10

100V

U2:A

10

Product 6745_PC
11

AP-VX-VTC POT PCB
PCB# X8011 Sheet 1 of 1
11 O P Q

POT PCB

Rev:8V00 Date: Fri May 29, 2009 Filename: X8011V800sch.sch2002
A B C D E F G H I J K L M N

M1128 AP-VX
LREF RREF RSIG ACT RREF LREF LCLP X24 PRTCT X12 VV+
6

X14

1

R8

RSPRE

LSPRE

C1 R47 220P 3V0 220N C21 5906 RED L Clip Q1 R17
+ -

C9

470N R5

470R X8

100K D1

X10 D9

470N

4K7

R7

R2

X15

4K7

15K

R50

C10

Q3

15K 10K 470R

R32 R33 R34

220P 8M2 R56 R36 R37 X23 Q2 LD5 C22
5906
-

Protect

470N

MPSA13

5906

X11

62K

RED
+

L Activity

Power

LD4 GRN
+

5908

63V 4U7

R63 5908

4K7

5908

BC560C

R53 63V 4U7 C36 C6 R51 C3

620R 1K 62K 470N 100N R18

R25

220P 1K R41 R55 15K

4K7

15K

22M

C26 LM13600N R23 249R R24 249R U4 R28 47K X18 15K C18 47P R42 78K7

15K U3

LM13600N 15K

100N

R22 LD1 249R R21 249R R52 R26 R27 47K 15K R20 15K R15

220R 10K 16V 33U

AUD

LD2

78K7 R35 47P C17 X16 U2

100P C41 Q4 R44 BC560C 1K 220P C38
MC33078P

C5
SHORT AXIS

C37 82K 100P C40 14K7 R46 R40 22M

249R
R38

R60

22M R16

R65

249R R61

CLINCH ORIGIN INSERT ORIGIN

R19

47K R64

VCD

LONG AXIS

StepAndRepeat - [email protected]@3.300

SEE LAYOUT DOCUMENTATION

X20

100N

4K7

-

-

D6

4148

P2

R59 R54 4K7 22M 249R 47K 249R

Q5

X22

GRN

+

+

R136 1K2

LD6 GRN

220N

Channel A

R30 1K 4V7

REDLD3
+ -

3V0

R29R31 D3

8M2

4148 D2

R4

470K

C2 Channel B

RSIG LIMABLE RSPOST

X19

Q6 BC560C

10K

R48

15K

R39

BC560C

R49

15K

X4

To Power Supply Pcb

X9

X1

W2

2329

12

R1

100K

X13

21in 14C 3604

X21

470K R3

X6

620R C4 220R R55A C35 14K7 R45 82K R55B R43

MPSA63

R Clip R Activity

R57

P1
AUD

10K

R58

C25 16V 33U C7 C8 100N

R62

15K

M1133-VTC

W1

BlankSize - 14000x11000

M1128 M1133

VV+

X17

AP-VX VTC

LSPOST

BRPRTCT

RCLP LVGND

LSPOST

X8011 V800 M1128-AP-VX

-

SEE LAYOUT DIAGRAM X8011 PRODUCTION NOTES - M1128 AP/VX
1. P22 POT

PCB 3511 WASHER 8870 SCREW 2. 0.4" LED SPACER PT#3739

SEE LAYOUT DIAGRAM

X8011 PCB_DATABASE_HISTORY MODEL(S):# 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 13 DATE OCT/97 APR/17/98 . DEC/09/98 . NOV/20/01 JUL/09/02 OCT/25/02 APR/15/05 JUN/05/06 . . . . JUN/23/08 28-MAY-2009 . . D D D D D D D D AP4020 AND AP4040/VX2400 AND VX2402/V42 AND V44 VER# DESCRIPTION OF CHANGE 1.00 FIRST PRODUCTION 2.00 #5664 RIBBON CABLE CONNECTIONS CHANGED FOR . PROTECT CIRCUIT 3.00 PC#5736 TRACES CHANGED POT SUPPORT SCREWS . ADDED 3.10 PC#6466 LD7,LD8 NSL28AA->NSL32SR2 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 . REPLACE R4 WITH #6127 470K 1/4W 7.00 Removed shear, solder update, std board size 8.00 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 V N V N V N V N V N V N V N V N MODEL(S):# 1 2 3 4 5 6 DATE D D D D D D

X8011 DRILL HISTORY AP4020 AND AP4040/VX2400 AND VX2402/V42 AND V44 VER# DESCRIPTION OF CHANGE V N V N N V N V V N N V X8011 PENDING CHANGES AP4020 AND AP4040/VX2400 AND VX2402/V42 AND V44 PENDING CHANGE X X X X X X

LEAD/PIN REFERENCE
2N5401 2N5551 MPSA06 MPSA13 MPSA43 MPSA56 MPSA63

MODEL(S):# 1 2 3 4 5 6 PC# PC PC PC PC PC PC

BC550C BC560C

*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY C B E TO-92 EBC TO-92

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

1

1

4148

2

2

D7

U3:A MC33078P

C23 33U

16V

3

R28 1/4W 56K .

C9 220P 100V R27 1/4W 1K54 .
J1 LINE XLR

R22 1/4W 9K76 C12 C11 220P 100V 220P 100V
0.1%

R23 1/4W 9K76
0.1%

3

C34 68N 100V R10 1/4W 56K .

C33 68N 100V R109B 1/4W 4M7

FILTER SW

U4:A MC33078P C10 220P 100V R24 1/4W 9K76
0.1%

C30 150N 63V

C29 150N 63V R20 1/4W 120K .

S1:B
4

4

W1 3570

5

S2:B

0.1%

3436 LIMITER

R25 1/4W 1K54 .
J3 S R T -

R26 1/4W 9K76

LIMITER

5

MONO-STEREO-BRIDGED
3705 L
6

S3:A
M R L

3705 MONO-STEREO-BRIDGED COM M R
6

S3:B

COM

3705 MONO-STEREO-BRIDGED L
7

S3:C

3705 MONO-STEREO-BRIDGED L COM M R

S3:D

R111 1/4W 10R RAD R112 1/8W 10R .

MC33078P U1:B
7

COM

M

R

R37 10K0 .
1/4W

R38 10K0 .
1/4W

8

R6 1/4W 33K .

S2:A

8

9

R

T

J4

S

C6 220P 100V

R13 1/4W 1K54 .

R16 1/4W 9K76
0.1%

100V 220P C8 R15 1/4W 9K76
0.1%

C24 33U 4148 D4 MC33078P U3:B R9 1/4W 56K .

16V

9

MC33078P U1:A C31 68N 100V R19 1/4W 56K .

10

3657_OBS

C32 68N 100V R109A 1/4W 4M7

10

FILTER SW

J2

C5 220P 100V

100V 220P C7 R12 1/4W 9K76
0.1%

C27 150N 63V

C28 150N 63V

U4:B S1:A MC33078P
11

11

R11 1/4W 1K54 .

R14 1/4W 9K76
0.1%

R18 1/4W 120K .

C13 100N 100V

12

12

Tie-net Name

GND LIFT S4:A S4:B

Copper Tie Here

Copper Tie Here

C1 22N 275V C14 100N 100V

13

M1129 Database History AP2020 AP4020 AP4040 AM1CE VER# DESCRIPTION OF CHANGE # DATE 1.00 FIRST PRODUCTION 1 OCT/97 2.00 SWITCH NETS RREF WITH LREF AND RSPRE WITH 2 NOV/97 . LSPRE AT 14 PIN CONNECTOR. INPUT TO NONINVERTING 3 . CHANGE C27, C29, C28, C30 TO 150N . 4 DEC/02/97 PC#5694 PINS 10-12 OF MC2 CONNECTED TO BRG SWT 3.00 5 APR/16/98 ISOLATE PIN OF S3 4.00 6 JUL/01/98 4.10 PC#6436 REPLACE R119 (10K0) WITH JUMPER X119 7 SEP/06/01 5.00 PC#6873 REDO SOLDERMASK 8 APR/15/05 CONVERT TO PCAD2002, PC#6944:ROUTE GAUGE, 6.00 9 JUL/2005 PC#6914:ADD TARGETS 10 AUG-15-2005 . V N 11 D V N 12 D V N 13 D M1129.sch_schematic-DATABASE_HISTORY C16 100N 50V MODEL(S):# 1 2 3 4 5 6 7 8 9 10 11 12 13 DATE OCT/1997 NOV/12/97 DEC/02/97 APR/22/98 SEP/06/01 JUL/2005 D D D D D D D AP4020 / AP4040 / AP2020 / AM1CE VER# DESCRIPTION OF CHANGE 1.00 FIRST PRODUCTION 2.00 REVERSED INPUT POLARITY. MODIFIED FOR AP2020 . C27, C28, C29, C30 TO 150n 2.10 PC#5694 ADD NETS BRPRTCT, LVGND-28 TO BRG SW 2.20 DELETE R119 3.00 CONVERT TO PCAD2002 V N V N V N V N V N V N V N Product MODEL(S):-

13

C39 100N 100V

8

V+

V+

V-

V-

4

15

C15 100N 50V

4

4

V-

U1:C

U4:C

V+

14

8

8

14

U3:C

15

16

16

{Drawing Number}
PCB# M1129 Sheet 1 of 2
17

17

{Title}

Date: Tue May 02, 2006 Filename: M1129-6v00.sch2002
A B C D E F G H I J K L M N O P Q R S T U

Rev: v6.00
V

3705

S4

S2 S3
AL

S1 X50

W2 3417
X43
CL

BRIDGED - STEREO - MONO C1 275V 22N 6435 GND LIFT 10R W4 33K X42 X9 10R W3 C13 100N 100N C14 W1 FROM POTS
7

R6 C27

R109A 4M7 68N C32 R109B 4M7 150N R18 68N D4 120K 56K 56K

RT V

3436

R111

C24 C23 33U
16V

56K 56K R9

120K

X10
RSPOST LIMABLE RSIG

150N

X39
TP5

33U
LSPRE

16V

C31 68N

C29 C33

X41
RSPRE

R19 4148

U3 14 PIN SCKT
8 9 10 11 12 13 14

LSPOST

R20

R28

LREF

RREF

X13

R10

X38 V+ V-

X35

4148 D7

X31

X29

X26

X30

X28

X27

X25

X24

X23

X22

X37

X20

X19

150N

68N

X11 X12 X40
T P2

MC33078P

C34 C30

FILTER SW

LIMITER

R24

R38 TP3 R14 9K76 220P C7

10K0 10K0 R37
TP4
MC33078P

U4
MC33078P

AP2020 / AP4020 / AP4040
SLEEVE RING TIP

X36

M1129
X33

U1

R15 9K76 C5 C8 9K76 220P 100N 220P 220P C6 X17 J2 1K54 R13 X119

9K76 220P C10

X15
C15

X32 9K76 220P 100N 220P 220P R23 C9 C16 C12 C11 R25 1K54 1K54 R27

R12 9K76

X16 R22

R16

9K76

R11 1K54

RIGHT

LINE XLR J1

R26

9K76

100N C39

LINE_IN

X34 LINE_IN J4 J3 TIP-SW

SHORT AXIS

3657

3657

CLINCH ORIGIN INSERT ORIGIN

VCD

LONG AXIS

-

SL-SW

LOC

-

7

RING-SW

BEC
SLEEVE RING

LEFT

V6.00

X18

CC CM CR DL
1 2 3

AC AM AR BL

DC DM DR
4 5 TIP 6

BC BM BR

3436 C28 150N

3436

R112

TP1

7 RING-SW SL-SW

TIP-SW

M1129.sch_schematic-DATABASE_HISTORY MODEL(S):# 1 2 3 4 5 6 7 8 9 10 11 12 13 DATE OCT/1997 NOV/12/97 DEC/02/97 APR/22/98 SEP/06/01 JUL/2005 D D D D D D D AP4020 / AP4040 / AP2020 / AM1CE VER# DESCRIPTION OF CHANGE FIRST PRODUCTION 1.00 REVERSED INPUT POLARITY. MODIFIED FOR AP2020 2.00 . C27, C28, C29, C30 TO 150n PC#5694 ADD NETS BRPRTCT, LVGND-28 TO BRG SW 2.10 DELETE R119 2.20 3.00 CONVERT TO PCAD2002 N V N V V N V N V N V N V N MODEL(S):-

M1129 DRILL HISTORY AP2020/AP4020/AP4040/AM1CE # DATE VER# DESCRIPTION OF CHANGE 1 APR-03-2003 V06 N 2 AUG-15-2005 V07 CONVERT TO PCAD2002 3 D V N 4 D V N 5 D V N 6 D V N

M1129 Database History AP2020 AP4020 AP4040 AM1CE VER# DESCRIPTION OF CHANGE # DATE 1 OCT/97 1.00 FIRST PRODUCTION 2 NOV/97 2.00 SWITCH NETS RREF WITH LREF AND RSPRE WITH 3 . . LSPRE AT 14 PIN CONNECTOR. INPUT TO NONINVERTING 4 DEC/02/97 . CHANGE C27, C29, C28, C30 TO 150N 5 APR/16/98 3.00 PC#5694 PINS 10-12 OF MC2 CONNECTED TO BRG SWT 6 JUL/01/98 4.00 ISOLATE PIN OF S3 7 SEP/06/01 4.10 PC#6436 REPLACE R119 (10K0) WITH JUMPER X119 8 APR/15/05 5.00 PC#6873 REDO SOLDERMASK 9 JUL/2005 6.00 CONVERT TO PCAD2002, PC#6944:ROUTE GAUGE, 10 AUG-15-2005 . PC#6914:ADD TARGETS V 11 D N 12 D V N 13 D V N M1129 PENDING CHANGES MODEL(S):# 1 2 3 4 5 6 PC# PC PC PC PC PC PC AP2020/AP4020/AP4040/AM1CE PENDING CHANGE X X X X X X MODEL(S):-

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

*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

1

1

6 R89 1/4W 220K
MINI

6880 4N35

6880 4N35

U1:B 5 4

1 U1:A 2 R80 1/4W 220R
MINI

2

ZD10 4V7

0W5 1N750ARL

. BLK EY1 .

. RED EY2 . J1:A Function SPEAKON 4C 3628

2

4007 R30 1/4W 620R C9 4N7 250V R31 1/4W 39R
.

C10 2N2

400V 1_ D IRF630NPBF Q11 6752 TO220 Function

D30

1+ 2_ 2+ D21 MR854 MJ21196 Q19 6909 TO3 {Function} 3628 SPEAKON 4C Function J1:B
3

W1:H 8 W1:G
8

C30A 33U

16V

3

.

FUSIBLE

R57A 1/4W 151R

R67A 1/4W 10K

FUSIBLE

W1:F 8 W1:E 8
R49A 1/4W 2K

R59A 1/4W 10R

R29 5.0W 3K6
. FUSIBLE

MINI

G

N S

R72A 1/8W 33R

R5 1/4W 151R

FLMP

63V

BC550C Q20A 5101 BC560C R68A 1/4W 3K3 Q14A 5102 500V
MINI

200V R6 1/4W 10K0
MINI

C26A 4U7

FUSIBLE

R66A 1/4W 10R

470R 1/4W R87

160V

MINI

W1:C 8 W1:B 8

R205 1/4W 47K
MINI

TO92

330U C29A

4

R32 1/4W 39R0

C3 22U

.

FUSIBLE

W1:D 8

.

50V

220P C18

R29A 5.0W 3K6