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SERVICE MANUAL

1. Parts List

2. Pot Board

• M1128 Schematic

• M1128 PCB layout

3. Input Board

• M1129 Schematic

• M1129 PCB layout

4. Power Supply Board

• M1127 Schematic

• M1127 PCB layout

• M1126 Schematic

• M1126 PCB layout

4. Service Kit

• M1146/m1126

5. Power Amp Module

AP4020

U.S.A.

Yorkville Sound Inc.

4625 Witmer Industrial Estate

Niagara Falls, New York

14305 USA

Voice: (716) 297-2920

Fax: (716) 297-3689

WORLD HEADQUARTERS

CANADA

Yorkville Sound

550 Granite Court
Pickering, Ontario

L1W-3Y8 CANADA

Voice: (905) 837-8481

Fax: (905) 837-8746

Quality and Innovation Since 1963

Printed in Canada

WEB:  www.yorkville.com

MODEL TYPE: YS

4020

Содержание ap4020 ys4020

Страница 1: ...ayout 4 Service Kit M1146 m1126 5 Power Amp Module AP4020 U S A Yorkville Sound Inc 4625 Witmer Industrial Estate Niagara Falls New York 14305 USA Voice 716 297 2920 Fax 716 297 3689 WORLD HEADQUARTERS CANADA Yorkville Sound 550 Granite Court Pickering Ontario L1W 3Y8 CANADA Voice 905 837 8481 Fax 905 837 8746 Quality and Innovation Since 1963 Printed in Canada WEB www yorkville com MODEL TYPE YS4...

Страница 2: ...lacement of the obsolete outlet 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 Unplug this apparatus during lightning storms or when unused for long periods of time Service The unit should be serviced only by qualified service personnel AVIS AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE N ENLEVEZ PAS LE CO...

Страница 3: ...6 8701 4 40 KEPS NUT ZINC 20 4832 1 4W 22K 5 T R RES 6 7004 2SA2121 0 TO3P PNP TRAN TK 2 8793 4 40 HEX NUT ZINC 3 6118 1 4W 22K 5 MINI T R RES 1 7005 2SC5949 0 TO3 NPN TRANSISTOR TK 2 8760 6 32 KEPS NUT TIN PLATED 64 4833 1 4W 27K 5 T R RES 1 6745 LM13600N IC XCONDUCTANCE AMP 2 8800 6 32 KEPS NUT ZINC 4 4840 1 4W 33K 5 T R RES 3 6840 MC33078P IC DUAL OP AMP 5 8854 6 32 X 1 4 0 D HEX NUT ZINC CLEAR...

Страница 4: ...iting 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 dis charge 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 The activity LED circuit con...

Страница 5: ...ction 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 darlingt...

Страница 6: ...uced to about 6 volts measured dri ving an 8 ohm load Zener ZD8 protects the gate source junction of Q11 and also pro vides a supply current path through R29 for the floating battery 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 amplifi er off and the amplifier therefore running c...

Страница 7: ... 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 dri ving the output transistors If current limit...

Страница 8: ...n 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 M1127 board but it can also be caused by M1126 cir cuit problems A damaged AS35 temperature sensor located under the M1126 heatsinks can cause erratic fan behavior No output on either or both channels could be caused by intermitte...

Страница 9: ...2 4390 10K Channel A R33 1 4W MINI 10K R48 1 4W MINI 10K R30 1 4W MINI 1K TO92 BC560C Q4 5102 R52 1 4W MINI 1K 1 4W 22M R65 1 4W 22M R15 R17 1 4W MINI 4K7 R61 1 8W FLMP 249R 100V C7 100N 100V C6 100N R27 1 4W MINI 47K R136 1 4W 1K2 C2 100V 220P R5 1 4W MINI 8M2 R4 1 4W MINI 470K 1N5225B 3V0 ZD3 0W5 C18 100V 47P C21 63V 220N R41 1 4W MINI 1K R39 1 4W 15K R44 1 4W MINI 1K RED LD6 L Clip 5906 BC560C ...

Страница 10: ...K LM13600N 4K7 RED 100N 78K7 14K7 249R 249R 47K 62K 4148 620R 249R 14K7 220R 470R 220P 15K 220P 100K 47K 249R 47P 82K 1K2 BC560C 220R 249R GRN 10K 15K 15K BC560C 22M MPSA63 LM13600N 10K AUD 10K AUD 21in 14C LCLP RCLP LVGND RSIG RREF LREF BRPRTCT ACT RREF LREF V V RSPRE RSIG LIMABLE AP4020 4040 6V00 LSPOST PRTCT V V LSPRE RSPOST M1128 LSPOST R17 R8 X17 R37 X22 X19 R18 R25 LD6 R28 C127 R19 C37 R55 C...

Страница 11: ...RIPTION OF CHANGE M1128 DRILL HISTORY AP 4020 3 5 4 2 1 DATE MODEL S VER DESCRIPTION OF CHANGE M1128 PCB_DATABASE_HISTORY AP 4020 OCT 97 1 00 FIRST PRODUCTION APR 17 98 2 00 5664 RIBBON CABLE CONNECTIONS CHANGED FOR PROTECT CIRCUIT DEC 09 98 3 00 PC 5736 TRACES CHANGED POT SUPPORT SCREWS ADDED ...

Страница 12: ... 100V S1 B FILTER SW C33 68N 100V C34 68N 100V 1 4W R23 0 1 9K76 C9 220P 100V 4148 D7 U3 A MC33078P 8 V 4 V U4 C 8 V 4 V U3 C MC33078P U4 B C13 100V 100N S T R J4 S T R J3 C15 100N 50V COM M R L MONO STEREO BRIDGED 3705 S3 D 1 4W R6 33K U4 A MC33078P 1 8W R112 10R C16 100N 50V W1 3570 U1 B MC33078P COM M R L 3705 S3 A MONO STEREO BRIDGED 13 10 7 4 1 9 11 12 8 2 3 5 6 VER MODEL S DATE DESCRIPTION O...

Страница 13: ...19 10K0 WITH JUMPER X119 PC 6873 REDO SOLDERMASK M1129 Database History CONVERT TO PCAD2002 PC 6944 ROUTE GAUGE PC 6914 ADD TARGETS AUG 15 2005 5 2 6 3 4 1 DATE MODEL S VER DESCRIPTION OF CHANGE D V N D D D V V V N N N M1129 DRILL HISTORY APR 03 2003 V06 N AUG 15 2005 V07 CONVERT TO PCAD2002 AP2020 AP4020 AP4040 AM1CE LIMITER FILTER SW GND LIFT LINE_IN 3436 3417 3436 3436 6435 3705 9K76 10K0 9K76 ...

Страница 14: ...2 2 W35 B 12 R214 8K2 1 2W 1 4W R216 1K 0W5 18V0 ZD208 MJF6668 Q205 4148 D201A 16V 33U C202A D202A 4148 C205 100U 25V C TO 221D MJF6388 B E MJF6668 B E TO 92 BC560C C BC550C 6 W36 F 8 3 W36 C 8 230 VAC 50 Hz LINE BROWN BLACK LEAD TO 245VAC INPUT VOLTAGE FOR 230VAC INPUT VOLTAGE OPERATION TRANSFORMER SHOWN WIRED FOR WHITE WC18 BLUE WC10 WC6 YELLOW WC3 GREY WC14 7 W36 G 8 8 W36 H 8 5 W36 E 8 1 W36 A...

Страница 15: ...BC550C RELAY 1A PC C RELAY 2C 12V00 TP9 TP10 X1 X39 R245 ZD211 X23 X5 ZD210 R234 R226 W34 GRN ZD205 X10 W7 RED D202B R204B X21 R202B X17 X26 X25 R2 W32 TRANS PRIM BLACK Q210 R238 R240 R244 C216 R243 D240 W30 WHITE AC C1 W4 YELL R242 W13 BRIDGE W3 YELL W24 BRIDGE W8 RED W26 YEL XFRM CT W2 WHT W1 C210 W6 BLUE 100V W10 BLACK W11 BLACK C207 D201B C214B C202B R203B DUMMY X16 C206 C205 C201A C201B C215 ...

Страница 16: ......

Страница 17: ...10R MBS4992 Q29 A 1 1_ Function J2 A 3628 SPEAKON 4C 2 2_ Function J1 B 3628 SPEAKON 4C 1 1_ Function J1 A 3628 SPEAKON 4C 1 4W R64A FUSIBLE 101R0 VCC GND OUT AS35FN Q31 1 4W R51A 1K5 BC550C Q17A 1 4W R42A 39K 2N5401 Q13A 1 4W R71 100K D21A 4148 4148 D15A 4148 D16A 1 4W R41A 7K5 1 4W R44A 1K 4148 D19A D20A 4148 1 4W R47A 1K5 1 4W R49A 2K 1 4W R57A FUSIBLE 101R0 1 4W R84 FLMP 200R 1 4W R2 68R 1 4W ...

Страница 18: ...U 63V 4 U H 10K 1 2W 1 2W 10K 10K 1 2W MBS4992 10K 1 2W MR854 2K 39R0 4148 47K 3K3 180K 4N35 1R 1 2W 33V0 TO220 Watts IRF630NPBF MR854 MR854 MR854 14V0 BC550C 13K 22U 50V 6800U 63V 63V 6800U 6800U 63V 6800U 63V MJ21195 5 0W 0R1 5 0W 0R1 MJ21195 MJ21196 4148 160V 10U MJE340 BC550C 10U 63V 16V0 6800U 63V 5 0W 0R1 MJ21195 MJ21195 MJ21196 5 0W 0R1 25V 330U BC550C 22N MJ21196 MJ21195 MJ21195 Body MJ211...

Страница 19: ...MJE340 MJE350 N C MT1 MT2 MBS4942 MAC224 MJL3281A MJL1302 E C B TO 92 MPSA63 MPSA43 MPSA13 2N5551 MPSA56 2N5401 2N6517 11 8 5 2 12 9 6 13 10 7 3 4 1 MAY 16 03 JAN 24 02 MAY 31 01 8 30 8 10 7 00 PC 6607 C10 C15 C20A 5427 5208 2n2 400V PC 6506 ZD10 ZD11 4V7 3V0 PC 6381 ADD C33 C34 R86 R87 PC 6385 C2 C4 1n 2n2 D D D D SEP 2004 AUG 12 99 V 8 20 V 8 00 6 00 N REDO SOLDERMASK PC 6514 Q13 Q20 6900 6909 Q...

Страница 20: ...te 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 sup plied with this M1146KIT STEP 1 Locate the assembly drawing for the version number printed on the M1146 or M1126 ...

Страница 21: ... there is still a damaged part on the board instantly turn ing 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 digi tal 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 quies cent current trimpot RT1 fully counter clockwise No...

Страница 22: ...1146 KIT 1N5242B 1N5242B 6450 6450 M1146 KIT 6854 5113 5114 5260 5260 5102 5102 5102 5102 5102 5101 5101 5101 5101 5101 5101 6444 MAC224 4 4749 0R15 5 WATT 4749 0R15 5 WATT 4745 0R1 5 WATT 4745 0R1 5 WATT 4745 0R1 5 WATT 4745 0R1 5 WATT 6990 MJL3281A 6989 MJL1302A 6874 6873 MJE350 MJE340 4974 4973 4607 4607 4645 4645 6201 6201 6201 4911 4911 4804 4804 4973 4977 4977 4982 4982 4591 4593 4593 4606 4...

Страница 23: ...0K R25 220K R24 1U 10v C8 4K7 R23 D5 350V 2N6517 Q7 2K2 R21 330R R74 2K R73 MT1 MT2 G TRIAC_MAC224 Q30 20K R35A 16v 10u C21 33K R64 10R R65 39R R32 39R R48 1R 0 5W R28 1R 0 5W R44 120v 220n C11 120v 220n C14 20K R40B 3R9 2W R62 150v 10n C19 BP1 BP2 16V 500mW ZD7 MR854 D20 TP4 TP5 TP7 TP6 TP9 TP10 TP1 D9 TP8 18K R70 4uH L1 5R6 5W R63 3 3K3 R68A 47K R205 10u 120v BC550 Q20A BC560 Q21A 3K3 R69A 10K R...

Страница 24: ...D30 1N4004 J18 J17 R82 200R Q29 MBS4992 L 1 4uH R33 1R 1W C14 220N 250V 22N D20 MR854 R36 91K ZD10 4V7 WC6 J10 EY3 EY9 R70 18K R67A 10K Q5 MJL3281A ZD11 4V7 R55 220R0 R28 1 2W 1R D15A 4148 R68 22K 0 5W ZD13 33V R40B 20K C30 22N J14 EY2 R69 22K 0 5W R40 1K C19 10N 250V R50 270R R43 470R D17A 4148 C8 1U 63V EY5 D31 1N4004 R80 220R 1 2 R32 39R C 2 9 5896 80V 4700u R39A 7K5 R41A 7K5 R9 249R R38A 56K R...

Страница 25: ...M1127 5 00 R E D G R EY G R EY AP4020CE AC WIRING OCT 24 2000 GREEN YELLOW 1196E 680n N L 4 17 17 15 17 WHITE BLACK GREY YELLOW RED RED GREY SHOWN WIRED FOR 230V BROWN BLACK BROWN BLUE ...

Страница 26: ...M1127 5 00 R E D G R EY G R EY AP4020CE AC WIRING OCT 24 2000 GREEN YELLOW 1196E 680n N L 4 17 17 15 17 WHITE BLACK GREY YELLOW RED RED GREY SHOWN WIRED FOR 245V BROWN BLACK BLUE BROWN ...

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