McIntosh MC-207 Service manual

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POWER AMPLIFIER

CONTENTS

Performance Specifications ........................................ 2

Notes ......................................................................... 2

Rear Panel .................................................................. 3

Section Location ........................................................ 5

Block Diagram ........................................................... 6

Interconnection Diagram ...................................... 7 - 8

Input Schematic and PCB.................................... 9 - 12

Heatsink 1-Channel Schematic and PCB ............ 13 - 18

SERVICE MANUAL

Heatsink 2-Channel Schematic and PCB ............ 21 - 26

Display Schematic and PCB ............................... 29 - 32

Capacitor Schematic and PCB .................................. 33

Power Supply Schematic and PCB..................... 34 - 35

Parts List ............................................................ 36 - 42

Exploded Views and Parts Lists .......................... 43 - 46

Repacking Instruction .............................................. 47

PERFORMANCE SPECIFICATIONS

Power Output

Minimum sine wave continuous average power output per channel, all channels operating is: 200 watts into 4 ohm or 8 ohm load

Rated Power Band

20Hz to 20,000Hz

Total Harmonic Distortion

Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is: 0.005% for 4 or 8 ohm loads

Dynamic Headroom

1.7dB

Frequency Response

+0, -0.25dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 100,000Hz

Sensitivity

1.0 Volt Unbalanced with a 4 ohm Loudspeaker

2.0 Volt Balanced with a 4 ohm Loudspeaker

1.4 Volt Unbalanced with a 8 ohm Loudspeaker

2.8 Volt Balanced with a 8 ohm Loudspeaker

A-Weighted Signal To Noise Ratio

89dB (112dB below rated output)

Intermodulation Distortion

Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with all channels operating is: 0.005% for 4 or 8 ohm loads

Input Impedance

20,000 ohms Balanced 10,000 ohms Unbalanced

Wide Band Damping Factor

Greater than 60 at 4 ohms Greater than 140 at 8 ohms

Power Requirements

100 Volts, 50/60Hz at 1440 watts 110 Volts, 50/60Hz at 13.0 amps 120 Volts, 50/60Hz at 12.0 amps 220 Volts, 50/60Hz at 6.0 amps 230 Volts, 50/60Hz at 6.0 amps 240 Volts, 50/60Hz at 6.0 amps

Note: Refer to the rear panel of the MC207 for the correct voltage.

Dimensions

Front Panel: 17-1/2 inches (44.45cm) wide, 9-7/16 inches (23.97cm) high. Depth behind front mounting panel is 18-3/4 inches (47.63cm), including clearance for connectors.

Weight

83 pounds (37.6kg) net, 116 pounds (52.6kg) in shipping carton

1. The heavy lines on the schematic denote the primary signal path.

2. Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions: a. AC input at 120 volts, 50/60Hz. b. All voltages are +/-10% with respect to ground. A high impedance (10 megaohm) voltmeter must be used.

3. Unless otherwise specified: a. Resistor values are in ohms. b. Capacitor values are microfarads (uF). c. Inductor values are in microhenries (uH).

NO TES

4. On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin 1

5. WARNING

Parts marked with the symbol have critical characteristics. Use only replacement parts recommended by the manufacturer.

REAR PANEL

MC207

NOTES

SECTION LOCATIONS

MC207

TOP VIEW

TOP VIEW WITH COVER REMOVED

BLOCK DIAGRAM

MC207

INTERCONNECT

7 8

INPUT

050065

9 10

MC207

INPUT

050065

11 12

A B

HEATSINK 1-CHANNEL

050070

13 14

MC207

A B

HEATSINK 1-CHANNEL

DRIVER SECTION 050070

15 16

A B

HEATSINK 1-CHANNEL

050070

* Denotes components on reverse or backside of PC Board.

17 18

NOTES

MC207

19 20

A B C

HEATSINK 2-CHANNEL

050064

21 22

MC207

A B C

HEATSINK 2-CHANNEL

DRIVER SECTION 050064

23 2524

A B C

HEATSINK 2-CHANNEL

050064

DISPLAY

ILLUMINATION SECTION 050066

A B

* Denotes components on reverse or backside of PC Board.

26 2827

MC207

DISPLAY

METER SECTION 050066

DISPLAY

POWER GUARD SECTION 050066

29 30

DISPLAY

050066

* Denotes components on reverse or backside of PC Board.

31 32

MC207

CAPACITOR

050063

* Denotes components on reverse or backside of PC Board.

POWER SUPPLY

050062

MC207

POWER SUPPLY

050062

PARTS LIST

Ref No. Description

050065 INPUT PCB C1 CAP ELECT 10UF 16V 4X5 CASE 066382 C2 CAP ELECT 10UF 16V 4X5 CASE 066382 C3 CAP MONO 47PF 200V 10% NPO 061299 C4 CAP MONO 47PF 200V 10% NPO 061299 C5 CAP ELECT 10UF 16V 4X5 CASE 066382 C6 CAP ELECT 10UF 16V 4X5 CASE 066382 C7 CAP MONO .1uF 50V 20% Z5U 061305 C8 CAP MONO .1uF 50V 20% Z5U 061305 C9 CAP MONO 22PF 200V 10% NPO 061298

C10 CAP MONO 22PF 200V 10% NPO 061298 C11 CAP MONO 47PF 200V 10% NPO 061299 C12 CAP ELECT 10UF 50V 066445 C13 CAP MONO 47PF 200V 10% NPO 061299 C14 CAP ELECT 10UF 50V 066445 C15 CAP ELECT 10UF 16V 4X5 CASE 066382 C16 CAP ELECT 10UF 16V 4X5 CASE 066382 C17 CAP MONO 47PF 200V 10% NPO 061299 C18 CAP ELECT 10UF 16V 4X5 CASE 066382 C19 CAP MONO 47PF 200V 10% NPO 061299 C20 CAP MONO .1uF 50V 20% Z5U 061305 C21 CAP MONO .1uF 50V 20% Z5U 061305 C22 CAP ELECT 10UF 16V 4X5 CASE 066382 C23 CAP MONO 22PF 200V 10% NPO 061298 C24 CAP MONO .1uF 50V 20% Z5U 061305 C25 CAP MONO .1uF 50V 20% Z5U 061305 C26 CAP MONO 47PF 200V 10% NPO 061299 C27 CAP MONO 22PF 200V 10% NPO 061298

Part No.

C28 CAP MONO 47PF 200V 10% NPO 061299 C29 CAP ELECT 10UF 16V 4X5 CASE 066382 C30 CAP MONO 47PF 200V 10% NPO 061299 C31 CAP ELECT 10UF 16V 4X5 CASE 066382 C32 CAP MONO 22PF 200V 10% NPO 061298 C33 CAP MONO 47PF 200V 10% NPO 061299 C34 CAP ELECT 10UF 16V 4X5 CASE 066382 C35 CAP MONO 47PF 200V 10% NPO 061299 C36 CAP ELECT 10UF 16V 4X5 CASE 066382 C38 CAP MONO 22PF 200V 10% NPO 061298 C39 CAP MONO .1uF 50V 20% Z5U 061305 C40 CAP MONO .1uF 50V 20% Z5U 061305 C41 CAP MONO 47PF 200V 10% NPO 061299 C43 CAP ELECT 10UF 16V 4X5 CASE 066382 C44 CAP MONO 47PF 200V 10% NPO 061299 C45 CAP ELECT 10UF 16V 4X5 CASE 066382 C46 CAP MONO 22PF 200V 10% NPO 061298 C47 CAP MONO 22PF 200V 10% NPO 061298 J1 CONN MALE 9 POS FRICTION LOCK 117244 J2 JACK RCA BLK 117847 J3 JACK RCA 1X2 BLK/BLK 14MM 117848 J4 CONN 4 PIN 117215 J5 CONN 4 PIN 117215 J6 RECEPTACLE XLR FEMALE 117685 J7 RECEPTACLE XLR FEMALE 117685 J8 JACK RCA 1X2 BLK/BLK 14MM 117848 J9 CONN 4 PIN 117215 J10 CONN D 25-PIN 117501 J11 CONN 4 PIN 11721 J12 RECEPTACLE XLR FEMALE 117685 J13 RECEPTACLE XLR FEMALE 117685

PARTS LIST con’t

MC207

J14 RECEPTACLE XLR FEMALE 117685 J16 JACK RCA 1X2 BLK/BLK 14MM 117848 J17 CONN 4 PIN 117215 J18 RECEPTACLE XLR FEMALE 117685 J19 “JACK HEADPHONE DUAL BLACK 1/ 8””,117825"”” J20 RECEPTACLE XLR FEMALE 117685 R1 RES MF 1K 1% 1/4W 144090 R2 RES MF 1K 1% 1/4W 144090 R3 RES MF 20K 1% 1/4W 144104 R4 RES MF 221 OHM 1% 1/4W 144172 R5 RES MF 20K 1% 1/4W 144104 R6 RES MF 221 OHM 1% 1/4W 144172 R7 RES MF 100K 1% 1/4W 144113 R8 RES MF 100K 1% 1/4W 144113 R9 RES MF 20K 1% 1/4W 144104 R10 RES MF 20K 1% 1/4W 144104 R11 RES MF 10K 1% 1/4W 144053 R12 RES MF 10K 1% 1/4W 144053 R13 RES MF 10 OHM 1% 1/4W 144157 R14 RES MF 10K 1% 1/4W 144053 R16 RES MF 100K 1% 1/4W 144113 R17 RES MF 10K 1% 1/4W 144053 R18 RES MF 100K 1% 1/4W 144113

R19 RES MF 10 OHM 1% 1/4W 144157

R20 RES MF 1K 1% 1/4W 144090 R21 RES MF 20K 1% 1/4W 144104 R22 RES MF 221 OHM 1% 1/4W 144172 R23 RES MF 1K 1% 1/4W 144090 R24 RES MF 100K 1% 1/4W 144113 R25 RES MF 20K 1% 1/4W 144104 R26 RES MF 20K 1% 1/4W 144104 R27 RES MF 221 OHM 1% 1/4W 144172 R28 RES MF 100K 1% 1/4W 144113 R29 RES MF 10K 1% 1/4W 144053 R30 RES MF 20K 1% 1/4W 144104 R31 RES MF 10K 1% 1/4W 144053 R33 RES MF 100K 1% 1/4W 144113 R34 RES MF 10K 1% 1/4W 144053 R35 RES MF 10K 1% 1/4W 144053 R37 RES MF 100K 1% 1/4W 144113 R38 RES MF 1K 1% 1/4W 144090 R39 RES MF 20K 1% 1/4W 144104 R40 RES MF 221 OHM 1% 1/4W 144172 R41 RES MF 100K 1% 1/4W 144113 R42 RES MF 20K 1% 1/4W 144104 R43 RES MF 10K 1% 1/4W 144053 R44 RES MF 10K 1% 1/4W 144053 R45 RES MF 100K 1% 1/4W 144113 R46 RES MF 100 OHM 1% 1/4W 144196 R47 RES MF 1K 1% 1/4W 144090 R48 RES MF 20K 1% 1/4W 144104

R49 RES MF 221 OHM 1% 1/4W 144172 R50 RES MF 100K 1% 1/4W 144113 R51 RES MF 20K 1% 1/4W 144104 R55 RES MF 10K 1% 1/4W 144053 R56 RES MF 10K 1% 1/4W 144053 R58 RES MF 100K 1% 1/4W 144113 R59 RES MF 1K 1% 1/4W 144090 R60 RES MF 20K 1% 1/4W 144104 R61 RES MF 221 OHM 1% 1/4W 144172 R62 RES MF 100K 1% 1/4W 144113 R63 RES MF 20K 1% 1/4W 144104 R64 RES MF 100 OHM 1% 1/4W 144196 R65 RES MF 10K 1% 1/4W 144053 R66 RES MF 10K 1% 1/4W 144053 R68 RES MF 100K 1% 1/4W 144113 S1 SWITCH SLIDE 148059 SP1 BRACKET PCB CARD MOUNTING 003611 U1 IC DUAL OPERATIONAL AMPLIFIER 133260 U2 IC DUAL OPERATIONAL AMPLIFIER 133260 U3 IC DUAL OPERATIONAL AMPLIFIER 133260 U4 IC DUAL OPERATIONAL AMPLIFIER 133260

050064 HEATSINK1 PCB C1 CAP ELECT 47UF 35V 066446 C2 CAP ELECT 47UF 35V 066446 C3 CAP MONO .1uF 50V 20% Z5U 061305 C4 CAP POLYPROP 0.15UF 10% 250VDC 064363 C7 CAP MONO 100PF 100V 10% NPO 061300 C8 CAP MONO 100PF 100V 10% NPO 061300 C9 CAP MONO .01UF 50V 20% X7R 061304 C14 CAP MONO 100PF 100V 10% NPO 061300 C16 CAP MONO .01UF 50V 20% X7R 061304 C22 CAP ELECT 220UF 25V 066507 C27 CAP MONO 100PF 100V 10% NPO 061300 C30 CAP ELECT 47UF 35V 066446 C31 CAP ELECT .47UF 50V 066244 C32 CAP MONO .1uF 50V 20% Z5U 061305 C33 CAP MONO .1uF 50V 20% Z5U 061305

PARTS LIST con’t

C35 CAP ELECT 10UF 100VDC 066462 C36 CAP ELECT 10UF 100VDC 066462 C37 CAP ELECT 10UF 100VDC 066462 C38 CAP ELECT 10UF 100VDC 066462 C40 CAP ELECT 220UF 50V 20% 066254 C41 CAP ELECT 10UF 100VDC 066462 C47 CAP POLYPROP .047UF 10% 250VDC 064364 C51 CAP ELECT 10UF 100VDC 066462 C200 CAP ELECT 10UF 100VDC 066462 D1 DIODE SILICON 070047 D2 DIODE SILICON 070047 D4 DIODE SILICON 070047 D5 DIODE SILICON 070047 D6 DIODE RECTIFIER 070131 D7 DIODE RECTIFIER 070131 IC2 IC DUAL AMP 133259 J1 CONN MALE 9 POS FRICTION LOCK 117244 J2 CONN 4 PIN 117215 J4 CONN HEADER 2 PIN 0.156 117404 J5 BLADE FASTON .110 117712 J6 BLADE FASTON W/FEET 117708 J8 CONN HEADER 2 PIN 0.156 117404 J9 CONN 2 PIN MALE 117213 K1 RELAY 24VDC 5A 277VAC 087057 K2 RELAY 24VDC 5A 277VAC 087057 L2 CHOKE 0.65UH OUTPUT 122297 LD1 LDR NETWORK VTL5C9 144179 Q1 TRANSISTOR NPN 132223 Q2 TRANSISTOR PNP 132224 Q3 TRANSISTOR NPN 132268 Q4 TRANSISTOR PNP 132267 Q5 TRANSISTOR NPN 132223 Q6 TRANSISTOR NPN 25C3334C 132285 Q7 TRANSISTOR PNP 2SA32IC 132286 Q8 TRANSISTOR PNP POWER 132297 Q9 TRANSISTOR NPN POWER 132296 Q10 TRANSISTOR PNP POWER 132297 Q11 TRANSISTOR NPN POWER 132296 Q20 TRANSISTOR NPN POWER 132296 Q22 TRANSISTOR PNP POWER 132297 Q23 TRANSISTOR NPN POWER 132296 Q25 TRANSISTOR PNP POWER 132297 Q27 TRANSISTOR PNP 132224 Q29 TRANSISTOR PNP POWER 132255 Q30 TRANSISTOR SI NPN 25V 132254 Q31 TRANSISTOR NPN 132223 Q32 TRANSISTOR NPN 132223

Q33 TRANSISTOR PNP POWER 132255

Q35 TRANSISTOR NPN 132223

Q37 TRANSISTOR NPN 25C3334C 132285 Q39 TRANSISTOR PNP 2SA32IC 132286

Q41 TRANSISTOR PNP 132224 Q49 TRANSISTOR PNP 132224 Q50 TRANSISTOR NPN 132223 Q51 TRANSISTOR NPN 132223 Q52 TRANSISTOR NPN 132223 Q53 TRANSISTOR PNP POWER 132255 Q54 TRANSISTOR PNP 132224 Q55 TRANSISTOR PNP POWER 132255 Q56 TRANSISTOR PNP POWER 132255 Q59 TRANSISTOR NPN 132223 Q60 TRANSISTOR SI NPN 25V 132254 Q61 TRANSISTOR SI NPN 25V 132254 Q63 TRANSISTOR NPN 132223 Q64 TRANSISTOR PNP POWER 132255 R1 RES MF 332 OHM 1% 1/4W 144446 R2 RES MET OX 680 OHM 5% .5W 137093 R3 RES MF 22.1K 1% 1/4W 144187 R4 RES MF 100K 1% 1/4W 144113 R5 RES MF 22.1K 1% 1/4W 144187 R6 RES MET OX 1.8k 5% .5W 137094 R7 RES MET OX 430 OHM 5% .5W 137095 R8 RES MF 332 OHM 1% 1/4W 144446 R9 RES MET OX 680 OHM 5% .5W 137093 R10 RES MF 22.1K 1% 1/4W 144187 R11 RES MET OX 1.8k 5% .5W 137094 R12 RES MET OX 47 OHM 5% .5W 137096 R13 POT TRIM 200 OHM 20% HORIZ AD 134390 R14 RES MF 100K 1% 1/4W 144113 R15 RES MF 100 OHM 1% 1/4W 144196 R16 RES MF 100 OHM 1% 1/4W 144196 R17 RES MF 100 OHM 1% 1/4W 144196 R30 RES MF 475K 1% 1/4W 144364 R32 RES MF 47.5K 1% 1/4W 144108 R33 RES MF 47.5K 1% 1/4W 144108 R34 RES MF 5.11K 1% 1/4W 144083 R36 RES 511 OHM 1% 1/4W 144123 R37 RES MF 681K 1% 1/4W 144443 R38 RES MF 866 OHM 1% 1/4W 144028 R39 RES MF 2.21 OHM 1/4W 1% 144378 R41 RES WW DUAL .47 OHM 5% 3W 139244 R42 RES WW DUAL .47 OHM 5% 3W 139244 R43 RES WW DUAL .47 OHM 5% 3W 139244 R45 RES WW DUAL .47 OHM 5% 3W 139244 R46 RES MF 4.75K 1% 1/4W 144097

PARTS LIST con’t

MC207

R48 RES MF 100 OHM 1% 1/4W 144196 R50 RES MF 14.7K 1% 1/4W 144149 R51 RES MF 221 OHM 1% 1/4W 144172 R52 RES MF 267K 1% 1/4W 144118 R53 RES MF 221 OHM 1% 1/4W 144172 R54 RES MF 3.32K 1% 1/4W 144095 R55 RES MF 3.32K 1% 1/4W 144095 R56 RES MF 10K 1% 1/4W 144053 R57 RES MF 475K 1% 1/4W 144364 R58 RES MF 1.1K 1% 1/4W 144091 R59 RES MF 2.21 OHM 1/4W 1% 144378 R60 RES FP 22 OHM 1/4W 5% 137033 R62 RES MF 22.1K 1% 1/4W 144187 R63 RES FP 22 OHM 1/4W 5% 137033 R65 RES MF 681K 1% 1/4W 144443 R67 RES MF 100 OHM 1% 1/4W 144196 R70 RES MF 100 OHM 1% 1/4W 144196 R71 RES MF 100 OHM 1% 1/4W 144196 R72 RES MF 100 OHM 1% 1/4W 144196 R77 RES MF 1M 1/4W 144269 R79 RES CF 10 OHM 5% 1/2W 141165 R82 RES MF 1M 1/4W 144269 R83 RES MF 10K 1% 1/4W 144053 R84 RES MF 47.5K 1% 1/4W 144108 R85 RES MF 1.1K 1% 1/4W 144091 R86 RES MF 4.75K 1% 1/4W 144097 R88 RES MF 12.1K 1% 1/4W 144154 R90 RES MF 1.1K 1% 1/4W 144091 R93 RES MF 4.75K 1% 1/4W 144097 R101 RES MF 953 OHM 1/4W 1% 144473 R103 RES MF 332K 1% 1/4W 144119 R104 RES MF 15K 1% 1/4W 144412 R105 RES MF 6.49K 1% 1/4W 144140 R106 RES MF 475 OHM 1% 1/4W 144086 R109 RES CF 0 ohm 141389 R111 RES MET OX 430 OHM 5% .5W 137095 R114 RES CF 10 OHM 5% 1/2W 141165 R119 RES MO 4.7 OHM 1W 5% 144464 R122 RES MF 47.5K 1% 1/4W 144108 R123 RES MF 22.1K 1% 1/4W 144187 R124 RES MF 47.5K 1% 1/4W 144108 RT1 THERMAL 144249 RT2 THERMAL 144249

050064 HEATSINK2 PCB C1 CAP ELECT 47UF 35V 066446 C2 CAP ELECT 47UF 35V 066446 C3 CAP MONO .1uF 50V 20% Z5U 061305 C4 CAP POLYPROP 0.15UF 10% 250VDC 064363

C7 CAP MONO 100PF 100V 10% NPO 061300 C8 CAP MONO 100PF 100V 10% NPO 061300 C9 CAP MONO .01UF 50V 20% X7R 061304 C10 CAP ELECT 47UF 35V 066446 C11 CAP ELECT 47UF 35V 066446 C12 CAP MONO 100PF 100V 10% NPO 061300 C13 CAP MONO 100PF 100V 10% NPO 061300 C14 CAP MONO 100PF 100V 10% NPO 061300 C15 CAP MONO .1uF 50V 20% Z5U 061305 C16 CAP MONO .01UF 50V 20% X7R 061304 C17 CAP MONO .01UF 50V 20% X7R 061304 C18 CAP MONO .01UF 50V 20% X7R 061304 C19 CAP MONO 100PF 100V 10% NPO 061300 C22 CAP ELECT 220UF 25V 066507 C27 CAP MONO 100PF 100V 10% NPO 061300 C28 CAP MONO 100PF 100V 10% NPO 061300 C29 CAP ELECT 47UF 35V 066446 C30 CAP ELECT 47UF 35V 066446 C31 CAP ELECT .47UF 50V 066244 C32 CAP MONO .1uF 50V 20% Z5U 061305 C33 CAP MONO .1uF 50V 20% Z5U 061305 C35 CAP ELECT 10UF 100VDC 066462 C36 CAP ELECT 10UF 100VDC 066462 C37 CAP ELECT 10UF 100VDC 066462 C38 CAP ELECT 10UF 100VDC 066462 C39 CAP ELECT .47UF 50V 066244 C40 CAP ELECT 220UF 50V 20% 066254 C41 CAP ELECT 10UF 100VDC 066462 C44 CAP ELECT 220UF 25V 066507 C47 CAP POLYPROP .047UF 10% 250VDC 064364 C48 CAP POLYPROP .047UF 10% 250VDC 064364 C50 CAP ELECT 10UF 100VDC 066462 C51 CAP ELECT 10UF 100VDC 066462 C200 CAP ELECT 10UF 100VDC 066462 D1 DIODE SILICON 070047 D2 DIODE SILICON 070047

PARTS LIST con’t

D4 DIODE SILICON 070047 D5 DIODE SILICON 070047 D6 DIODE RECTIFIER 070131 D7 DIODE RECTIFIER 070131 D8 DIODE SILICON 070047 D9 DIODE SILICON 070047 D11 DIODE SILICON 070047 D12 DIODE SILICON 070047 D13 DIODE RECTIFIER 070131 D14 DIODE RECTIFIER 070131 IC1 IC DUAL AMP 133259 IC2 IC DUAL AMP 133259 J1 CONN MALE 9 POS FRICTION LOCK 117244 J2 CONN 4 PIN 117215 J3 CONN HEADER 2 PIN 0.156 117404 J4 CONN HEADER 2 PIN 0.156 117404 J5 BLADE FASTON .110 117712 J6 BLADE FASTON W/FEET 117708 J8 CONN HEADER 2 PIN 0.156 117404 J9 CONN 2 PIN MALE 117213 J10 CONN 2 PIN MALE 117213 K1 RELAY 24VDC 5A 277VAC 087057 K2 RELAY 24VDC 5A 277VAC 087057 L1 CHOKE 0.65UH OUTPUT 122297 L2 CHOKE 0.65UH OUTPUT 122297 LD1 LDR NETWORK VTL5C9 144179 LD2 LDR NETWORK VTL5C9 144179 Q1 TRANSISTOR NPN 132223 Q2 TRANSISTOR PNP 132224 Q3 TRANSISTOR NPN 132268 Q4 TRANSISTOR PNP 132267 Q5 TRANSISTOR NPN 132223 Q6 TRANSISTOR NPN 25C3334C 132285 Q7 TRANSISTOR PNP 2SA32IC 132286 Q8 TRANSISTOR PNP POWER 132297 Q9 TRANSISTOR NPN POWER 132296 Q10 TRANSISTOR PNP POWER 132297 Q11 TRANSISTOR NPN POWER 132296 Q12 TRANSISTOR NPN 132223 Q13 TRANSISTOR PNP 132224 Q14 TRANSISTOR NPN 132223 Q15 TRANSISTOR PNP 2SA32IC 132286 Q16 TRANSISTOR NPN 25C3334C 132285 Q17 TRANSISTOR PNP 132267 Q18 TRANSISTOR NPN 132268 Q19 TRANSISTOR NPN POWER 132296 Q20 TRANSISTOR NPN POWER 132296 Q21 TRANSISTOR PNP POWER 132297 Q22 TRANSISTOR PNP POWER 132297 Q23 TRANSISTOR NPN POWER 132296 Q24 TRANSISTOR NPN POWER 132296 Q25 TRANSISTOR PNP POWER 132297

Q26 TRANSISTOR PNP POWER 132297 Q27 TRANSISTOR PNP 132224 Q28 TRANSISTOR SI NPN 25V 132254 Q29 TRANSISTOR PNP POWER 132255 Q30 TRANSISTOR SI NPN 25V 132254 Q31 TRANSISTOR NPN 132223 Q32 TRANSISTOR NPN 132223 Q33 TRANSISTOR PNP POWER 132255 Q34 TRANSISTOR NPN 132223 Q35 TRANSISTOR NPN 132223 Q36 TRANSISTOR NPN 25C3334C 132285 Q37 TRANSISTOR NPN 25C3334C 132285 Q38 TRANSISTOR PNP POWER 132255 Q39 TRANSISTOR PNP 2SA32IC 132286 Q40 TRANSISTOR PNP 132224 Q41 TRANSISTOR PNP 132224 Q42 TRANSISTOR NPN 132223 Q43 TRANSISTOR PNP 132224 Q44 TRANSISTOR PNP POWER 132255 Q45 TRANSISTOR PNP POWER 132255 Q46 TRANSISTOR PNP 132224 Q47 TRANSISTOR SI NPN 25V 132254 Q48 TRANSISTOR PNP 2SA32IC 132286 Q49 TRANSISTOR PNP 132224 Q50 TRANSISTOR NPN 132223 Q51 TRANSISTOR NPN 132223 Q52 TRANSISTOR NPN 132223 Q53 TRANSISTOR PNP POWER 132255 Q54 TRANSISTOR PNP 132224 Q55 TRANSISTOR PNP POWER 132255 Q56 TRANSISTOR PNP POWER 132255 Q57 TRANSISTOR SI NPN 25V 132254 Q58 TRANSISTOR NPN 132223 Q59 TRANSISTOR NPN 132223 Q60 TRANSISTOR SI NPN 25V 132254 Q61 TRANSISTOR SI NPN 25V 132254 Q62 TRANSISTOR PNP 132224 Q63 TRANSISTOR NPN 132223 Q64 TRANSISTOR PNP POWER 132255 R1 RES MF 332 OHM 1% 1/4W 144446 R2 RES MET OX 680 OHM 5% .5W 137093 R3 RES MF 22.1K 1% 1/4W 144187 R4 RES MF 100K 1% 1/4W 144113 R5 RES MF 22.1K 1% 1/4W 144187 R6 RES MET OX 1.8k 5% .5W 137094 R7 RES MET OX 430 OHM 5% .5W 137095 R8 RES MF 332 OHM 1% 1/4W 144446 R9 RES MET OX 680 OHM 5% .5W 137093 R10 RES MF 22.1K 1% 1/4W 144187 R11 RES MET OX 1.8k 5% .5W 137094

PARTS LIST con’t

MC207

R12 RES MET OX 47 OHM 5% .5W 137096 R13 POT TRIM 200 OHM 20% HORIZ AD 134390 R14 RES MF 100K 1% 1/4W 144113 R15 RES MF 100 OHM 1% 1/4W 144196 R16 RES MF 100 OHM 1% 1/4W 144196 R17 RES MF 100 OHM 1% 1/4W 144196 R18 RES MET OX 47 OHM 5% .5W 137096 R19 RES MET OX 1.8k 5% .5W 137094 R20 RES MF 332 OHM 1% 1/4W 144446 R21 RES MF 22.1K 1% 1/4W 144187 R22 RES MET OX 680 OHM 5% .5W 137093 R23 RES MET OX 430 OHM 5% .5W 137095 R24 RES MET OX 680 OHM 5% .5W 137093 R25 RES MF 22.1K 1% 1/4W 144187 R26 RES MET OX 1.8k 5% .5W 137094 R27 RES MF 332 OHM 1% 1/4W 144446 R28 POT TRIM 200 OHM 20% HORIZ AD 134390 R29 RES MF 475K 1% 1/4W 144364 R30 RES MF 475K 1% 1/4W 144364 R31 RES MF 5.11K 1% 1/4W 144083 R32 RES MF 47.5K 1% 1/4W 144108 R33 RES MF 47.5K 1% 1/4W 144108 R34 RES MF 5.11K 1% 1/4W 144083 R35 RES MF 47.5K 1% 1/4W 144108 R36 RES 511 OHM 1% 1/4W 144123 R37 RES MF 681K 1% 1/4W 144443 R38 RES MF 866 OHM 1% 1/4W 144028 R39 RES MF 2.21 OHM 1/4W 1% 144378 R40 RES WW DUAL .47 OHM 5% 3W 139244 R41 RES WW DUAL .47 OHM 5% 3W 139244 R42 RES WW DUAL .47 OHM 5% 3W 139244 R43 RES WW DUAL .47 OHM 5% 3W 139244 R44 RES WW DUAL .47 OHM 5% 3W 139244 R45 RES WW DUAL .47 OHM 5% 3W 139244 R46 RES MF 4.75K 1% 1/4W 144097 R47 RES MF 4.75K 1% 1/4W 144097 R48 RES MF 100 OHM 1% 1/4W 144196 R49 RES MF 1.1K 1% 1/4W 144091 R50 RES MF 14.7K 1% 1/4W 144149 R51 RES MF 221 OHM 1% 1/4W 144172

R52 RES MF 267K 1% 1/4W 144118 R53 RES MF 221 OHM 1% 1/4W 144172 R54 RES MF 3.32K 1% 1/4W 144095 R55 RES MF 3.32K 1% 1/4W 144095 R56 RES MF 10K 1% 1/4W 144053 R57 RES MF 475K 1% 1/4W 144364 R58 RES MF 1.1K 1% 1/4W 144091 R59 RES MF 2.21 OHM 1/4W 1% 144378 R60 RES FP 22 OHM 1/4W 5% 137033 R61 RES MF 100 OHM 1% 1/4W 144196 R62 RES MF 22.1K 1% 1/4W 144187 R63 RES FP 22 OHM 1/4W 5% 137033 R64 RES MF 10K 1% 1/4W 144053 R65 RES MF 681K 1% 1/4W 144443 R66 RES MF 681K 1% 1/4W 144443 R67 RES MF 100 OHM 1% 1/4W 144196 R68 RES MF 475K 1% 1/4W 144364 R69 RES MF 22.1K 1% 1/4W 144187 R70 RES MF 100 OHM 1% 1/4W 144196 R71 RES MF 100 OHM 1% 1/4W 144196 R72 RES MF 100 OHM 1% 1/4W 144196 R73 RES MF 100 OHM 1% 1/4W 144196 R74 RES MF 100 OHM 1% 1/4W 144196 R75 RES MF 267K 1% 1/4W 144118 R76 RES MF 221 OHM 1% 1/4W 144172 R77 RES MF 1M 1/4W 144269 R78 RES MF 100 OHM 1% 1/4W 144196 R79 RES CF 10 OHM 5% 1/2W 141165 R80 RES CF 10 OHM 5% 1/2W 141165 R81 RES MF 100 OHM 1% 1/4W 144196 R82 RES MF 1M 1/4W 144269 R83 RES MF 10K 1% 1/4W 144053 R84 RES MF 47.5K 1% 1/4W 144108 R85 RES MF 1.1K 1% 1/4W 144091 R86 RES MF 4.75K 1% 1/4W 144097 R87 RES MF 14.7K 1% 1/4W 144149 R88 RES MF 12.1K 1% 1/4W 144154 R89 RES MF 953 OHM 1/4W 1% 144473 R90 RES MF 1.1K 1% 1/4W 144091 R91 RES MF 681K 1% 1/4W 144443 R92 RES MF 866 OHM 1% 1/4W 144028 R93 RES MF 4.75K 1% 1/4W 144097 R94 RES MF 47.5K 1% 1/4W 144108 R95 RES MF 1.1K 1% 1/4W 144091 R96 RES MF 3.32K 1% 1/4W 144095 R97 RES 511 OHM 1% 1/4W 144123 R98 RES MF 3.32K 1% 1/4W 144095 R99 RES MF 221 OHM 1% 1/4W 144172 R100 RES MF 1.1K 1% 1/4W 144091 R101 RES MF 953 OHM 1/4W 1% 144473 R102 RES MF 332K 1% 1/4W 144119 R103 RES MF 332K 1% 1/4W 144119 R104 RES MF 15K 1% 1/4W 144412

PARTS LIST con’t

R105 RES MF 6.49K 1% 1/4W 144140 R106 RES MF 475 OHM 1% 1/4W 144086 R107 RES MF 475 OHM 1% 1/4W 144086 R108 RES MF 6.49K 1% 1/4W 144140 R109 RES CF 0 ohm 141389 R110 RES MET OX 430 OHM 5% .5W 137095 R111 RES MET OX 430 OHM 5% .5W 137095 R112 RES MF 1M 1/4W 144269 R113 RES CF 10 OHM 5% 1/2W 141165 R114 RES CF 10 OHM 5% 1/2W 141165 R115 RES MF 1M 1/4W 144269 R119 RES MO 4.7 OHM 1W 5% 144464 R120 RES MO 4.7 OHM 1W 5% 144464 R122 RES MF 47.5K 1% 1/4W 144108 R123 RES MF 22.1K 1% 1/4W 144187 R124 RES MF 47.5K 1% 1/4W 144108 RT1 THERMAL 144249 RT2 THERMAL 144249

050066 DISPLAY PCB C1 CAP ELECT 10UF 50V 066445 C2 CAP MPF 0.47UF 5% 50/63VDC 064333 C3 CAP MONO .1uF 50V 20% Z5U

061305 C4 CAP MONO .1uF 50V 20% Z5U 061305 C5 CAP MPF 0.1UF 5% 63VDC 064325 C6 CAP ELECT 10UF 50V 066445 C7 CAP MPF 0.47UF 5% 50/63VDC 064333 C8 CAP MONO .1uF 50V 20% Z5U 061305 C9 CAP MONO .1uF 50V 20% Z5U 061305 C10 CAP MPF 0.1UF 5% 63VDC 064325 C11 CAP ELECT 10UF 50V 066445

C12 CAP MPF 0.47UF 5% 50/63VDC 064333 C13 CAP MONO .1uF 50V 20% Z5U 061305 C14 CAP ELECT 100UF 16V OR 25V 066447 C15 CAP MPF 0.1UF 5% 63VDC 064325 C16 CAP MONO .1uF 50V 20% Z5U 061305 D1 DIODE SILICON 070047 D2 DIODE SILICON 070047 D3 DIODE SILICON 070047 D4 DIODE SILICON 070047

D5 DIODE SILICON 070047 D6 DIODE SILICON 070047 D7 DIODE SILICON 070047 D8 DIODE SILICON 070047 D9 DIODE SILICON 070047 D10 DIODE SILICON 070047 D11 DIODE SILICON 070047 D12 DIODE SILICON 070047 D13 DIODE SILICON 070047 D14 DIODE SILICON 070047 D15 DIODE SILICON 070047 D16 DIODE SILICON 070047 D17 DIODE SILICON 070047 D18 DIODE SILICON 070047 D19 DIODE SILICON 070047 D20 DIODE SILICON 070047 D21 DIODE SILICON 070047 D22 DIODE SILICON 070047 D23 DIODE SILICON 070047 D24 DIODE SILICON 070047 D25 DIODE SILICON 070047 D26 DIODE SILICON 070047 D27 DIODE SILICON 070047 D28 DIODE SILICON 070047 D29 DIODE SILICON 070047 D30 DIODE SILICON 070047 DS1 LED BLUE 5MM HI-INTENSITY

“VF[V] 3.6””” 058166(1)112108(1)

DS2 LED BLUE 5MM HI-INTENSITY

“VF[V] 3.6””” 058166(1)112108(1)

DS3 LED GREEN 5MM HI-INTENSITY

“VF[V] 3.5””” 058165(1)112108(1)

DS4 LED GREEN 5MM HI-INTENSITY

“VF[V] 3.5””” 058165(1)112108(1)

DS5 LED RED HIGH EFFICIENCY 058148 DS6 LED BLUE 5MM HI-INTENSITY

“VF[V] 3.6””” 058166(1)112108(1) DS7 LED BLUE 5MM HI-INTENSITY

“VF[V] 3.6””” 058166(1)112108(1) DS8 LED GREEN 5MM HI-INTENSITY

“VF[V] 3.5””” 058165(1)112108(1) DS9 LED GREEN 5MM HI-INTENSITY

MC207 EXPLODED VIEW

MC207

43 44

MC207 EXPLODED VIEW and PARTS LIST

Ref No. Description

Part No.

1 016507 GLASS 2 094360 TAPE FOAM 1/2 X 1/2 3 004939 BRACKET EXTRUSION 4 018615 END CAP 9” 5 101042 SCREW TS 4-40 X 1/2 SLOT FILL 6 094016 TAPE FOAM 1/4 X 1/8 7 098113 CORD DIAL .027 BLACK BRAID SILK 8 018706 EXTRUSION BOTTOM 9 100149 SCREW MACH 6-32 X 1/4 FL U/H ST 10 101232 SCREW 6-32 X 1/4 PH FLAT 11 018619 EXTRUSION TOP 12 104164 WASHER BLK FELT 1 X 1/4 X 1/16 13 049321 ASSY KNOB 14 092413 ACETATE FILTER BLUE DISPLAY 15 005407 SUBPANEL 16 017901 LOGO PUSHBUTTON BACKLIGHT 17 017921 LOGO/SELECTOR BACKLIGHT 18 094429 FOAM TAPE WHITE 1/32” THK 19 146243 SWITCH POWER 20 021159 BUSHING SWITCH 21 104014 WASHER INT STAR 3/8 X .507 X .002 22 124089 METER MC207 23 017922 METER BACKLIGHT 24 005411 METER PLATE 25 102001 NUT KEP 4-40 CADMIUM PLATE 26 050066 ASSY METER/DISPLAY PCB 27 112038 SPACER STEEL 4 X 3/8L NCKL PLT 28 112060 SP ACER 4 X 5/16 STEEL 29 005404 DUST COVER 30 100287 SCREW MACH 8-32 X 3/8 PH TRUSS HD 31 126999 DECAL DUST COVER 32 005408 CHASSIS 33 101054 SCREW TAPTITE 6-32 X 1/4 PH PN BLK 34 078024 GROMMET RUBBER 1” ID 35 078040 GROMMET 3/4” X 1” 36 017956 TRANSFORMER SHIELD 37 050061 POTTED TRANSFORMER POWER 38 166001 DECAL POWER TRANSFORMER 39 050090 CAN POTTED CAPACITOR 40 166002 DECAL CAPACITOR COVER 41 094450 SOUND DAMPING PAD MC207 42 050063 ASSY CAPACITOR PCB 43 005413 CAPACITOR CLAMP 44 102045 NUT KEP 6-32 X 1/2 PH PN 45 100118 SCREW MACH 6-32 X 1/2 PH PN 46 018750 HEATSINK 47 084183 ISOSTRATE 48 050064 ASSY HEATSINK PCB 2 CH 49 101059 SCREW SM 6 X 5/8 PH PN TYPE A 50 112087 SP ACER PCB 1/4”

51 114118 TRANSISTOR CLIP 218 52 114119 TRANSISTOR CLIP 214 53 005007 ASSY HEATSINK PCB 1 CH 54 005439 COVER HEATSINK CH 5-6 55 005406 HEATSINK COVER CENTER 56 005405 COVER HEATSINK CH 1-3 57 084124 POST BINDING DUAL 58 005419 OUTPUT PLATE TRIPLE 59 005418 OUTPUT PLATE SINGLE 60 104130 WASHER LOCK #10 SPLIT PHOS/BRNZ 61 104148 WASHER FLAT BRASS 62 110009 NUT M5 X 0.8 BRASS W/GOLD PLATE 63 074091 TERMINAL BLOCK AC 64 005435 TERMINAL BRACKET 65 104001 WASHER FLAT STEEL 4 X 9/32 X .025 66 104142 WASHER LOCK 2.5mm INT STAR ZINC 67 102022 NUT MACH 4-40 X 3/16 X 1/16 68 114072 RIVET PLASTIC 69 005434 TRANSFORMER BRACKET 70 102003 NUT MACH 6-32 W/LOCK 71 094255 CABLE TIE PANDUIT PLT1M-M 72 017452 KLIP WIRE 73 021094 SPACER 4 X 1/4 74 104014 3/8 INT STAR WASHER 75 084209 THERMSTRATE MC207 76 102020 NUT MACH 6-32 SELF LOCK 77 050062 ASSY POWER SUPPLY PCB 78 018751 SUB HEATSINK 79 114141 CLIP RIGHT ANGLE 80 100250 SCREW MACH SEMS 6-32 X 1/4 PH PN 81 084208 ISOSTRATE POWER SUPPLY 82 005410 CHASSIS SUPPORT REAR 83 070139 DIODE BRIDGE RECTIFIER 84 084207 THERMAL PAD 1.25 X 1.25 ALUMINUM 85 102006 NUT MACH 10-32 W/LOCK 86 005401 HEATSINK VENT 87 101176 SCREW TC 6-32 X 1/2 PH PN TYPE F 88 005065 ASSY INPUT PCB 89 088023 CIRCUIT BREAKER 10A 240VAC 90 117487 RECEPT ACLE AC LINE 91 100250 SCREW MACH SEMS 6-32 X 1/4 PH PN 92 101197 SCREW HI-LO 4-24 X 3/8 PH RD BLK 93 112015 STANDOFF 94 104004 WASHER LOCK 5 X .255 INT STAR 95 005400 BOTTOM COVER 96 017937 FOOT 97 100159 SCREW MACH 10-32 X 3/4 PH PN 98 101078 ST 8-32 X 5/16 PH PN 99 100173 MS 8-32 X 1/4 PH PN

45 46

REPACKING INSTRUCTION

MC207

POWER AMPLIFIER

SERVICE MANUAL

The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design without notice. Because of 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 040929

Q2 TRANSISTOR PNP 132224 Q3 TRANSISTOR NPN 132268 Q4 TRANSISTOR PNP 132267 Q5 TRANSISTOR NPN 132223 Q7 TRANSISTOR PNP 132286 Q8 TRANSISTOR PNP POWER 132299 Q9 TRANSISTOR NPN POWER 132298 Q1 0 TRANSISTOR PNP POWER 132299 Q1 1 TRANSISTOR NPN POWER 132298 Q1 2 TRANSISTOR NPN 132223 Q1 3 TRANSISTOR PNP 132224 Q1 4 TRANSISTOR NPN 132223 Q1 5 TRANSISTOR PNP 132286 Q1 6 TRANSISTOR NPN 132285 Q1 7 TRANSISTOR PNP 132267 Q1 8 TRANSISTOR NPN 132268 Q1 9 TRANSISTOR NPN POWER 132298 Q2 0 TRANSISTOR NPN POWER 132298 Q2 1 TRANSISTOR PNP POWER 132299 Q2 2 TRANSISTOR PNP POWER 132299 Q2 3 TRANSISTOR NPN POWER 132298 Q2 4 TRANSISTOR NPN POWER 132298 Q2 5 TRANSISTOR PNP POWER 132299 Q2 6 TRANSISTOR PNP POWER 132299 Q2 7 TRANSISTOR PNP 132224 Q2 8 TRANSISTOR SI NPN 25V 132254 Q2 9 TRANSISTOR PNP POWER 132255 Q3 0 TRANSISTOR SI NPN 25V 132254 Q3 1 TRANSISTOR NPN 132223 Q3 2 TRANSISTOR NPN 132223 Q3 3 TRANSISTOR PNP POWER 132255 Q3 4 TRANSISTOR NPN 132223 Q3 5 TRANSISTOR NPN 132223 Q3 6 TRANSISTOR NPN 132285 Q3 7 TRANSISTOR NPN 132285 Q3 8 TRANSISTOR PNP POWER 132255 Q3 9 TRANSISTOR PNP 132286 Q4 0 TRANSISTOR PNP 132224 Q4 1 TRANSISTOR PNP 132224 Q4 2 TRANSISTOR NPN 132223 Q4 3 TRANSISTOR PNP 132224 Q4 4 TRANSISTOR PNP POWER 132255 Q4 5 TRANSISTOR PNP POWER 132255 Q4 6 TRANSISTOR PNP 132224 Q4 7 TRANSISTOR SI NPN 25V 132254 Q4 8 TRANSISTOR PNP 132286 Q4 9 TRANSISTOR PNP 132224 Q5 0 TRANSISTOR NPN 132223 Q5 1 TRANSISTOR NPN 132223 Q5 2 TRANSISTOR NPN 132223 Q5 3 TRANSISTOR PNP POWER 132255 Q5 4 TRANSISTOR PNP 132224 Q5 5 TRANSISTOR PNP POWER 132255 Q5 6 TRANSISTOR PNP POWER 132255 Q5 7 TRANSISTOR SI NPN 25V 132254 Q5 8 TRANSISTOR NPN 132223 Q5 9 TRANSISTOR NPN 132223 Q6 0 TRANSISTOR SI NPN 25V 132254 Q6 1 TRANSISTOR SI NPN 25V 132254 Q6 2 TRANSISTOR PNP 132224 Q6 3 TRANSISTOR NPN 132223 Q6 4 TRANSISTOR PNP POWER 132255 R1 RES MF 332 OHM 1% 1/4W 144446 R2 RES MET OX 680 OHM 5% .5W 137093 R3 RES MF 22.1K 1% 1/4W 144187 R4 RES MF 100K 1% 1/4W 144113 R5 RES MF 22.1K 1% 1/4W 144187 R6 RES MET OX 1.8k 5% .5W 137094 R7 RES MET OX 430 OHM 5% .5W 137095 R8 RES MF 332 OHM 1% 1/4W 144446 R9 RES MET OX 680 OHM 5% .5W 137093 R1 0 RES MF 22.1K 1% 1/4W 144187 R1 1 RES MET OX 1.8k 5% .5W 137094 R1 2 RES MET OX 47 OHM 5% .5W 137096 R13 POT TRIM 200 OHM 20% HORIZ AD 134390 R1 4 RES MF 100K 1% 1/4W 144113 R1 5 RES MF 100 OHM 1% 1/4W 144196 R1 6 RES MF 100 OHM 1% 1/4W 144196 R1 7 RES MF 100 OHM 1% 1/4W 144196 R1 8 RES MET OX 47 OHM 5% .5W 137096 R1 9 RES MET OX 1.8k 5% .5W 137094 R2 0 RES MF 332 OHM 1% 1/4W 144446 R2 1 RES MF 22.1K 1% 1/4W 144187 R2 2 RES MET OX 680 OHM 5% .5W 137093 R2 3 RES MET OX 430 OHM 5% .5W 137095 R2 4 RES MET OX 680 OHM 5% .5W 137093 R2 5 RES MF 22.1K 1% 1/4W 144187 R2 6 RES MET OX 1.8k 5% .5W 137094 R2 7 RES MF 332 OHM 1% 1/4W 144446 R28 POT TRIM 200 OHM 20% HORIZ AD 134390 R2 9 RES MF 475K 1% 1/4W 144364 R3 0 RES MF 475K 1% 1/4W 144364

R3 1 RES MF 5.11K 1% 1/4W 144083 R3 2 RES MF 47.5K 1% 1/4W 144108 R3 3 RES MF 47.5K 1% 1/4W 144108 R3 4 RES MF 5.11K 1% 1/4W 144083 R3 5 RES MF 47.5K 1% 1/4W 144108 R3 6 RES 511 OHM 1% 1/4W 144123 R3 7 RES MF 681K 1% 1/4W 144443 R3 8 RES MF 866 OHM 1% 1/4W 144028 R3 9 RES MF 2.21 OHM 1/4W 1% 144378 R4 0 RES WW DUAL .47 OHM 5% 3W 139244 R4 1 RES WW DUAL .47 OHM 5% 3W 139244 R4 2 RES WW DUAL .47 OHM 5% 3W 139244 R4 3 RES WW DUAL .47 OHM 5% 3W 139244 R4 4 RES WW DUAL .47 OHM 5% 3W 139244 R4 5 RES WW DUAL .47 OHM 5% 3W 139244 R4 6 RES MF 4.75K 1% 1/4W 144097 R4 7 RES MF 4.75K 1% 1/4W 144097 R4 8 RES MF 100 OHM 1% 1/4W 144196 R4 9 RES MF 1.1K 1% 1/4W 144091 R5 0 RES MF 14.7K 1% 1/4W 144149 R5 1 RES MF 221 OHM 1% 1/4W 144172 R5 2 RES MF 267K 1% 1/4W 144118 R5 3 RES MF 221 OHM 1% 1/4W 144172 R5 4 RES MF 3.32K 1% 1/4W 144095 R5 5 RES MF 3.32K 1% 1/4W 144095 R5 6 RES MF 10K 1% 1/4W 144053 R5 7 RES MF 475K 1% 1/4W 144364 R5 8 RES MF 1.1K 1% 1/4W 144091 R5 9 RES MF 2.21 OHM 1/4W 1% 144378 R6 0 RES FP 22 OHM 1/4W 5% 137033 R6 1 RES MF 100 OHM 1% 1/4W 144196 R6 2 RES MF 22.1K 1% 1/4W 144187 R6 3 RES FP 22 OHM 1/4W 5% 137033 R6 4 RES MF 10K 1% 1/4W 144053 R6 5 RES MF 681K 1% 1/4W 144443 R6 6 RES MF 681K 1% 1/4W 144443 R6 7 RES MF 100 OHM 1% 1/4W 144196 R6 8 RES MF 475K 1% 1/4W 144364 R6 9 RES MF 22.1K 1% 1/4W 144187 R7 0 RES MF 100 OHM 1% 1/4W 144196 R7 1 RES MF 100 OHM 1% 1/4W 144196 R7 2 RES MF 100 OHM 1% 1/4W 144196 R7 3 RES MF 100 OHM 1% 1/4W 144196 R7 4 RES MF 100 OHM 1% 1/4W 144196 R7 5 RES MF 267K 1% 1/4W 144118 R7 6 RES MF 221 OHM 1% 1/4W 144172 R7 7 RES MF 1M 1/4W 144269 R7 8 RES MF 100 OHM 1% 1/4W 144196 R7 9 RES CF 10 OHM 5% 1/2W 141165 R8 0 RES CF 10 OHM 5% 1/2W 141165 R8 1 RES MF 100 OHM 1% 1/4W 144196 R8 2 RES MF 1M 1/4W 144269 R8 3 RES MF 10K 1% 1/4W 144053 R8 4 RES MF 47.5K 1% 1/4W 144108 R8 5 RES MF 1.1K 1% 1/4W 144091 R8 6 RES MF 4.75K 1% 1/4W 144097 R8 7 RES MF 14.7K 1% 1/4W 144149 R8 8 RES MF 12.1K 1% 1/4W 144154 R8 9 RES MF 953 OHM 1/4W 1% 144473 R9 0 RES MF 1.1K 1% 1/4W 144091 R9 1 RES MF 681K 1% 1/4W 144443 R9 2 RES MF 866 OHM 1% 1/4W 144028 R9 3 RES MF 4.75K 1% 1/4W 144097 R9 4 RES MF 47.5K 1% 1/4W 144108 R9 5 RES MF 1.1K 1% 1/4W 144091 R9 6 RES MF 3.32K 1% 1/4W 144095 R9 7 RES 511 OHM 1% 1/4W 144123 R9 8 RES MF 3.32K 1% 1/4W 144095 R9 9 RES MF 221 OHM 1% 1/4W 144172 R100 RES MF 1.1K 1% 1/4W 144091 R101 RES MF 953 OHM 1/4W 1% 144473 R102 RES MF 332K 1% 1/4W 144119 R103 RES MF 332K 1% 1/4W 144119 R104 RES MF 15K 1% 1/4W 144412 R105 RES MF 6.49K 1% 1/4W 144140 R106 RES MF 475 OHM 1% 1/4W 144086 R107 RES MF 475 OHM 1% 1/4W 144086 R108 RES MF 6.49K 1% 1/4W 144140 R109 RES CF 0 OHM 5% 1/4W 141389 R110 RES MET OX 430 OHM 5% .5W 137095 R111 RES MET OX 430 OHM 5% .5W 137095 R112 RES MF 1M 1/4W 144269 R113 RES CF 10 OHM 5% 1/2W 141165 R114 RES CF 10 OHM 5% 1/2W 141165 R115 RES MF 1M 1/4W 144269 R119 RES MO 4.7 OHM 1W 5% 144464 R120 RES MO 4.7 OHM 1W 5% 144464 R122 RES MF 47.5K 1% 1/4W 144108 R123 RES MF 22.1K 1% 1/4W 144187 R124 RES MF 47.5K 1% 1/4W 144108 RT 1 SENSOR THERMAL 144249 RT 2 SENSOR THERMAL 144249

POWER AMPLIFIER

SERVICE MANUAL ADDENDUM

HEATSINK 1-CHANNEL

* Denotes components on reverse or backside of PC Board.

MCINTOSH LABORATORY, INC., 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903 Printed in U.S.A.

050070 HEATSINK ASSEMBLY 050187

MC207.SMA01.040929 090204

A B

HEATSINK 2-CHANNEL

* Denotes components on reverse or backside of PC Board.

P AR TS LIST

Ref No. Description

050070 HEATSINK 1-CHANNEL PCB

C1 CAP ELECT 47UF 35V 066446

C2 CAP ELECT 47UF 35V 066446 C3 CAP MONO .1uF 50V 20% Z5U 061305 C4 CAP POLYPROP 0.15UF 10% 250VDC 064363 C7 CAP MONO 100PF 100V 10% NPO 061300 C8 CAP MONO 100PF 100V 10% NPO 061300 C9 CAP MONO .01UF 50V 20% X7R 061304 C14 CAP MONO 100PF 100V 10% NPO 061300 C1 6 CAP MONO .01UF 50V 20% X7R 061304 C22 CAP ELECT 220UF 25V 066507 C27 CAP MONO 100PF 100V 10% NPO 061300 C30 CAP ELECT 47UF 35V 066446 C31 CAP ELECT .47UF 50V 066244 C3 2 CAP MONO .1uF 50V 20% Z5U 061305 C3 3 CAP MONO .1uF 50V 20% Z5U 061305 C35 CAP ELECT 10UF 100VDC 066462 C36 CAP ELECT 10UF 100VDC 066462 C37 CAP ELECT 10UF 100VDC 066462

Part No

LD1 LDR NETWORK 144179 Q1 TRANSISTOR NPN 132223

050064 HEATSINK ASSEMBLY 050188

C38 CAP ELECT 10UF 100VDC 066462 C40 CAP ELECT 220UF 50V 20% 066254

C41 CAP ELECT 10UF 100VDC 066462 C47 CAP POLYPROP .047UF 10% 250VDC 064364 C51 CAP ELECT 10UF 100VDC 066462 C200 CAP ELECT 10UF 100VDC 066462 D1 DIODE SILICON 070047 D2 DIODE SILICON 070047 D4 DIODE SILICON 070047 D5 DIODE SILICON 070047 D6 DIODE RECTIFIER 070131 D7 DIODE RECTIFIER 070131 IC2 IC DUAL AMP 133259 J1 CONN MALE 9 POS FRICTION LOCK 117244 J2 CONN 4 PIN 117215 J4 CONN HEADER 2 PIN 0.156 117404 J5 BLADE FASTON .110 117712 J6 BLADE FASTON W/FEET 117708 J8 CONN HEADER 2 PIN 0.156 117404 J9 CONN 2 PIN MALE 117213 K1 RELAY 24VDC 5A 277VAC 087057 K2 RELAY 24VDC 5A 277VAC 087057 L2 CHOKE 0.65UH OUTPUT 122297

Q2 TRANSISTOR PNP 132224 Q3 TRANSISTOR NPN 132268 Q4 TRANSISTOR PNP 132267 Q5 TRANSISTOR NPN 132223 Q6 TRANSISTOR NPN 132285 Q7 TRANSISTOR PNP 132286 Q8 TRANSISTOR PNP POWER 132299 Q9 TRANSISTOR NPN POWER 132298 Q1 0 TRANSISTOR PNP POWER 132299 Q1 1 TRANSISTOR NPN POWER 132298 Q2 0 TRANSISTOR NPN POWER 132298 Q2 2 TRANSISTOR PNP POWER 132299 Q2 3 TRANSISTOR NPN POWER 132298 Q2 5 TRANSISTOR PNP POWER 132299 Q2 7 TRANSISTOR PNP 132224 Q2 9 TRANSISTOR PNP POWER 132255 Q3 0 TRANSISTOR SI NPN 25V 132254 Q3 1 TRANSISTOR NPN 132223 Q3 2 TRANSISTOR NPN 132223 Q3 3 TRANSISTOR PNP POWER 132255 Q3 5 TRANSISTOR NPN 132223 Q3 7 TRANSISTOR NPN 132285 Q3 9 TRANSISTOR PNP 132286 Q4 1 TRANSISTOR PNP 132224 Q4 9 TRANSISTOR PNP 132224 Q5 0 TRANSISTOR NPN 132223 Q5 1 TRANSISTOR NPN 132223 Q5 2 TRANSISTOR NPN 132223 Q5 3 TRANSISTOR PNP POWER 132255 Q5 4 TRANSISTOR PNP 132224 Q5 5 TRANSISTOR PNP POWER 132255 Q5 6 TRANSISTOR PNP POWER 132255 Q5 9 TRANSISTOR NPN 132223 Q6 0 TRANSISTOR SI NPN 25V 132254 Q6 1 TRANSISTOR SI NPN 25V 132254 Q6 3 TRANSISTOR NPN 132223 Q6 4 TRANSISTOR PNP POWER 132255 R1 RES MF 332 OHM 1% 1/4W 144446 R2 RES MET OX 680 OHM 5% .5W 137093 R3 RES MF 22.1K 1% 1/4W 144187 R4 RES MF 100K 1% 1/4W 144113 R5 RES MF 22.1K 1% 1/4W 144187 R6 RES MET OX 1.8k 5% .5W 137094 R7 RES MET OX 430 OHM 5% .5W 137095 R8 RES MF 332 OHM 1% 1/4W 144446 R9 RES MET OX 680 OHM 5% .5W 137093 R1 0 RES MF 22.1K 1% 1/4W 144187 R1 1 RES MET OX 1.8k 5% .5W 137094 R1 2 RES MET OX 47 OHM 5% .5W 137096 R13 POT TRIM 200 OHM 20% HORIZ AD 134390 R1 4 RES MF 100K 1% 1/4W 144113 R1 5 RES MF 100 OHM 1% 1/4W 144196 R1 6 RES MF 100 OHM 1% 1/4W 144196 R1 7 RES MF 100 OHM 1% 1/4W 144196 R3 0 RES MF 475K 1% 1/4W 144364 R3 2 RES MF 47.5K 1% 1/4W 144108 R3 3 RES MF 47.5K 1% 1/4W 144108 R3 4 RES MF 5.11K 1% 1/4W 144083 R3 6 RES 511 OHM 1% 1/4W 144123 R3 7 RES MF 681K 1% 1/4W 144443 R3 8 RES MF 866 OHM 1% 1/4W 144028 R3 9 RES MF 2.21 OHM 1/4W 1% 144378 R4 1 RES WW DUAL .47 OHM 5% 3W 139244 R4 2 RES WW DUAL .47 OHM 5% 3W 139244 R4 3 RES WW DUAL .47 OHM 5% 3W 139244 R4 5 RES WW DUAL .47 OHM 5% 3W 139244 R4 6 RES MF 4.75K 1% 1/4W 144097 R4 8 RES MF 100 OHM 1% 1/4W 144196 R5 0 RES MF 14.7K 1% 1/4W 144149 R5 1 RES MF 221 OHM 1% 1/4W 144172 R5 2 RES MF 267K 1% 1/4W 144118 R5 3 RES MF 221 OHM 1% 1/4W 144172 R5 4 RES MF 3.32K 1% 1/4W 144095 R5 5 RES MF 3.32K 1% 1/4W 144095 R5 6 RES MF 10K 1% 1/4W 144053 R5 7 RES MF 475K 1% 1/4W 144364 R5 8 RES MF 1.1K 1% 1/4W 144091 R5 9 RES MF 2.21 OHM 1/4W 1% 144378 R6 0 RES FP 22 OHM 1/4W 5% 137033 R6 2 RES MF 22.1K 1% 1/4W 144187 R6 3 RES FP 22 OHM 1/4W 5% 137033 R6 5 RES MF 681K 1% 1/4W 144443 R6 7 RES MF 100 OHM 1% 1/4W 144196 R7 0 RES MF 100 OHM 1% 1/4W 144196 R7 1 RES MF 100 OHM 1% 1/4W 144196 R7 2 RES MF 100 OHM 1% 1/4W 144196 R7 7 RES MF 1M 1/4W 144269 R7 9 RES CF 10 OHM 5% 1/2W 141165 R8 2 RES MF 1M 1/4W 144269

R8 3 RES MF 10K 1% 1/4W 144053 R8 4 RES MF 47.5K 1% 1/4W 144108 R8 5 RES MF 1.1K 1% 1/4W 144091 R8 6 RES MF 4.75K 1% 1/4W 144097 R8 8 RES MF 12.1K 1% 1/4W 144154 R9 0 RES MF 1.1K 1% 1/4W 144091 R9 3 RES MF 4.75K 1% 1/4W 144097 R101 RES MF 953 OHM 1/4W 1% 144473 R103 RES MF 332K 1% 1/4W 144119 R104 RES MF 15K 1% 1/4W 144412 R105 RES MF 6.49K 1% 1/4W 144140 R106 RES MF 475 OHM 1% 1/4W 144086 R109 RES CF 0 OHM 5% 1/4W 141389 R111 RES MET OX 430 OHM 5% .5W 137095 R114 RES CF 10 OHM 5% 1/2W 141165 R119 RES MO 4.7 OHM 1W 5% 144464 R122 RES MF 47.5K 1% 1/4W 144108 R123 RES MF 22.1K 1% 1/4W 144187 R124 RES MF 47.5K 1% 1/4W 144108 RT1 SENSOR THERMAL 144249 RT2 SENSOR THERMAL 144249

4A 4B

050064 HEATSINK 2-CHANNEL PCB

C1 CAP ELECT 47UF 35V 066446

C2 CAP ELECT 47UF 35V 066446 C3 CAP MONO .1uF 50V 20% Z5U 061305 C4 CAP POLYPROP 0.15UF 10% 250VDC 064363 C7 CAP MONO 100PF 100V 10% NPO 061300 C8 CAP MONO 100PF 100V 10% NPO 061300 C9 CAP MONO .01UF 50V 20% X7R 061304 C10 CAP ELECT 47UF 35V 066446 C11 CAP ELECT 47UF 35V 066446 C12 CAP MONO 100PF 100V 10% NPO 061300 C13 CAP MONO 100PF 100V 10% NPO 061300 C14 CAP MONO 100PF 100V 10% NPO 061300 C1 5 CAP MONO .1uF 50V 20% Z5U 061305 C1 6 CAP MONO .01UF 50V 20% X7R 061304 C1 7 CAP MONO .01UF 50V 20% X7R 061304 C1 8 CAP MONO .01UF 50V 20% X7R 061304 C19 CAP MONO 100PF 100V 10% NPO 061300 C22 CAP ELECT 220UF 25V 066507 C27 CAP MONO 100PF 100V 10% NPO 061300 C28 CAP MONO 100PF 100V 10% NPO 061300 C29 CAP ELECT 47UF 35V 066446 C30 CAP ELECT 47UF 35V 066446 C31 CAP ELECT .47UF 50V 066244 C3 2 CAP MONO .1uF 50V 20% Z5U 061305 C3 3 CAP MONO .1uF 50V 20% Z5U 061305 C35 CAP ELECT 10UF 100VDC 066462 C36 CAP ELECT 10UF 100VDC 066462 C37 CAP ELECT 10UF 100VDC 066462 C38 CAP ELECT 10UF 100VDC 066462 C39 CAP ELECT .47UF 50V 066244 C40 CAP ELECT 220UF 50V 20% 066254 C41 CAP ELECT 10UF 100VDC 066462 C44 CAP ELECT 220UF 25V 066507 C47 CAP POLYPROP .047UF 10% 250VDC 064364 C48 CAP POLYPROP .047UF 10% 250VDC 064364 C50 CAP ELECT 10UF 100VDC 066462 C51 CAP ELECT 10UF 100VDC 066462 C200 CAP ELECT 10UF 100VDC 066462 D1 DIODE SILICON 070047 D2 DIODE SILICON 070047 D4 DIODE SILICON 070047 D5 DIODE SILICON 070047 D6 DIODE RECTIFIER 070131 D7 DIODE RECTIFIER 070131 D8 DIODE SILICON 070047 D9 DIODE SILICON 070047 D1 1 DIODE SILICON 070047 D1 2 DIODE SILICON 070047 D1 3 DIODE RECTIFIER 070131 D1 4 DIODE RECTIFIER 070131 IC1 IC DUAL AMP 133259 IC2 IC DUAL AMP 133259 J1 CONN MALE 9 POS FRICTION LOCK 117244 J2 CONN 4 PIN 117215 J3 CONN HEADER 2 PIN 0.156 117404 J4 CONN HEADER 2 PIN 0.156 117404 J5 BLADE FASTON .110 117712 J6 BLADE FASTON W/FEET 117708 J8 CONN HEADER 2 PIN 0.156 117404 J9 CONN 2 PIN MALE 117213 J1 0 CONN 2 PIN MALE 117213 K1 RELAY 24VDC 5A 277VAC 087057 K2 RELAY 24VDC 5A 277VAC 087057 L1 CHOKE 0.65UH OUTPUT 122297 L2 CHOKE 0.65UH OUTPUT 122297 LD1 LDR NETWORK 144179 LD2 LDR NETWORK 144179 Q1 TRANSISTOR NPN 132223

McIntosh MC-207 Service manual

Specifications and Main Features

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User Manual