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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

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

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

s-mm4-1v

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SERVICE MANUAL

1. Parts List (Current Model)

2. M500 Input Board
 

• M500 Schematic

 

• M500 PCB Layout

3. M1098 Power Amp Board
 

• M1098 Schematic

 

• M1098 PCB Layout

4. M520 Power Amp Board (older version)
 

• M520 Schematic

 

• M520 PCB Layout

5. M478 Power Amp Board (older version)
 

• M478 Schematic

 

• M478 PCB Layout

6. Contact Information

Summary of Contents for MM-4

Page 1: ...io L1W 3Y8 CANADA Voice 905 837 8481 Fax 905 837 8746 Quality and Innovation Since 1963 Printed in Canada s mm4 1v1 pdf 09 05 00 SERVICE MANUAL 1 Parts List Current Model 2 M500 Input Board M500 Schematic M500 PCB Layout 3 M1098 Power Amp Board M1098 Schematic M1098 PCB Layout 4 M520 Power Amp Board older version M520 Schematic M520 PCB Layout 5 M478 Power Amp Board older version M478 Schematic M4...

Page 2: ...20 CAP BLK Y 10MM AC 1 4781 1 8W 681R 1 FLAME PROOF T R RES 1 5204 _10N 100V 10 CAP T R RAD 2 FLM 2 4869 1 4W 750R 5 T R RES 1 5302 _15N 50V 10 CAP T R BEAD X7R 1 4758 1 4W 953R 1 T R RES 1 6435 _22N 275V 20 CAP BLK X2 15MM AC 1 4823 1 4W 1K 5 T R RES 2 5228 100N 100V 5 CAP T R RAD 2 FLM 5 4824 1 4W 1K5 5 T R RES 1 5314 100N 50V 10 CAP T R BEAD X7R 12 4808 1 4W 2K 5 T R RES 2 5231 220N 63V 10 CAP ...

Page 3: ...INPUT MIC JB1A 1 3 2 S R T LINE_IN NO_GOLD JB2A 1 2 3 4 5 6 249R R3A 562R R5A 100n C13 16V 10u C20 10u 10V C24 10u 25v C23 150K R35 27p C22 47K R34 27p C21 1 2 TL072 U2A 2 3 1 GREEN LD2 1K8 R47 1 2 TL072 U6 2 3 1 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DESCRIPTION OF CHANGE VER DATE MODEL S JUN 03 99 MAR 23 99 OCT 23 95 NOV 18 94 OCT 17 94 JUN 27 94 V 7 00 6 10 6 00 5 60 ...

Page 4: ..._10K 4K7_MASTER_VOLUME PC _____CLIP_CIRCUIT_REDONE CIRCUIT_ALTERED_SAME_AS_MM6 PC _____POT_STYLE_CHANGED_INPUT EXTRA_GAIN_NEEDED_FOR_M1098 U4_TL071 TL072_OP_AMP_ADDED_FOR MOLEX_MOVED_AT_REQUEST_OF_B A REMOVED_TO_MATE_WITH_M1098_PWR_AMP PC 4822_ALL_POWER_SUPPLY_COMPONENTS BY_RCA_JACK PC 4704_CHAN_3_PHONE_JACK_REPLACED AND_AC_CAPS PC 4663_REMOVED_AC_SECONDARY_FUSES PC 4637_R25_FROM_62K 24K NEW_POWER...

Page 5: ...JF6668 Q13 100R 1W R17 100R 1W R16 100n C14 470R R39 2N5638 Q14 953R R44 37K9 R2 3 TP 100n C17 WC2 10R R47 MJL21194 MJL21193 E C B WC3 B C E MJE15031 MJE15030 WC1 E B C BC560 WC1 E B C BC550 WC2 MJF6668 E C B MJF6388 E C B D S G 2N5638 E B C MPS A56 A06 BC550 Q15 C23 680n C22 4n7 T1 6A F6 3A F1 F6 3A F2 4148 D29 390R R45 4148 D28 10R R49 33R R48 PT 1398E 230 245VAC 50Hz 177VA 10N C10 10N C24 10 9 ...

Page 6: ...1 XFMR TB7 RED_SEC2 XFMR C23 SEE NOTES J9 J6 J5 J4 J2 J3 RTV RTV RTV RTV R19 120R R8 10K R47 10R R29 33R R20 274R R18 5K36 R46 33R R48 33R R49 10R R6 100K C11 1N C12 1N2 C4 100N R21 33R2 M5XX TO_PRE AMP 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DESCRIPTION OF CHANGE VER DATE DESCRIPTION OF CHANGE VER DATE MODEL S D D D D D D D D D D D MAR 08 99 JAN 25 99 JAN 11 99 OCT 19...

Page 7: ...0P C12 FE6BTR D8 FE6BTR D9 30K R20 500mW 10v D10 500mW 10v D11 MPSA43 Q2 MPSA93 Q13 C B E BC560C 200R R21 10v 100N C15 200R R22 75v 4p7 C9 BC560 Q14 16V 33U C7 BAV21 D14 2K7 R24 2K7 R25 200R R26 47R R42 2V0 250mW D12 5K1 R11 100u 63v C4 D6 D7 68K R28 68K R29 470R R30 16V 33U C5 IRFP250 G D S 68K R47 68K R48 10K 0 5W R44 25v 2N2 C3 25v 100P C13 200R R34 5uH L1 4u7 63v C16 D2 MPSA43 Q1 MPSA93 Q7 MPS...

Page 8: ...9R R47 68K R48 68K BAR DOWN D9 FE6BTR PART BAR DOWN D8 FE6BTR PART C16 63V 4U7 FUNCTION C17 63V 4U7 C1 68U 16V C2 68U 16V LINE_IN R32 30K Q9 A93 C5 33U 16V D14 BAV21 C7 33U 16V J1 J4 J3 J2 D11 10V C6 33U 16V R29 68K R22 200R J13 R23 4K7 L1 5UH D6 4148 D4 4148 R18 10K D16 4004 J6 1 FUNCTION R51 5K6 R46 5WATTS 0R1 R45 5WATTS 0R1 C20 100P R7 1K5 J5 D7 4148 R10 1K5 D15 4004 R5 4K7 J8 D10 10V R19 10K R...

Page 9: ...15K R17 100R R11 100R R10 1K5 R12 MPSA06 Q3 D3 D7 16v 68u C8 1K5 R18 4K7 R7 15p C4 BAV21 D1 1K8 0 5W R23 180R R14 4K7 R3 15K R4 63V 4u7 C3 16V BZX79C ZD2 MPSA56 Q2 MPSA56 Q1 470p C2 25V 100u C9 33V BZX79C ZD1 220n C1 1K R1 1K5 R28 GND 45VDC 45VDC 45VDC YORKVILLE PART 6803 SELECTED MJH11017 ARE NOTE ADJUST RT1 FOR 7mv BETWEEN TP1 TP2 COLD FOR EUROPEAN UNITS ONLY NOTE ADJUST RT1 FOR 2 5 3 0mv BETWEE...

Page 10: ...N5 C13 10N D5 4148 C8 68U 16V AC AC 6422 R25 0 5WATT 1K8 LD1 COLOR LD2 COLOR R37 R18 5WATT R38 R18 5WATT R24 0 5WATT 1K8 C9 100U 25V PART BDV67D 470R IDLE LINE_IN PART 6803 MJH11017 Q2 MPSA56 Q1 MPSA56 MPSA06 Q8 MPSA56 Q7 MPSA56 Q6 MPSA06 Q5 MPSA06 Q4 MJE340 FUNCTION 3892 LINE_IN 5uH PART 15K C16 PART 5859 4700U 50V C15 PART 5859 50V 4700U ASSEMBLY M478 10 00 PCB MECH M478 10 00 M478 STIR STICK IN...

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