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AP4040
1. Parts List 2. Pot Board · M1128 Schematic 1v1 · M1128 PCB layout 3v0 3. Input Board · M1129 Schematic 2v1 · M1129 PCB layout 4v0

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

4. Power Supply Board · M1147 Schematic 1v4 · M1147 PCB layout 4v0

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

5. Power Amp Module · M1146 Schematic1v3 · M1146 PCB layout 5v5 4. Service Kit · M1146

SERVICE MANUAL
Manual-Servive-ap4040-2v9.pdf v.2.9 6/2002

Quality and Innovation Since 1963
Printed in Canada

AP4040 Parts List 3/8/99

IMPORTANT SAFETY INSTRUCTIONS

INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS.

INSTRUCTIONS RELATIVES AU RISQUE DE FEU, CHOC ÉLECTRIQUE, OU BLESSURES AUX PERSONNES.

CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE.

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.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

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.

Veuillez lire le manuel:
Il contient des informations qui devraient êtres comprises avant l'opération de votre appareil. Conservez S.V.P. ces instructions pour consultations ultérieures

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

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

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

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

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.

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.

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

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

Service:
The unit should be serviced only by qualified service personnel.

Cordon d'alimentation:
Évitez d'endommager le cordon d'alimentation. N'UTILISEZ PAS L'APPAREIL si le cordon d'alimentation est endommagé.

Service:
Consultez un technicien qualifié pour l'entretien de votre appareil.
SAFE_V4.doc Version 4.0 02/11/99 11:54 AM

YS # 3570 5906 5908 6405 6408 6419 6425 6438 6825 6934 6439 6440 6461 6450 6822 6824 6432 6429 6465 6463 6433 5101 5102 5103 5108 5113 5114 6854 5105 5106 6814 6815 6873 6874 6752 6925 6900 6989 6990 6927 6840 5190 6444 6859 6880 6478 6489 5401 5410 5197 5412 5417 5201 5416 5273 5427 5209 6451 5834 5210 6435 5308 5226 5228 5314 5229 5231 5882 5255 5259 5281 5629 5945 5260 5961 5267 5619 5630 5618 5896

Description 14 PIN SCKT 641261/3 OR W3114T RED 3MM LED 1V9 20MA .4 SPACER T&R GRN 3MM LED 1V9 20MA .4 SPACER T&R RED 3MM LED 1V7 5MA BRIGHT PACE GREEN 3MM LED 1V9 5MA FROSTED BRIDGE 35A 400V WIRE LEAD GI3504 BAV21 200V 0A25 DIODE T&R 1N4004 400V 1A0 DIODE T&R 1N4148 75V 0A45 DIODE T&R MR854 400V 3A0 DIODE FAST RECOV 1N5225B 3V0 0W5 ZENER 5% T&R 1N750ARL 4V7 0W5 ZENER 5% T&R 1N5240BRL 10V0 0W5 ZENER 5% T&R 1N5242B 12V0 0W5 ZENER 5% T&R 1N4745A 16V0 1W0 ZENER 5% T&R 1N5246B 16V0 0W5 ZENER 5% T&R 1N5248B 18V0 0W5 ZENER 5% T&R 1N4747A 20V0 1W0 ZENER 5% T&R 1N5250B 20V0 0W5 ZENER 5% T&R 1N5251BRL 22V0 0W5 ZENER 5% T&R 1N5257B 33V0 0W5 ZENER 5% T&R BC550C TO92 NPN TRANS. T&R BC560C TO92 PNP TRANS. T&R MPSA06 TO92 NPN TRANS. T&R 2N5401 TO92 PNP TRANS. T&R MPSA42 TO92 NPN TRANS T&R MPSA92 TO92 PNP TRANS T&R 2N6517 TO92 NPN TRANS. MPSA13 TO92 NPN DARLINGTONT&R MPSA63 TO92 PNP DARLINGTONT&R MJF6668 221D- PNP DARLINGTON MJF6388 221D- NPN DARLINGTON MJE340 TO126 NPN TRANS MJE350 TO126 PNP TRANS. MTP10N15L TO220 N CHAN MOSFET MTP8P20 T220 P CHAN MOSFETT YS6900 (22) TO3 NPN TRANS. MJL1302A T03P PNP TRANS PWR MJL3281A T03P NPN TRANS PWR YS6927 (23) TO3 PNP TRANS. MC33078P IC DUAL OP AMP MBS4992 TO92 8V5 DIAC T&R MAC224-4 TO220 40A TRIAC 200V NSL-28AA OPTO-COUPLER 4N35 OPTO-COUPLER AS35FN-TO92 TEMPERATURE SENSOR 5R0 20% NTC THERMISTOR _10P 500V 5%CAP T&R RAD CER.2"NPO 100P 100V 10%CAP T&R BEAD NPO 220P 100V 2%CAP T&R RAD CER.2"NPO 220P 100V 10%CAP T&R BEAD NPO 330P 50V 10%CAP T&R BEAD NPO 470P 100V 5%CAP T&R RAD CER.2"NPO 470P 50V 10%CAP T&R BEAD NPO __1N5 200V 5%CAP T&R RAD CER.2"NPO __2N2 500V 10%CAP T&R RAD CER.2" YB __4N7 250V 5%CAP T&R RADIAL.2"FILM __4N7 250V 20%CAP AC Y ONLY RAD10MM _10N 250V 20%CAP RAD POLYFILM BULK _22N 100V 10%CAP T&R RADIAL.2"FILM _22N 275V 20%CAP AC X2 RAD BLK15MM _47N 50V 10%CAP T&R BEAD X7R _68N 100V 5%CAP T&R RADIAL.2"FILM 100N 100V 5%CAP T&R RADIAL.2"FILM 100N 50V 10%CAP T&R BEAD X7R 150N 63V 10%CAP T&R RADIAL.2"FILM 220N 63V 10%CAP T&R RADIAL.2"FILM 220N 250V 10%CAP RAD POLYFILM BULK __1U 63V 20%CAP T&R RADIAL ELE.2" __4U7 63V 20%CAP T&R RADIAL ELE.2" _10U 16V 20%CAP NONPOLAR T&R .2" _10U 160V 20%CAP RADIAL ELECT BULK _10U 63V 20%CAP T&R RADIAL ELECTR _22U 50V 20%CAP T&R RADIAL ELE.2" _33U 16V 20%CAP NONPOLAR T&R RAD 100U 25V 20%CAP T&R RADIAL ELE.2" 330U 100V 20%CAP RADIAL ELECT BULK 330U 25V 20%CAP RADIAL ELECT BULK 470U 25V 20%CAP RADIAL ELECT BULK 4700U 80V 20%CAP RADIAL ELECT BULK

Qty. YS # Description 1 4520 10K TRIM POT (ENCLOSED) 3 4390 _10K AUDIO DETENT STYLE"P22"16MM 3 2448 15.0 AMP CIRCUIT BREAKER 3 3410 RED ON LEFT DUAL BINDING POST TPP4 3 3415 RED ON RIGHT DUAL BINDING POST TPP4 2 3918 1/4" SLIM JACK PC MOUNT W/SCREW 4 3628 PC-MOUNT 250TAB SPEAKON #4SCREW GRY 17 3657 FEMALE XLR PC MOUNT HORIZONTAL 48 3860 FAN 80MM X 80MM 40CFM 12VDC 20 3821 HEYCO #1200 STRAIN RELIEF 2 8701 4-40 KEPS NUT ZINC 9 8793 4-40 HEX NUT ZINC 1 8760 6-32 KEPS NUT TIN PLATED 4 8800 6-32 KEPS NUT ZINC 4 8720 #8 SPRING NUT 2 8797 5/16-18 KEPS NUT JS500 2 3797 TO-247 THERMO CONDUCTIVE PAD 1 3815 TO3 PREGREASED MICA 56-03-2AP 1 3846 TO220 THERMO PAD LARGE HOLE 56359B 1 3580 12 CIR WAFER W/LCK VT 0.1" 4 3583 8 CIR WAFER W/LCK 0.1" 14 4597 22AWG STRAN TC WIR 14 4599 22AWG SOLID SC WIR T&R 3 5299 24AWG SOLID SC WIR RAD 2 4745 5.0W 0R1 5% BLK RES 2 4749 5.0W 0R15 5% BLK RES 2 4974 1.0W 0R47 5%FLAME PROOF T&R RES 3 4677 1/2W 1R 5% T&R RES 2 4973 1.0W 1R 5%FLAME PROOF T&R RES 1 4688 1/2W 2R2 5% T&R RES 1 4911 1/4W 2R2 5% T&R RES 2 4748 2.0W 3R9 5% BLK RES 6 4733 5.0W 5R6 5% BLK RES 6 4594 1/8W 10R0 2%FLAME PROOF T&R RES 2 4605 1/8W 10R 5% T&R RES 2 4610 1/4W 10R 2%FLAME PROOF T&R RES 16 4930 1/4W 10R 5% .2"U T&R RES 2 4591 1/8W 22R1 1%FLAME PROOF T&R RES 2 4589 1/8W 33R 2%FLAME PROOF T&R RES 16 4607 1/8W 39R 2%FLAME PROOF T&R RES 5 4899 1/4W 39R 5% T&R RES 2 6134 1/4W 47R 5%MINI T&R RES 2 6200 1/4W 47R5 1%FLAME PROOF T&R RES 2 4811 1/4W 68R 5% T&R RES 4 4593 1/8W 150R 2%FLAME PROOF T&R RES 2 4859 1/4W 150R 5% T&R RES 2 4984 1/4W 150R 5%MINI T&R RES 4 4909 1/4W 200R 5% T&R RES 2 6201 1/4W 200R 1%FLAME PROOF T&R RES 1 4645 1/8W 220R0 1%FLAME PROOF T&R RES 13 4857 1/4W 220R 5% T&R RES 2 4977 1/4W 220R 5%MINI T&R RES 2 4606 1/8W 249R 2%FLAME PROOF T&R RES 2 4867 1/4W 270R 5% T&R RES 2 4986 1/4W 270R 5%MINI T&R RES 6 4855 1/4W 330R 5% T&R RES 2 4821 1/4W 470R 5% T&R RES 1 4980 1/4W 470R 5%MINI T&R RES 2 4891 1/4W 620R 5% T&R RES 11 4873 1/4W 680R 5% T&R RES 2 4823 1/4W 1K 5% T&R RES 2 4934 1/4W 1K 5% .2"U T&R RES 4 4981 1/4W 1K 5%MINI T&R RES 3 4854 1/4W 1K2 5% T&R RES 4 4824 1/4W 1K5 5% T&R RES 4 4988 1/4W 1K5 5%MINI T&R RES 2 4791 1/4W 1K54 1% T&T RES 4 4808 1/4W 2K 5% T&R RES 3 6113 1/4W 2K 5%MINI T&R RES 6 4847 1/4W 2K2 5% T&R RES 2 4804 1/4W 3K 5% T&R RES 4 6124 1/4W 3K 5%MINI T&R RES 2 6136 1/4W 3K3 5%MINI T&R RES 10 4744 5.0W 3K6 5% BLK RES 12 4756 1/4W 4K120 0.1% *** T&R RES 3 4681 1.0W 4K7 5% T&R RES 4 4827 1/4W 4K7 5% T&R RES 6 4943 1/4W 4K7 5% .2"U T&R RES 1 4982 1/4W 4K7 5%MINI T&R RES 16 4887 1/4W 7K5 5% T&R RES

Qty. 2 2 1 1 1 2 3 2 1 1 20 3 64 3 2 1 4 32 8 1 2 25 114 40 12 4 2 4 4 3 8 2 2 2 1 10 1 2 4 10 6 2 2 2 4 2 2 6 6 4 6 5 8 2 2 2 6 3 2 1 6 2 2 1 2 4 4 4 2 2 4 2 4 8 2 2 8 1 5 5

YS # Description 4990 1/4W 8K2 5%MINI T&R RES 4762 1/4W 9K760 0.1% *** T&R RES 4800 1/4W 10K0 1% T&R RES 4829 1/4W 10K 5% T&R RES 4940 1/4W 10K 5% .2"U T&R RES 4983 1/4W 10K 5%MINI T&R RES 6116 1/4W 10K0 1%MINI MF T&R RES 4856 1/4W 12K 5% T&R RES 4630 1/2W 15K 5% T&R RES 4830 1/4W 15K 5% T&R RES 4771 1/4W 17K8 1% T&R RES 6125 1/4W 18K 5%MINI T&R RES 4885 1/4W 20K 5% T&R RES 6123 1/4W 20K0 1%MINI MF T&R RES 4777 1/4W 21K5 1% T&R RES 4632 1/2W 22K 5% T&R RES 4832 1/4W 22K 5% T&R RES 6118 1/4W 22K 5%MINI T&R RES 4833 1/4W 27K 5% T&R RES 4840 1/4W 33K 5% T&R RES 6122 1/4W 33K 5%MINI T&R RES 4834 1/4W 47K 5% T&R RES 6119 1/4W 47K 5%MINI T&R RES 4835 1/4W 56K 5% T&R RES 4898 1/4W 91K 5% T&R RES 4838 1/4W 100K 5% T&R RES 6120 1/4W 100K 5%MINI T&R RES 4851 1/4W 120K 5% T&R RES 4886 1/4W 200K 5% T&R RES 4641 1/2W 220K 5% T&R RES 4668 2.0W 220K 5%10MM BODY T&R RES 4841 1/4W 220K 5% T&R RES 6126 1/4W 220K 5%MINI T&R RES 4843 1/4W 470K 5% T&R RES 4844 1/4W 1M 5% T&R RES 4948 1/4W 1M 5% .2"U T&R RES 4951 1/4W 4M7 5% .2"U T&R RES 6132 1/4W 8M2 5%MINI T&R RES 3699 RELAY 2C 01AMP DC48 ???MA PC-S 3735 RELAY 1A 16AMP DC48 011MA PC-C 3604 21" 14C-28AWG DIP HDR CABLE .050" 3706 13" 8C-26AWG RIB 1 W/LCK HDR 0.1" 3740 15" 12C-26AWG RIB 1 W/LCK HDR 0.1" 8865 4-40 X 5/16 PAN PH MS SJ500 8742 4-40 X 3/8 PAN PH TAPTITE JS500 8861 4-40 X 3/8 PAN PH MS SJ500 8741 4-40 X 1/2 PAN PH MS JS500 8827 4-40 X 1/2 FLAT PH TAPTITE SJ500 8871 4-40 X 5/8 PAN PH MS SJ500 8799 #6 X 1/4 PAN PH TYPE B JS500 8832 6-32 X 1/4 PAN PH TAPTITE SJ500 8801 6-32 X 3/8 PAN PH TAPTITE SJ500 8829 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 8761 6-32 X 1/2 PAN PHIL MS ZINC CLEAR 8806 6-32 X 1/2 PAN PH TAPTITE SJ500 8837 6-32 X 1/2 ROUND PH MS SJ500 8824 8-32 X 5/16 PAN QUAD TAPTITE SJ500 8869 8-18 X 1/2 THRD CUTTING FOR PLASTIC 8999 8-32 X 5/8 PAN PH TAPTITE SJ500 8719 8-32 X 3/4 FILLISTER PHIL MS JS500 8815 8-32 X 3/4 PAN PH TAPTITE SJ500 8809 10-32 X 1/4 PAN PH TAPTITE SJ500 8749 10-32 X 1/2 QDX PH TAPTITE JS500 8731 10-16 X 5/8 TYPE B HEX W/SLOT JS500 8736 5/16-18X2-3/4 GRD 5 HEX BOLT JS500 8663 11/64 NYLON SPACER (MICRO PLASTIC) 8629 10-32 X 1/4 SPACER PHENOLIC 3746 21/64 X .250 OD #6 SPACER ALUMINUM 3751 SNAP IN 5/16 SPACER RICHCO 3739 CUSTOM .4 LED SPACER 3743 SNAP ON 0.5" SPACER RICHCO 3859 1/2 PLASTIC HEX SPACER #4 3858 3/4 PLASTIC HEX SPACER #4 8667 SHOULDER WASHER SWS-229 LENGTH 1/8 8818 3/4 OD X 5/16 ID X .08 THICK WASHER 3511 #6 FLAT WASHER NYLON 8491 #10 SPLIT LOCK WASHER BO 8850 #10 INT TOOTH LOCKWASHER BO 3502 NYLON FLAT WASHER OD.158ID.110H.070 3436 DPDT PUSH SW PCMT H BREAK B4 MAKE 3587 DPDT ROKR SW QUIK 250" AC/PWR IEC65 3705 4P3T SLID SW PCMT H 1197 AP4040 T?RD

Qty. 2 8 3 4 1 8 12 4 2 4 2 2 4 6 2 8 2 1 8 3 1 1 4 8 4 2 2 2 1 2 2 2 6 2 1 1 2 2 1 1 1 2 1 2 2 8 11 6 8 2 1 4 18 64 2 1 3 4 17 2 5 4 2 12 1 66 16 2 3 6 5 2 4 4 2 4 4 4 2 3 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+.

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

1

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

1

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

SERVICE MANUAL

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

SERVICE MANUAL

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

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

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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

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

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

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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

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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) [email protected]: 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

VOLUME CONTROL/ LIMITER
+18 D2 500mW 4.7V Q6 BC560 R49 15K R48 4K7 R7 10K LCLIP R50 15K R47 470R D6 4148 R51 220K C36 16v 22u C3 25V 47n R52 470R R53 220R

+18

ACTIVITY LEDS CIRCUIT
LVGND +18 220p C126 25V 100n C127 50V 100n 100K C2 220n 15v C22 R1 8M2 R36 LVGND 470K R4 Q2 A63 LD2
GREEN

3V0 1N5225B D3

(V+)-3v

Q5 BC560

R_ACTIVITY

-18

L_CLIP

LD6
RED

LD8 NSL28AA R43 22K C41 50V 330P

C39
C17 100P R35 20K0 6 7 LSPOST LREF RSIG LVGND RREF LCLIP RCLIP +18 -18 ACT LD4
GRN

220R R55A

LVGND

L_GAIN
P2 10K
CW

25A GAIN 16V

C26 33u R44 10K

R45 4K12

LSPOST
LSIG LREF RSIG RREF LCLIP RCLIP +18V GND -18V PRTCT ACT 220R R55B

C38 15v 220p

5

U2
1/2

MC33078P (4=V-,8=V+)

+18 8 +18 -18 LVGND LSPOST BRPRTCT LREF RREF 14 RSPRE LSPRE RSPOST LIMABLE RSIG 7

+18 LVGND -18 Q3 BC560 R32 15K R33 4K7 R8 D9 4148 R31 220K

C35 16v 22u C4 25V 47n R30 470R

LD3
RED

R29 220R

PROTECT

LVGND

BRPRTCT POWER

RCLIP

R39 15K

10K R34 470R

Q4 BC560

R136 1K2

+18

-18 1

8M2 R5 100K R2 220n 15v C21 220p C1 ACT 470K R3

LD1
GREEN

L_ACTIVITY
3V0 1N5225B D1

R_CLIP

LD5
RED

LD7 NSL28AA R46 22K C40 50V 330P R42 20K0 2 1 C37 15v 220p 3 U2
1/2

Q1 A13

LVGND

C18 100P

R_GAIN
P1 10K
CW

25A GAIN 16V

C25 33u R41 10K

R40 4K12

M1128.SCH_DATABASE_HISTORY
MODEL(S):# DATE
1 2 3 4 5 6 7 8 9 10
YORKVILLE

AP4020/AP4040/AP2020 VER# DESCRIPTION OF CHANGE
1.00 1.10 . V V V V V V V FIRST_PRODUCTION PC#5694_ADD_CONNECTIONS_FOR_BRPRTCT BETWEEN_14_PIN_CONNECTOR_&_RIBBON N N N N N N N
SHEET OF 1 SCH VERSION: TITLE: POT-BOARD 1.10

MC33078P (4=V-,8=V+)

OCT/97 APR/22/98 . D D D D D D D

DATE: APR/22/98 NAME: M1128.SCH

MODELS: PCB#&VER:

AP4020/AP4040/AP2020 POT-BOARD M1128

LSPOST LREF RREF RSIG ACT

RREF LREF

J12

V-

TO P.S. PCB

CONN3A

J7 Q6 BC560 15K 4K7 10K 470R J8 PROTECT LD3 RED D6 R5
4148

J5 J4 R49 R48 R7 R47 Q1 8M2 A13 R3 C1 LD6 L_CLIP RED 15K R50 220p
3V0

15K 100K D1 J11
-

R39 R2 BC560 R4 J10 D9 R55A D3 C4 P2 22u 16v C35 R31 220K
4V7

SPC2

LSPRE

Q3

220n

Q2

LD5

4148

POWER

470K NSL-28AA R55B GRN LD1

SPC1

C36

U2

33078P

22u 16v

1K2 220R 470R 220K 47n

Q5 LD8 #6859 R136 R53 R52 R51 C3 J2

SPC3

J3 C26 33u 16V R43 22K 330P C39

10K 220p 4K12 20K0 100P

D2 R44

100n C127

C38 R45 R35 C17

100n 10K 220p 4K12 R40 100P C18 20K0 R42 R41 C37

BC560

#6859

LD7

10K

R_ACTIVITY

Q4 NSL-28AA

BC560

L_ACTIVITY

-

-

126 33u 16V C25 R46 22K 330P C40

VCD
M1128.PCB_DATABASE_HISTORY
MODEL(S):- AP-4020 # DATE VER# DESCRIPTION OF CHANGE
1 2 3 4 5 6 7 8 9 10 11 OCT/97 APR/17/98 . DEC/09/98 . D D D D D D 1.00 2.00 . 3.00 . V V V V V V FIRST_PRODUCTION PC#5664_RIBBON_CABLE_CONNECTIONS CHANGED_FOR_PROTECT_CIRCUIT PC#5736_TRACES_CHANGED_POT_SUPPORT SCREWS_ADDED N N N N N N

NOTES
STYLE "P22"

1 P1 AND P2 FOR NORTH AMERICAN USE PART #4390 P22 2 P1 AND P2 -M1128VC POT FOR VC2402 USE PART #4394 3 ADD A STICKER OVER THE AP-4020 LEGEND "M1128VC" TO AID PCB 3511 IN IDENTIFYING WASHER 8870 SCREW VC2402 BOARDS

LED SPACER PT#3739

GRN LD4

L_GAIN J6 220R

3V0

47N 470R 220R R29

R36 LD2

8M2 GRN

R_GAIN 10K

R30

-

+

C21

220R

RED

-

0.4"

470K

R_CLIP

220n C22

220p 15K 4K7 470R 10K A63

C2 R32 R33 R34 R8

RSPRE

R1 100K J9

J13

BLACK J1

14-PIN.SOCKET

RSIG LIMABLE RSPOST P1

V+

M1128 AP4020/4040 VER 3.00

LSPOST

PRTCT RCLP LCLP

VLVGND V+

BRPRTCT

J14

BALANCED INPUT
+V
LREF C103 25V 100n C15 25V 100n

FILTER

V-

TO PIN 4 OF MC33078 C9 220p LREF R10 56K C34 16v 68N C30 16v 150N LREF TP1 56K R28 D7 4148

2 1 3 U3
1/2

TP2 16V C23 33u

V+ V+
14_PIN_CONNECTOR LVGND LVGND RSPRE 1 RREF LREF BRPRTCT LSPOST LVGND-28 VV+

LEFT CHAN
1K54 JB4 2 LIN_XLR 3 NUTRIX 1 R27 9K760 R22 C11 220p 3 2 C12 LREF R25 JB2 1 LIN_PH
S

9K760 R23 MC33078
1/2

U4

1

C33 16v 68N R109B 4M7 C29 16v 150N R20

MC33078P (4=V-,8=V+)
5

FILTER SWITCH -1dB 6Hz

IN
4

-1dB 40Hz 12Db/Oct

VVLSPRE

LSPRE RSIG LIMABLE RSPOST FROM_POT_PCB

OUT
6

S1 . S2

V+
3

220p 3
R

C10 220p 9K760 R24

120K

5
T

9K760 R26

THIS SIDE OF SWITCH NOT USED
MC33078 1/2 U4

OUT
1

OUT IN
2

LREF
ENABLE DISABLE R6 33K LREF

IN

1K54

STEREO,MONO: RSIG = RSPOST S3
L
1

LIMABLE

NO_GOLD 2

4

6
COM M
2 3

BRIDGED: RSIG =
R
4

LSPOST 7

5 6 RREF

LIMITER

MONO-STEREO-BRIDGE S3
L
9

V+
RSIG LREF RSPOST C13 25V 100n C116 22n LSPOST C14 25V 100n
1 OUT 2 IN 3

(4=V-,8V+)

GND_LIFT S4 S4
4 OUT 5 IN 6

CHGND

COM 10 M11 R12

10R S3
L
5

COM

M
6 7

R
8

.
L COM M R

R111 10R R112

(4=V-,8=V+) MC33078P
1/2

CHGND

7

U1 10K0

5 6 LREF 10K0 R38 LVGND-28

RREF

VLVGND

RIGHT CHAN
RREF NO_GOLD 2 RIN_PH
S

R37 C16 25V 100n C39 25V 100n C8 220p RREF 1K54 R13 9K760 R16 C6 220p 3 2 C5 220p R11 1K54 9K760 R12 C7 220p 9K760 R14 9K760 R15 MC33078
1/2

RREF AND LREF CONNECT TO LVGND AT THE INPUT JACKS

4
R

6
T

V+

V-

TO PIN 4 OF MC33078 16V D4 4148 R19 56K C31 16v 68N C27 16v 150N RREF 56K R9 C32 16v 68N R109A 4M7 C28 16v 150N R18 120K YORKVILLE 6 7 5 U3
1/2

BRPRTCT C24 33u RSPRE

M1129.SCH_DATABASE_HISTORY
MODEL(S):# DATE
1 2 3 4 5 6 7 8 9 10 OCT/97 NOV/12/97 D DEC/02/97 APR/22/98 . SEP/06/01 D D D

JB1 1

3

5

RREF
TP3 RREF FILTER SWITCH -1dB 6Hz
2

AP4020 VER# DESCRIPTION OF CHANGE
1.00 2.00 V 2.00 2.10 . 2.20 V V V FIRST_PRODUCTION REVERSED_INPUT_POLARITY AND_MADE_VALUE_CHANGES_FOR_AP2020 CHANGED_C27,C28,C29,C30_TO_150N PC#5694_ADD_CONNECTIONS_AT_BRIDGE SWITCH_FOR_BRPRTCT/LVGND-28 DELETE_R119 N N N
SHEET OF 1 SCH VERSION: TITLE: INPUT-BD 2.20

RREF

JB3

2 RIN_XLR 3 NUTRIX 1

U1

MC33078P (4=V-,8=V+)
IN
1

1

-1dB 40Hz 12Db/Oct

OUT
3

TP4

S1 DATE: SEP/06/2001 NAME: M1129.SCH MODELS: PCB#&VER:

AP4020/AP2020/AP4040 INPUT M1129

P:\1129V41.PRN

S4

100N C14

M1129
RIGHT 1K54 1K54 R13 R16 AP2020/AP4020/AP4040 R11

C13 EY2 100N

JB1

PART#3918 PART#3657 PART# FUNCTION

VER 4.10
R14 9K760 220P C7 U1
TP4

J31

FROM POTS J38
V+ V14-PIN.SOCKET

PART#3436 GND_LIFT BRIDGE 22N 275V

R12 9K760 9K760 C15 C8

TO_PS

J30 J29

RSPOST LIMABLE RSIG LSPRE

RT V

R38

FUNCTION C116 EY1

C24

J28 LSPOST J27 J26 J25

#3705

STEREO MONO S3

LREF

33078 TP3 R15

16V 16V 33U 33U
C23

J35

JB3

10K0

9K760 220P 100n

220P 220P

1 FOR XLR #3657 USE SCREW PT#8829 UP THROUGH THE BOTTOM 2 FOR M1129B VX1200/2400/J/2402 DO NOT STUFF J40 AND J41 ADD WIRES IN BOARD ASSEMBLY

VCD

R112 10R CHASSIS

RREF

MC2

R111 J9

RSPRE

10R

J42

J10

C5 J119 100n C39

C6 J17

J13

J11 J12 J40

10K0

J41

33K

J39

R37

J24 J23 J22

BRKT 1

TP2

TP3

R6

C27

D4
4148

R22

9K760 220P C10 J32
TP1

9K760 9K760

C31 68N 150N 56K 56K R19 R9 120K R18 150N C29

PART#3657 PART# FUNCTION JB2 PART#3918 J34 J33

R24

J16

J15

JB4 LEFT

33078

J43 LIMITER PART#3436 S2 R109A C28 150N
4M7

4148

D7

PRODUCTION NOTES

220P C9 9K760 R23 100n C16 220P C12 220P C11 R25 1K54 R26 1K54 R27

33078 U4 J36

J37 J20

R20 R28 R10

U3 120K 56K 56K 68N C34 C30 150N

68N C32 R109B

4M7

68N C33

FILTER PART#3436

J50

J19 J18

S1

M1129.PCB_DATABASE_HISTORY
MODEL(S):- AP4020/4040/2020/VX1200/2400/2402 # DATE VER# DESCRIPTION OF CHANGE
1 2 3 4 5 6 7 8 9 10 11 OCT/97 NOV/97 D D DEC/02/97 APR/16/98 . JUL/01/98 SEP/06/01 D D 1.00 2.00 V V 2.00 3.00 . 4.00 4.10 V V FIRST_PRODUCTION SWITCH_RREF_WITH_LREF_AND RSPRE_WITH_LSPRE_AT_14PIN_CONNECTOR SWAP_INPUTS_TO_BE_NONINVERTING CHANGE_C27_C28_C29_C30_TO_150N PC#5694_PINS_10-12_OF_MC2_CONNECTED TO_BRIDGE_SWITCH ISOLATE_PIN_OF_SWITCH_S3 PC#6436_REPLACE_R119_10K0->JUMPER N N

ASSEMBLY PCB MECH

R56A R44A 1K R45A 1K Q13A MPSA92

2WATT

C19A 16v 22u

D16A R41A 7K5 R42A 56K

D23A D21A

R62A 47R Q19A MJE350

RT1 10K

BAV21

1W

5W

5W

5W

TP1
R2 68R R4 2R2 Q2 BC560 R10 4K7 R13 27K R19 249R:1% R84 R15 150R C4 470P Q4 BC550 R17 249R:1% R18 10K:1% R16 12K 200R R14 39R

R83 200R

12V 500mW ZD4 12V 500mW ZD5

CW

220K R70

D7

R37 27K

D11

5W

R50A Q16A MJE340 4K7 D18A R51A 1K5 C23A 200v 10p R63A 39R Q17A

R71 100K

C1 120v 1n5 C28A 160V 10u

C7 16v 330u

R22 3K

R23 4K7 D5

TP5
D3 D4 Q6 MJL1302A Q41 MJE350 C17 220P C5 10v 22u R86 470R -F15

C8 10v 1U

4K7 R42 Q10 BC560 R43 C13 16v 22n 470R R44

20K R35A

D9 27K R39 91K R40 1K

BAV21

5W

5W

5W

5W

2W

-145

R48 39R 16v 1W
5W

MT1 Q29 Q21 YS6927 Q23 YS6927 Q25 YS6927 Q27 YS6927 -78 10u D20 16v MR854 MT2 C21

MBS4992

0.5W

C32 63V 10U

33V 1N5257 ZD13

R73 2K

R74 330R

4

E

NC
3

U2

B BOTTOM E
VIEW

GDS B CE MBS4992 BC550C BC560C

GND

BCE

E CB

M1146.SCH_DATABASE_HISTORY
MODEL(S):# DATE AP4040 VER# DESCRIPTION OF CHANGE
1.00 1.10 . 1.20 1.30 1.40 1.50 1.60 V V FIRST_PRODUCTION PC#5806_ADD_33u/16V_33R_IN_SERIES ACROSS_R57A_AND_ACROSS_R64A SPKON_JACKS_ADDED BRIDGED_SPKON_B->A PC#6278_ADD_C17_R86_AT_Q41 PC#6429_ADD_C18,[email protected]_Q40 PC#6438_ADD_R88,[email protected]_U1,U2 N N 1 2 3 4 5 6 7 8 9 10 DEC/97 AUG/26/98 . JUL/12/99 AUG/30/99 OCT/12/00 AUG/28/01 SEP/18/01 D D

C28 80V 4700U C27 80V 4700U C26 80V 4700U

C23 80V 4700U C24 80V 4700U C25 80V 4700U R66 22K
0.5W 0.5W

0.5W

CBE

EBC

EBC

IN OUT REF

U:\M1146V16.PRN

4N35 B

A
1

CLIP 1 CLIM
2 3 4 5

CLIP
R89 220K

6

C
5 4

R80 220R

ZD10 1N750 4.7V D30 1N4004

C E NC

2 3

PRTCT TSENS GND NFB SIG

U1

M1146
R205

B- B+
+145
TO POWER MODULE B

6

47K
7 8

OUTPUTS

33u R49A 2K 16V 33R R72A

C30A R57A 150R FP BC560 10K R67A Q20A C26A 10v 4u7

+145 4v ACROSS R5 R59A 10R FP R5 249R:1% C27A 120v 160V 10u 39R C29A R66A 16v 10R 330u Q18A MJE340 1.6 WATTS D19A D22A D20A R1 39R 220K R60A 47R R61A Q1 BC550 R3 2R2 Q3 BC560 16mA R7 150R C2 1N MJE350 R8 12K R82 200R R9 249R:1% LIN R11 22R R12 39R R85 0R47 C6 16v 330u R6 10K:1% +F15 C3 10v 22u C18 1N Q40 MJE340 R87 100R 75mA IDLE 75mA IDLE

R30 620R

GND

C9 200v 4N7 R29
5W

R31 39R

C10 100v 2N2
D G N S

3K6
5W

Q11 MTP10N15L Q13 YS6900 R32 39R MR854 D22 MR854 D13 Q16 YS6900 MR854 D14 Q18 YS6900 MR854 D15 Q20 Q15 YS6900 Q17 YS6900 Q19 +78 YS6900

D21 MR854

SPEAKON
1+ 122+

+78 R47A 1K5 R46A 4K7 Q12A MPSA42 C22A 200v 10p Q15A

3K3 R68A Q14A

BC550

ZD8 16v 1W R28

3K6

A/BRIDGED

R38A 56K R55A R39A 7K5 C18A 16v 22u R40A 220R D13A D14A 21K5:1%

D17A

R58A

4 WATTS Q5 MJL3281A D1 D2

C11 120v 220n

TP6
R33
1W

0.5W

CLIM CLIM

1R

SPEAKON
1+ 122+

Q14 C30 50V 22n +145 R36 270R R34 +78 R55 220R0:FP:1% YS6900

C12 16v 22n

R26 470R Q9 BC550 16V 500mW ZD7 2R2 R27

1R

YS6900 B

17K8:1% C20A R43A 16v 2N2 3K D15A

TP4

R20 3K Q7 2N6517 350V

R21 2K2

R25 220K R24

R35 1K 20K R40B 91K

TP8 TP10
R53 0R15 R56 0R1 R58 0R1 R60 0R1 L1 4uH R63 D10 R52 0R15 R57 0R1 R59 0R1 R61 0R1 R62 3R9
5W

BP2

4V7 1N750 ZD12

18K Q8 BC550

R38 2R2 R41

5R6

OUTPUTS BP1

TP9
-145 -78 R51 220R0:FP1% Q22 YS6927 D16 Q24 YS6927 D17 MR854 Q26 YS6927 D18 MR854 Q28 YS6927 D19 MR854

C19 150v 10n

-78 33u R53A 2K 16V R71A 33R BC550 C31A R64A 150R FP 3K3 R69A Q21A BC560 C25A 10V 4U7 R65A 10R FP

C31 270R 50V 22n R50 R49
1W

1R C14 120v 220n
0.5W

10K R70A

1R

TP7

MR854

33K R64 Q30 MT2 TRIAC_MAC224 G MT1

3K6 R45
5W

ZD9
S G P D

G R65 10R

+78 ISOTHERMAL TO HEATSINK R72 4K7 Q31 AS35 1 IN OUT 3 REF 2

4v ACROSS R17 R46 1K

3K6 C15 200v 2n2 4N35 B R81
1

Q12 IRF9520

R47 39R

C16 100v 470p D31 1N4004

A

4.7V/500mW 1N750 ZD11

CLIP
YS6900 YS6927 MJL1302A MJL3281A MTP10N15L MTP23P06 MAC224 BF871 BF872 MJE340 MJE350 R88 220K

6

C
5

220R

IDLE CURRENT ADJUST FOR 3 TO 5 MILLIVOLTS BETWEEN TESTPOINTS 8 & 9

-145

C

2

C29 80V 4700U

C22 80V 4700U

R69 22K

R68 22K

+145

+78 -78
R67 22K -145

G MT2 MT1 2N6517

2N5551 2N5401

AS35

MT1 NC MT2

DATE: SEP/18/2001 YORKVILLE NAME: M1146.SCH

MODELS: PCB#&VER:

AP4040 . M1146

SHEET

OF

1 SCH VERSION: TITLE: OUTPUT-BD

1.60

EY9

5WATT 0R1

5WATT 0R1

5WATT 0R1

YS6900 Q16 .

YS6900 .

YS6900 .
BLUE

MARCONI HOLE

5WATT 0R15

WC6

BC550

5WATT 0R1

5WATT 0R1

5WATT 0R1

Q24

. YS6927

. YS6927

YS6927 .

1

YS6927 .

BC560

5WATT 0R15

AS35

D20

5R6 5WATT

R64

L1

3 R6

MR854

MAC224-4 DC_PROT TRIAC

TAB6
33K

R29

R29A MTP10N15L

2K 330R

R31

J10

200V 4N7 C9

10R

39R

Q12

R74

1R/1W

Q11

4uH

R45

R65

REPPOC.zo2

MJE350 FUNCTION

R73

G

S
S

.
R84 Q6 J23

MJE340 FUNCTION

.
R49

2N2/500V C15

3K6 5WATT

OUTPUT TAB7

3K6 5WATT

C10 2N2/500V

R69 R68

WC6

J20

TP7

0.5W 0.5W

R66 R67

0.5W 0.5W

R4

C21

MR854

J22

16V/1W

ZD8 16V/1W

39R

C16

C181N/400V

Q29

3K6 5WATT

39R

D21

R47/1W 2R2 4K7

R30

1N4004

4148

27K

22R J16 249R

4148 4148

R47

R48

1K

R62
J6 J5

470P R15 150R 12K R16 D3 R19 249R

D31

Q3

39R

2R2

C19

7"YEL 16AWG

Q4

R87

J17

10N 250V

2WATT 3R9

620R

TP10

WC7

R82 200R R5 249R J26 R6 10K0 R8 12K R7 150R 1N

3K6 5WATT ZD9

470P

MBS4992

R32 39R

Q5

91K
BAV21

R85

R39

R3

22K

22K

200R 470R
R86

R10

16V 10U

G

G

S

C17 220P/200V

22K

22K

Q30

R33

OUTPUT +

G D
Q41

1R/1W

10K0 249R

R12

R13

4148

1R 1/2W

R50

V T 4700uR
80V #5896

1K

D7

4700u 80V #5896

4700u 80V #5896

4148

22N C30

ZD10

D1 D9

20K BC550 J30

4148 D4 470R R9

R37

R45A

27K

C4

R18

C5

C2 D2

39R

TP5

68R

4V7

J15

R35A

4K7

R42

4148

R25

3K

R80

220N 250V 220N 250V

470R BC550 22N Q9 C12

C32

R22

R2

C27 4700u 80V #5896

R1

C23

4700u 80V #5896

4700u 80V #5896

4700u 80V #5896

220K

J29

18K 4K7

91K

R89

1K

R42A

Q10

1N5

220K

220K

C11

C14

R70 R23

1N4004

R38A

R20 R35 R26

R27

D11

R41

"058.01X"057.41=EZIS KNALB BLANK SIZE=14.750"X10.850"

10R

56K

2K2

R88

2N2/500V C20A

R40A

TAB3 J3 R59A

HS2

R63A

J12 J13

R65A

J34

U2
THIS CAPS IS USED AS A SPACER

J14

TAB4

U1

C7

ZD4

+78V TAB2

J9

-145V

4N35

R24

GND

VR T

-78V

4N35

J32

2N6517

330U 16V

C1

TAB1

VR T

VR T

4K7 1W

C8

VR T

Q7

R55

ZD5

R21

220R

2R2

12V

12V

JZD3 3K

TAB5

220R0

1U 63V

2R2 BC560

C25

BAV21

63V 10U

VR T

VR T

VR T

33V

ZD13 R81

R43 R14

R51

VR T

16V 330U

ZD12

C6

+145V

220R

J21

20K R40B

R72

ZD11

C22

C28

4V7 4V7

R36

VR T

VR T

ZD7 16V/.5W 220K

22N

C13

C2

C24

J1

Q8

TP1

TP4

VR T

C26

39R 220R0 270R

VR T

J2

R17

4700u 80V #5896

R46

1R 1/2W

R28

R44

C3

TP6

R38

R40

R11

9

56K R71 100K

Q19A D30

D19A

10R

220R

#3894

J11

Q18A

22N

39R

D17A 10P R47A 500V

#3894

#3894

4148

47K

D15A

500V

R205

D16A 4148

C22A

Q12A
R44A

C23A

22U 16V

C18A

R68A

D20A D21A R62A

C26A

10P
R70A R69A

MJE340

MJE350
D23A

R55A HS1

4148

MJE350 Q15A

MJE340 Q16A

#3894

22U 16V

C19A

R61A

MPSA42
R50A R45A

D18A

220K

R51A

3K3

4148

4K7 4K7

2K 33R 10K 3K3

47R5

4148

1K5

21K5

4148

EY8

1K MPSA92

EY1 EY5 EY2 EY6

BC550 10K

10V 4U7
C25A Q20A

RED

4148

1+ 1-

RED 13" BLK 4" BLK 14"

EY3

Q13A

R71A

150R

BC560

R46A

BC550

R64A

HOLDER=#3676

BC560

CABLE=#3706

Q14A

YEL

R56A

R43A

YEL

C28A

R72A

L-

.

R+

ASSEMBLY PCBMECH

M1146-8.00 M1146-8.00

Q17A

C31A

R57A

16V 33u C29A
C30A

BLK

B
.

2+

EY7

C27A

EY4

160V 10u

3K 17K8

10u 160V

16V 33u

Q21A

R66A 10R

CLIM CLIP

6211M

D14A

D22A

GND SIG NFB GND TSENSE PRTCT

R53A

R67A

2W

J19

R60A

7K5 7K5

D13A 4148 4148

R39A

4148

47R5

J4

R41A

1K5

4148

L+

.

R-

1K

RED 2.5"

JB3

BLK

BLK

1

P:\1146V80.PRN

M1146
YEL

AP-4040
Q13

1

PRODUCTION NOTES
MOUNTING DETAILS FOR 5W
ADD #8629 SPACERS ONLY ON 5 WATT RESISTORS R29, R29A R45 AND R45A

Q17
Q19

MARCONI HOLE Q15

YS6900 .
R56 D13
MR854

YS6900 .
R58

YS6900 .
R60 D15
MR854

YS6900 .
R53 D22
MR854

2

D14
MR854

2 MOUNTING HARDWARE FOR Q5,Q6
#8871 4-40X 1/2" BOLT #3501 BELL WASHER T264 DEVICE #3797 THERMO PAD HEATSPREADER
Q1

1

Q18

Q20

Q14

YS6900 .

J24

PCB #8701 4-40 KEPS NUT TORQUE 4 INCH/LB

Q28

Q26

Q22

Q2

3

MOUNTING HARDWARE FOR Q40,Q41
#8741 4-40X 1/2" BOLT #3501 BELL WASHER T126 TYPE DEVICE #3797 THERMO PAD HEATSPREADER PCB #8701 4-40 KEPS NUT TORQUE 4 INCH/LB

R57
MR854

R61
MR854

R59
MR854 MR854

R52 D16 Q21

D17

D19

D18

Q23

. YS6927 Q27

. YS6927

Q31

YS6927 .
Q25

. YS6927

NOTE #6

MJL1302A MTP8P20

MJL3281A .

SOLDER WIRE TO JUMPER

.

4 MOUNTING HARDWARE FOR Q11,Q12
J18

#8741 4-40X 1/2" BOLT
RT1
VBE 10K 270R
R34

5.5"PUR 16AWG

Q40 R83

200R BC550 BC560

100R

D10

VR T

VR T

VR T

27K 10V 22U 22U 10V

HEATSPREADER

#3501 BELL WASHER #8667 SHOULDER WASHER T-220 DEVICE #3846 MICA

D5

TP9

PCB #8701 4-40 KEPS NUT TORQUE 4 INCH/LB

22N C31

5 MOUNTING HARDWARE FOR TO3 OUTPUTS
#8835 BOLT TO-3 TRANSISTOR #3815 MICA

J33

M1146 AP-4040 VER:8.00 6411M TP8 01.8BLK 3.5" BLK 18"

01.8-6411M
1 MX1

LLIRD

HEATSPREADER #8663 SPACER MICA GREASE IS REQUIRED ON BOTH SIDES OF THE MICA PAD
JB2

01.8-6411M EDISREDLOS

R58A

39R

4U7 10V

B
2-

A

EGDIRB BRIDGE 1+. 1-

#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

2K 150R 33R

R49A

330U 16V

BLK

22+
. .

M1146

2 oz. COPPER

TP5A

6 7

MODEL(S):- AP4040 # DATE VER# DESCRIPTION OF CHANGE
1 2 3 4 5 6 7 8 9 10 11 FEB/12/98 JUN/19/98 JUL/45/98 SEP/10/98 . JAN/27/99 JUL/08/99 AUG/12/99 OCT/12/00 . AUG/28/01 1.00 1.01 1.02 2.00 . 3.00 4.00 5.00 6.00 . 7.00

M1146.PCB_DATABASE_HISTORY VCD
RENAMED_M1126A->M1146 PC#5767_C10/C15/C20A_2N2_TO_PT#5427 PC#5798_R72_4K7_1/2W->4K7_1W PC#5806_ADD_33R_33u/16V_ACROSS_R57A R64A_C30A/R72A_C31A/R71A PC#5908_U1,U2_4N35->TLP621 SPKON_JACKS_RE-CONFIGURED CORRECT_ERROR_IN_SPKONS PC#6278_ADD_R86-C17_AT_Q41 PC#6083_REDO_GND_TRACKS PC#6429_ADD_R87,C18_AT_Q40

M1146.PCB_DATABASE_HISTORY
MODEL(S):- AP4040 # DATE VER# DESCRIPTION OF CHANGE
1 2 3 4 5 6 7 8 9 10 11 SEP/18/01 D D D D D D D D D D 8.00 V V V V V V V V V V PC#6438_/ADD_R88,[email protected]_U1,U2 N N N N N N N N N N

DO NOT STUFF WIRESYELL 2.5" OR SPEAKON JACKS FOR SERVICE BOARDS

YELL 19"

USE #XXXX SMALL BODY 1R 1W FOR R33,R49 MOUNTING DETAILS FOR Q30 TRIAC
USE #8799 TO MOUNT TRIAC Q30

1 IMPORTANT AFTER MOUNTING DEVICE 2 3
1/4" BEND DOWN 1/4" FROM BODY OF TRANSISTOR DO NOT CUT LEGS BEND LEGS IN DIRECTION SHOWN IT IS IMPERATIVE THAT LEGS MARKED 2 AND 3 ARE BENT FLAT AGAINST THE COPPER SURFACE

9 Q31 IS HAND INSERTED AND BENT OVER WITH FLAT SIDE UP AS SHOWN. 10

8 TAB WIRE COLOURS
TAB TAB TAB TAB TAB TAB TAB 1 2 3 4 5 6 7 RED YEL BLK WHT BLU OUTPUT OUTPUT 16AWG 16AWG 16AWG 16AWG 16AWG + -

C214A 220P 50V EY1 WC7 TR1 WC4 BLK TYPE_H 1KVA 120VAC YSL#1197 CSA C1 22n BLK CSA C2 4n7 WC18 WC10 3 WC6 RED GREY 4 13AMP 15AMPS SL225R012 SG201
SURGISTOR

BR1 3 WC14 WC2 GREY RED 4 WC3 YELLOW 13AMP BR2 1 2 C208 80V 330U C209 80V 330U C210 80V 330U 1 C207 80V 330U

EY2 EY3 EY4 EY5

PRTCT +145 RED RCLIP LCLIP +78 YELLOW -18 LVGND +18 LSIG LREF RSIG RREF ACT BRPRTCT

1 2 3 4 5 6 7

PRTCT RCLIP LCLIP -18 LVGND +18

16V

C201A 33U

R201A 10K0 2

R203A 10K0
(4=V-,8V+)

4148 D202A D201A 4148

33U C202A 16V

1 3 U201 1/2 MC33078 R204A 10K0 C214B 220P 50V R203B 10K0 6
(4=V-,8V+)

GND EY6 EY7 EY8 EY9 EY10 -145

BLACK BLACK

HIGH CURRENT TO M1126

R202A 10K0 LREF C201B 33U R201B 10K0

8 9 10 11 12

LOG

-78

WHITE

2

ACT BRPRTCT

16V

4148 D202B D201B 4148

BLUE

33U C202B 16V

7 TO VOLUME BOARD R202B 5 U201 1/2 MC33078 R204B 10K0

WC13

WC17

+78 COM NO CC+ 1N4004 D240 R240 33K CC215 4U7 Q240 MPSA06 63V R244 220K R245 1M GND ROG +145 4148 D204 R208 1K5 Q202 2N5401 C203 4u7 R206 10K 4148 D218 D205 R209 1K5 22V 500mW ZD202 R236 8K2 D211 R228 2R2 GND EY11 40CFM R211 220K R237 1M 1N4004 D206 R219 7K5 GND F1 D219 4148 R250 27K
LC 1 2 3 4 5 6 7 8

WHITE GREEN 120 VAC 60 Hz LINE BLACK

SL225R012 SG202
SURGISTOR

20V 1W ZD211

1N4004 D213 R242 47K R243 27K

1N4004 D214 ZD205 500mW 33v ZD206 500mW 33v

D215 1N4004

10K0 RREF D216 1N4004

ROG ROSIG RNFB LOG LOSIG

4148 D212 R235 8K2 R238 200K Q210 2N5401 C212 4V7 63V 500mW 1U ZD210 R234 4K7 R225 470R D210

LDRV RDRV 3 REL1 6 WC7. WC4. BLUE . 1011VA 230/245VAC CSA C1E 680N YSL#1197E WC10. . YELLOW RED GREY RED WC2. WC3. WC6. WC18. 1N4004 D203 CSA C2E 4n7 245V BROWN/BLK BROWN 230V TURN ON RELAY WC20 C3E CSA 22n WC11 GND R207 4K7 OVERHEAT SHUTDOWN DUMMY Q201 A06 20V 500mW ZD201 LOG GREY WC14. 2 COMNO C+ 4 1 C- NOCOM 8 5 ACT +78 NC NC 7

C216 25V 100U

Q241 BC550

R226 22K Q208 A06 R227 C204 25v 22n 220R 4V7 500mW ZD207 R229 2R2 R230 2R2
0.5W 0.5W 0.5W

LNFB ABOUT 5 WATTS Q207 MJF6388 +78

R213
0.5W

R215 1K

Q204 MJF6388 R217 FP 10R

+18

PRTCT

15K 18V 500mW ZD208

C205 25v 100u

4148 63v R210 10K D207

25v

C213 470u EY12

-78

18V 500mW ZD209 R214
0.5W

LVGND R216 1K Q205 MJF6668

R218
FP

C206 25v 100u -18

10R

15K

Q203 BC550

NOTE: CAPACITOR VOLTAGE RATINGS SHOWN ARE MINIMUM REQUIRED. ACTUAL PARTS MAY HAVE HIGHER VOLTAGE RATINGS. ALL UNMARKED DIODES ARE 1N4148.

M1147.SCH_DATABASE_HISTORY
+18

MODEL(S):# DATE
1 2 3 4 5 6 7 8 9 10 OCT/97 JUL/15/98 NOV/17/98 JAN/21/99 SEP/02/99 D D D D D

AP4040 VER# DESCRIPTION OF CHANGE
1.00 1.10 1.20 1.30 1.40 V V V V V
AP4040 . M1147

8AMPS

LCLIP LDRV

RC

1 2 3 4 5 6 7 8

RCLIP D220 RDRV 47K R251 RNFB ROSIG ROG 47K R252 D222 1N4004 D223 YORKVILLE 1N4004 D221 1N4004 1N4004 R254 10K R253 680R R255 Q212 A13 10K 10V 500mW ZD213 Q211 2N6517 R256 10K

AC LINE FILTER

BRN GRN/YEL EMF1E BLU

GRN/YELL

TRANSFORMER SHOWN WIRED FOR 230VAC INPUT VOLTAGE. FOR 245VAC INPUT VOLTAGE OPERATION BROWN LEAD TO WC10 AND BROWN/BLACK LEAD TO DUMMY TAB

LCLIM LC LPRTCT LC LTSENS LC GND LC LNFB LC LSIG
LC

LC

LNFB LOSIG

RCLIM RC RPRTCT RC RTSENS RC GND RC RNFB RC RSIG
RC

RC

BRPRTCT

FIRST_PRODUCTION PC#5798_ZD212->JUMPER CORRECT_C+,C-_REL1 UPDATE_XFMR_WIRE_COLOURS CORRECT_ZD201_10V->20V N N N N N
SHEET OF 1 SCH VERSION: 1.40 TITLE: POWER_SUPPLY/FAN

1

3

2

230 VAC 50 Hz LINE

DATE: SEP/02/99 NAME: M1147.SCH

MODELS: PCB#&VER:

LOG

EY9

5WATT 0R1

5WATT 0R1

5WATT 0R1

YS6900 Q16 .

YS6900 .

YS6900 .
BLUE

MARCONI HOLE

5WATT 0R15

WC6

BC550

5WATT 0R1

5WATT 0R1

5WATT 0R1

Q24

. YS6927

. YS6927

YS6927 .

1

YS6927 .

BC560

5WATT 0R15

AS35

D20

5R6 5WATT

R64

L1

3 R6

MR854

MAC224-4 DC_PROT TRIAC

TAB6
33K

R29

R29A MTP10N15L

2K 330R

R31

J10

200V 4N7 C9

10R

39R

Q12

R74

1R/1W

Q11

4uH

R45

R65

REPPOC.zo2

MJE350 FUNCTION Q41 R84 Q6 J23

R73

G

S
S

.

MJE340 FUNCTION

.
R49

2N2/500V C15

3K6 5WATT

OUTPUT TAB7

3K6 5WATT

220P C17

R69 R68

WC6

J20

TP7

0.5W 0.5W

R66 R67

C10 2N2/500V

22K 22K

0.5W 0.5W

22K 22K

Q30

R33

MR854

16V/1W

ZD8 16V/1W

39R

Q29

C16

3K6 5WATT

39R

D21

R47/1W 2R2 4K7

R30

1N4004

4148

27K

22R J16 249R

4148 4148

R47

R48

1K

R62
J6 J5

470P R15 150R 12K R16 D3 R19 249R

D31

Q3

39R

2R2

C19

7"YEL 16AWG

Q4

1N

R87

J17

10N 250V

2WATT 3R9

620R

TP10

WC7

R82 200R R5 249R J26 R6 10K0 R8 12K R7 150R 1N

3K6 5WATT ZD9

470P

MBS4992

R32 39R

200R 470R
R86

R10

R4

C21

J22

Q5

91K
BAV21

R85

R39

R3

16V 10U

OUTPUT +

G D
G S

1R/1W

10K0 249R

R12

R13

4148

D7

VR T

1R 1/2W

R50

V T 4700uR
80V #5896

VR T
4700u 80V #5896

VR T
1R 1/2W
R28

1K

27K 10V 22U
R17 C5

C18

R46

R44

C3

4700u 80V #5896

4700u 80V #5896

4148

22N C30

ZD10

D1 D9

TP6

R38

R40

R11

20K BC550 J30

4148 D4 470R R9

R37

R45A

27K

C4

R18

J2

C2 D2

39R

TP5

68R

4V7

J15

R35A

4K7

R42

4148

R25

3K

R80

220N 250V 220N 250V

470R BC550 22N Q9 C12

C32

R22

R2

C27 4700u 80V #5896

R1

C23

4700u 80V #5896

4700u 80V #5896

4700u 80V #5896

220K

J29

18K 4K7

91K

1K

R42A

Q10

1N5

1N4004

J34

C11

C14

R70 R23

R38A

R20 R35 R26

R27

D11

R41

"058.01X"057.41=EZIS KNALB BLANK SIZE=14.750"X10.850"

10R

56K

2K2

R65A

2N2/500V C20A

R40A

TAB3 J3 R59A

HS2

R63A

D30

J12 J13

U2
THIS CAPS IS USED AS A SPACER

J14

TAB4

U1

C7

ZD4

R36

+78V TAB2

J9

-145V

4N35

R24

GND

VR T

-78V

4N35

J32

2N6517

330U 16V

C1

TAB1

VR T

VR T

4K7 1W

C8

VR T

Q7

R55

ZD5

R21

220R

2R2

12V

12V

JZD3 3K

TAB5

220R0

1U 63V

2R2 BC560

C25

BAV21

63V 10U

VR T

VR T

VR T

33V

ZD13 R81

R43 R14

R51

VR T

16V 330U

ZD12

C6

+145V

220R

J21

20K R40B

R72

ZD11

C22

C28

4V7 4V7

VR T

VR T

ZD7 16V/.5W 220K

22N

C13

C2

C24

J1

Q8

TP1

TP4

VR T

C26

39R 220R0 270R

9

56K R71 100K

D19A

10R

220R

#3894

J11

Q18A

Q19A

22N

39R

D17A 10P R47A 500V

#3894

#3894

4148

47K

D15A

500V

R205

D16A 4148

C22A

Q12A
R44A

C23A

22U 16V

C18A

R68A

D20A D21A R62A

C26A

10P
R70A R69A

MJE340

MJE350
D23A

R55A HS1

4148

MJE350 Q15A

MJE340 Q16A

#3894

22U 16V

C19A

R61A

MPSA42
R50A R45A

D18A

220K

R51A

3K3

4148

4K7 4K7

2K 33R 10K 3K3

4148

1K5

47R

21K5

4148

EY8

1K MPSA92

EY1 EY5 EY2 EY6

BC550 10K

10V 4U7
C25A Q20A

RED

4148

1+ 1-

RED 13" BLK 4" BLK 14"

EY3

Q13A

R71A

150R

BC560

R46A

BC550

R64A

HOLDER=#3676

BC560

CABLE=#3706

Q14A

YEL

R56A

R43A

YEL

C28A

R72A

L-

.

R+

ASSEMBLY PCBMECH

M1146-7.00 M1146-7.00

Q17A

C31A

R57A

16V 33u C29A
C30A

BLK

B
.

2+

EY7

C27A

EY4

160V 10u

3K 17K8

10u 160V

16V 33u

Q21A

R66A 10R

CLIM CLIP

6211M

D14A

D22A

GND SIG NFB GND TSENSE PRTCT

R53A

R67A

2W

J19

R60A

7K5 7K5

D13A 4148 4148

R39A

4148

47R5

J4

R41A

1K5

4148

L+

.

R-

1K

RED 2.5"

JB3

BLK

BLK

1

P:\1146V70.PRN

M1146
YEL

AP-4040
Q13

1

PRODUCTION NOTES
MOUNTING DETAILS FOR 5W
ADD #8629 SPACERS ONLY ON 5 WATT RESISTORS R29, R29A R45 AND R45A

Q17
Q19

MARCONI HOLE Q15

YS6900 .
R56 D13
MR854

YS6900 .
R58

YS6900 .
R60 D15
MR854

YS6900 .
R53 D22
MR854

2

D14
MR854

2 MOUNTING HARDWARE FOR Q5,Q6
#8871 4-40X 1/2" BOLT #3501 BELL WASHER T264 DEVICE #3797 THERMO PAD HEATSPREADER
Q1

1

Q18

Q20

Q14

YS6900 .

J24

PCB #8701 4-40 KEPS NUT TORQUE 4 INCH/LB

Q28

Q26

Q22

Q2

3

MOUNTING HARDWARE FOR Q40,Q41
#8741 4-40X 1/2" BOLT #3501 BELL WASHER T126 TYPE DEVICE #3797 THERMO PAD HEATSPREADER PCB #8701 4-40 KEPS NUT TORQUE 4 INCH/LB

R57
MR854

R61
MR854

R59
MR854 MR854

R52 D16 Q21

D17

D19

D18

Q23

. YS6927 Q27

. YS6927

Q31

YS6927 .
Q25

. YS6927

NOTE #6

MJL1302A MTP8P20

MJL3281A .

SOLDER WIRE TO JUMPER

.

4 MOUNTING HARDWARE FOR