McIntosh MA7000, Service Manual

Page 1: ...ection Diagram 7 8 Backup Power Supply Schematic and PCB 9 10 Main Schematic and PCB 11 22 Display Schematic and PCB 23 26 Pushbutton Schematic and PCB 27 30 Balanced Schematic and PCB 31 34 Preamp Schematic and PCB 35 38 Capacitor Schematic and PCB 39 42 Heatsink Schematic and PCB 43 46 Meter Light Schematic and PCB 47 48 Parts List 49 56 Repacking Instruction 57 CONTENTS ...

Page 2: ... In 2 5V Signal To Noise Ratio A Weighted High Level 100dB below rated output Phono 84dB below 5mV input Power Amplifier 115 below rated output Intermodulation Distortion 0 005 maximum if the instantaneous peak power is 500 watts or less per channel with both channels operating for any combination of frequencies from 20Hz to 20 000Hz Wide Band Damping Factor Greater than 40 Input Impedance High Le...

Page 3: ...MA7000 REAR PANEL 3 ...

Page 4: ...4 SECTION LOCATIONS ...

Page 5: ...MA7000 5 6 BLOCK DIAGRAM ...

Page 6: ...7 8 INTERCONNECT 1 ...

Page 7: ...IO VIO J12 J14 J13 1 1 J10 J11 AC N AC FUSE 100V 20V 100V 20V 1 J3 1 1 J4 J5 1 1 J9 J8 D1 J16 4 J16 1 3 POWER RLY POWER TRANSFORMER PRIMARY 3 T O MAIN 3 240V 220V 120V 2 6 8 4 1 3 5 7 PRIMARY T1 2 3 1 4 K1 VBU GND 100V 1 2 t RT1 1 2 t RT2 J16 5 VBU VBU J7 1 3300pF C1 J6 1 3A t R2 1000uF C2 J17 1 J17 2 T P T EST ONLY NO CONNECT ION ...

Page 8: ...NSFORMER 3300uF C6 100uF C9 D8 D9 D7 D10 15V 15V J8 4 J8 5 2 FROM BACKUP PS 2 VBU GND 2 3 1 IN OUT U3 100uF C8 1uF C12 5V 3300uF C4 J8 1 2 PWR RELAY POWER RLY J1 J2 J3 047uF C2 D4 D5 D3 D6 1 1 BRN BRN J4 J7 VBU 1 1A t R3 1 1A t R2 47uF C1 221k R4 22 1k R5 3 1 2 Q1 3 1 2 Q2 D2 D1 221k R6 AC DETECT 5V 1 1 ORN ORN J5 J6 1 2 HS3 1 2 HS1 1 2 HS2 10uF C7 ...

Page 9: ...R13 100 R14 3 2 1 7 B GND 14 U4A 6 5 4 U4B 3 32k R22 3 1 2 G D S Q4 THERMAL PROTECTION 4 6 5 J11B 1 3 2 J13A 1 3 2 J14A 1 3 2 J15A 100 R27 100 R33 100 R37 3 2 1 8 4 U12A 4 75k R10 11 13 12 U4D J9 4 J9 8 J9 1 J9 2 J9 3 J9 5 J9 11 J9 9 10 12 7 15 4 17 2 9 11 13 14 16 18 8 6 5 3 1 GND U9 8 10 9 U8C 11 13 12 U8D 6 7 8 9 1 2 3 5 4 14 15 16 17 18 10 11 12 13 GND U10 100 R17 3 2 1 7 B GND 14 U11A 3 2 1 7...

Page 10: ...R59B 220k 3 4 R61B 220k 3 4 R63B 22k 3 4 R62B 220k 3 4 R65B 22k 3 4 R64B 220k 3 4 R67B 22k 3 4 R66B 221 R68 01uF C68 01uF C69 033uF C71 033uF C72 1 4 6 7 8 2 3 5 U15 1 4 6 7 8 2 3 5 U14 2 3 1 8 4 U16A 6 5 7 8 4 U16B 47 5 R84 L PRE OUTPUTS J18 3 BAL R J18 1 J18 11 J17 3 BAL R J17 1 J17 11 10k R43 10k R44 J16 7 R PRE J16 2 1 3 2 G J19 1 3 2 G J20 221 R47 221 R51 2 1 3 4 K1 2 1 3 4 K3 10k R46 D16 2 J...

Page 11: ...C100 221 R135 METER LOG AMP LDRV LDRV L MET 3 1 2 Q10 6 5 7 U17B POWER GUARD 1 2 3 4 LD1 3 1 2 Q9 10uF C83 2 1 3 S G D Q12 10M R108 0068uF C82 47 5k R115 47 5k R116 100 R120 2 1 3 Q17 806 R119 2 1 3 S G D Q13 100 R117 2 1 3 Q25 3 32k R122 1uF C89 100 R106 100 R105 10uF C95 150k R132 METER DRIVER J24 2 J24 6 J9 23 D24 3 1 2 Q11 2 1 3 Q15 2 1 3 Q21 3 2 1 Q24 3 32k R121 3 2 1 Q16 806 R118 221k R125 3...

Page 12: ... R MET FB R MET 3 1 2 Q30 2 3 1 8 4 B B U19A POWER GUARD 1 2 3 4 LD2 3 1 2 Q29 10uF C106 2 1 3 S G D Q32 10M R153 0068uF C105 47 5k R160 47 5k R161 100 R166 2 1 3 Q37 806 R165 2 1 3 S G D Q33 100 R163 2 1 Q45 3 32k R162 1uF C112 100 R152 100 R151 J26 2 J26 6 J9 19 J9 17 3 1 2 Q31 2 1 3 Q35 2 1 3 Q41 3 2 1 Q44 3 32k R167 3 2 1 Q36 806 R164 221k R170 3 2 1 Q34 3 2 1 Q40 6 5 7 U19B R THERM R B R B R ...

Page 13: ...MA7000 21 22 MAIN 750856 PCB 3 129903 ...

Page 14: ... 7 32 P0 4 35 P1 4 5 P1 7 8 P3 0 10 P3 3 13 P0 2 37 P1 2 3 U2 DATA DATA DATA F LCLK L PG L PG MONO RLY MUTE LED MUTE LED R PG R PG R LCLK R LCLK SCLK SCLK SCLK SCLK VOL DWN VOL UP 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 10 9 8 U1C MUTE LED 8 10 9 U4C FP IR FP IR RLY J2 16 J2 8 J2 12 J2 14 J2 6 J2 10 J2 4 5R GND 5L 5L 5L 5L ROW2 ROW3 COL0 COL2 COL1 J1 16 J1 8 J1 14 J1 6 J1 4 5L J1 12 J1 ...

Page 15: ...MA7000 25 26 DISPLAY HEADPHONE 750680 PCB 4 HEADPHONE ...

Page 16: ...1 12 LED J1 16 J1 18 LED DVD OUT1 J1 4 J1 6 TUN STBY 750681 McIntosh Pushbutton PCB Assy S2 S1 S3 ROW3 1 COL1 FROM DISPLAY J1 14 J1 2 DS5 DS6 DS3 DS4 DS1 DS2 5 Insertion Assy PC BD STANDBY ON PCB Assy J1 9 J1 11 J1 5 J1 15 J1 7 S5 S4 S6 J1 13 J1 3 4 4 ROW2 GND COL0 RES OUTPUT 2 SERVER DVD MONO CD2 OUTPUT 1 PHONO CD1 ROW 0 ROW 2 ROW 1 ROW 3 COL 0 COL 1 COL 2 129834 SERVER OUTPUT 1 DVD TO DISPLAY J1...

Page 17: ...MA7000 29 30 PUSHBUTTON 750681 PCB 5 ...

Page 18: ...BAL AMP BAL R TO MAIN 10uF C1 4 2 3 1 S G J4 10uF C8 10uF C5 100pF C11 10k R11 20K R7 CD1 DVD J1 4 1k R9 J1 8 20K R8 10k R14 1uF C4 6 5 7 8 4 U1B 100pF C13 J1 10 J1 2 J1 12 10uF C2 4 2 3 1 S G J2 J1 6 100pF C14 20K R10 2 3 1 8 4 U1A 20K R5 10k R13 15V 15V 15V 15V 15V 15V 2 J3A 3 J3B 15V 15V 1k R6 100k R3 100k R4 100k R1 100k R2 1uF C15 1uF C16 J1 3 J1 11 J1 1 3 3 3 GND GND GND ...

Page 19: ...MA7000 33 34 BALANCED 750682 PCB 6 ...

Page 20: ...01uF C31 001uF C30 100k CCW 1 2 3 4 R42A 100k CCW 5 6 7 8 R42B 47 5k R46 470pF C44 220pF C53 4 99k R56 47 5 R57 Insertion Assy BALANCE HEADPHONE HEADPHONE L HP R HP R HP R PRE J2 11 J2 7 J2 9 J1 3 J1 8 J1 4 J1 6 J1 5 M 9 10 R5C 10 R12 RELAY MONO 1 5k R2 50k COM 3 7 8 2 R5A 1 5k R1 1k R15 2 74k R21 2 74k R20 6 5 7 8 4 U2B 100uF C41 10uF C50 2 3 1 8 4 U8A 100uF C40 10uF C49 1uF C47 121k R47 L HP J3 ...

Page 21: ...MA7000 37 38 PREAMP 750683 PCB 7 ...

Page 22: ...50685 SCH 8 F R O M B R ID G E 27000uF C4 27000uF C3 J1 J5 1 J5 2 J6 1 J6 2 J3 J2 J4 T O L H T S N K T O R H T S N K 65V 65V 65V 65V 9R 9R 9L 9L 1 1 1 1 BR BR YEL BLK F R O M T R A N S F O R M E R 27000uF C2 27000uF C1 ...

Page 23: ...MA7000 41 42 CAPACITOR 750685 PCB 8 ...

Page 24: ...1k R6 D5 1 8k R12 3 2 1 Q4 3 2 1 Q9A 3 2 1 Q16A TO AUTOFRMR 5 4 Q14B 1 5k R11 3 2 1 Q11A 3 2 1 Q14A J2 3 J2 4 J2 7 J2 5 J4 100pF C9 5 4 Q15B 1 8k R10 500 2 3 1 CCW R9 3 2 1 Q15A 3 2 1 Q10A J2 1 470 1 2 o t RT1 OUTPUTS DRIVER DRIVER OUTPUTS 5 4 Q19B 5 4 Q18B 47x2 2 1 3 R14 3 1 2 Q1 1uF C11 3 2 1 Q19A 3 2 1 Q18A 5 4 Q17B 5 4 Q16B 5 4 Q13B 5 4 Q12B 5 4 Q11B 5 4 Q10B 5 4 Q9B 5 4 Q8B 65V 65V OUTPUT GP1...

Page 25: ...MA7000 45 46 HEATSINK 750684 PCB 9 129886 ...

Page 26: ... R B G D1 PCB Assy 10 2 1 3 4 R B G D2 2 1 3 4 R B G D6 J1 1 J1 2 J1 3 J1 4 J1 5 J1 6 J1 7 J1 8 J1 9 J1 10 J1 11 J1 12 2 1 3 4 R B G D5 2 1 3 4 R B G D3 2 1 3 4 R B G D4 MA7000 P1324 Meter Light PCB Assy McIntosh 221 R2 221 R4 221 R6 221 R8 221 R10 221 R12 681 R1 681 R5 681 R9 681 R3 681 R7 681 R11 310373 4 4 4 4 4 4 4 4 4 4 4 4 129899 ...

Page 27: ...T 22UF 100V 066574 C27 CAP ELECT 22UF 100V 066574 C28 CAP MONO 1UF 50V 20 061346 C29 CAP ELECT 100UF 25V 066573 C30 CAP MONO 1UF 50V 20 061346 C31 CAP ELECT 100UF 25V 066573 C32 CAP ELECT 10UF 16V 066580 C33 CAP ELECT 10UF 16V 066580 C34 CAP ELECT 10UF 16V 066580 C35 CAP ELECT 10UF 16V 066580 C36 CAP ELECT 10UF 16V 066580 C37 CAP ELECT 10UF 16V 066580 C38 CAP ELECT 10UF 16V 066580 C39 CAP ELECT 10...

Page 28: ...106 CAP ELECT 10UF 100VDC 066462 C107 CAP ELECT 47UF 35V 066446 C108 CAP ELECT 220UF 25V 066507 C109 CAP ELECT 10UF 50V 066445 C110 CAP ELECT 10UF 100VDC 066462 C111 CAP ELECT 10UF 100VDC 066462 C112 CAP MONO 1UF 50V 20 061346 C113 CAP MONO 1UF 50V 20 061346 C114 CAP MONO 1PF 50V NPO 061362 C115 CAP MONO 220PF 200V 10 NPO 061342 C116 CAP MONO 100PF 100V 10 NPO 061341 C117 CAP MONO 100PF 100V 10 NP...

Page 29: ...RANSISTOR PNP 120V 132255 Q22 TRANSISTOR NPN SILICON 132317 Q23 TRANSISTOR PNP SILICON 132304 Q24 TRANSISTOR NPN 2SC3334C 132342 Q25 TRANSISTOR PNP 2SA1321C 132343 Q26 TRANSISTOR NPN SILICON 132317 Q27 TRANSISTOR NPN SILICON 132317 Q28 TRANSISTOR NPN SILICON 132317 Q29 TRANSISTOR PNP SILICON 132304 Q30 TRANSISTOR NPN SILICON 132317 Q31 TRANSISTOR NPN SILICON 132317 Q32 TRANSISTOR N JFET 132319 Q33...

Page 30: ...W 5 137102 R95 RES MET OX 47 OHM 5W 5 137102 R96 RES WW 4 OHM 5W 5 139248 R97 RES MF 267K 1 1 4W 144532 R98 RES MF 4 75K 1 1 4W 144520 R99 RES MF 12 1K 1 1 4W 144550 R100 RES MF 221 OHM 1 1 4W 144559 R101 RES MF 10K 1 1 4W 144504 R102 RES MF 6 49K 5 1 4W 144617 R103 RES MF 100 OHM 1 1 4W 144568 R104 RES MF 365 OHM 1 1 4W 144505 R105 RES MF 100 OHM 1 1 4W 144568 R106 RES MF 100 OHM 1 1 4W 144568 R1...

Page 31: ...1346 C11 CAP MONO 1UF 50V 20 Z5U 061346 C12 CAP ELECT 220UF 25V 066507 D1 DIODE SILICON 070174 GROMMET 078031 DS1 LED AMBER 058133 DS1 LED SPACER 220 LENGTH 163001 DS2 LED AMBER 058133 DS2 LED SPACER 220 LENGTH 163001 DS3 LED GREEN 5MM 30 DEG 058190 DS3 SPACER LED 112108 DS4 LED GREEN 5MM 30 DEG 058190 DS4 SPACER LED 112108 DS5 LED GREEN 5MM 30 DEG 058190 DS5 SPACER LED 112108 DS6 LED GREEN 5MM 30...

Page 32: ...5V 066573 C14 CAP ELECT 100UF 25V 066573 C16 CAP ELECT 10UF 50V 066445 C17 CAP ELECT 10UF 50V 066445 C18 CAP MPF 0 047UF 5 63VDC 064320 C19 CAP MPF 0 047UF 5 63VDC 064320 C20 CAP ELECT 1 5UF 50V 066563 C21 CAP ELECT 1 5UF 50V 066563 C22 CAP MPF 0 01UF 5 63VDC 064312 C23 CAP MPF 0 01UF 5 63VDC 064312 C24 CAP MPF 0 47UF 5 100VDC 064442 C25 CAP MPF 0 47UF 5 100VDC 064442 C26 CAP MPF 0 0033UF 5 63VDC ...

Page 33: ...1 4W 144528 R36 RES MF 100K 1 1 4W 144528 R37 POT EQUAL 134509 R38 RES MF 681 OHM 1 1 4W 144567 R39 RES MF 681 OHM 1 1 4W 144567 R40 RES MF 100K 1 1 4W 144528 R41 RES MF 100K 1 1 4W 144528 R42 POT EQUAL 134509 R43 RES MF 475 OHM 1 1 4W 144509 R44 RES MF 475 OHM 1 1 4W 144509 R45 RES MF 47 5K 1 1 4W 144526 R46 RES MF 47 5K 1 1 4W 144526 R47 RES MF 121K 1 1 4W 144626 R48 RES MF 121K 1 1 4W 144626 R4...

Page 34: ... RT 414141 Q19 TRANSISTOR PNP THERM TRAK 132331 Q19 CLIP ANGLE RT 414141 D1 LED RGB SURFACE MOUNT 058178 D2 LED RGB SURFACE MOUNT 058178 D3 LED RGB SURFACE MOUNT 058178 D4 LED RGB SURFACE MOUNT 058178 D5 LED RGB SURFACE MOUNT 058178 D6 LED RGB SURFACE MOUNT 058178 J1 CONN 12 PIN FFC SMT RA 117990 PC BD METER LIGHT 129899 R1 RES SMD0805 681 1 8W 1 145002 R2 RES SMD0805 221 1 8W 1 145001 R3 RES SMD0...

Page 35: ...ing damage Use the original shipping carton and interior parts only if they are all in good serviceable con dition If a shipping carton or any of the interior part s are needed please call or write Customer Service Department of McIntosh Laboratory Refer to page 3 Please see the Part List for the correct part numbers Quantity Part Number Description 1 034052 Shipping carton top 1 034051 Shipping c...

Page 36: ... the constant upgrading of McIntosh products circuitry and components the Company cannot insure and does not warrant the accuracy of the within schematic material which is intended for information only McINTOSH LABORATORY INC 2 CHAMBERS STREET BINGHAMTON NEW YORK 13903 Printed in U S A Part Number 041107 SERIAL NO YK1001 And Above MA7000 INTEGRATED AMPLIFIER ...