McIntosh MC462

35 36
HEATSINK 752164 SCH 2 of 2
7
3
NEG
POS
3
+ V AMP
LIM IT ER
CU R REN T
AD JU ST
1
BI AS [-]
- V AMP
.01µF
C23
806
R47
22µF
C20
.01µF
C22
D5
47.5k
R48
CU R REN T
OGND
LIM IT ER
1.8k
R52
BI AS
.1µF
C24
100pF
C25
2 1
3
Q26
1.5k
R71
1.5k
R70
BI AS [+]
R EC TIFIER
22µF
C21
806
R46
1.8k
R53
47.5k
R49
3
21
Q25
100pF
C26
500
13
2
CCW
R55
POS
OU TPU TS
POS
DR IVER
NEG
DR IVER
NEG
OU TPU TS
HS OU T
BIAS ADJUSTMENT
ADJUST R55
FOR 21-25mV DC
ACROSS J7
WITH NO INPUT SIGNAL
AND HEATSINKS COOL
NO CO N N ECTIO N
TE S T ON LY
+V AMP
-V AMP
DRV +
DRV -
HS OUT
D6
D7
D8
.6V
.6V
.6V
.6V
.6V
1.2V
1.8V
-.6V
-.6V
-.6V
-.6V
-.6V
-1. 2V
-1. 8V
W HT
AU TO F ORM ER
TRACKI NG
BI AS
THER M AL
1
23
Q27
2 3
1
Q28
0.5 5W
R58
0.5 5W
R60
0.5 5W
R62
0.5 5W
R64
0.5 5W
R66
0.5 5W
R67
0.5 5W
R65
0.5 5W
R63
0.5 5W
R59
0.5 5W
R61
3
1
2
Q22
3
1
2
Q24
3
1
2
Q23
32
1
Q29:1
54
Q29:2
32
1
Q31:1
54
Q31:2
32
1
Q33:1
32
1
Q35:1
5 4
Q35:2
3
2
1
Q37:1
54
Q37:2
3 2
1
Q30:1
54
Q30:2
3 2
1
Q32:1
54
Q32:2
3 2
1
Q34:1
5 4
Q34:2
3 2
1
Q36:1
5 4
Q36:2
3 2
1
Q38:1
54
Q38:2
MP1
MP2
MP3
MP4
MP5
MP6
MP7
MP8
MP9
MP10
MP11
MP12
.47µF
C27
D9
J5:1
J5:2
680
R50
430
R51
680
R54
47
R57
1.8k
R56
J4:1
J4:2
.47µF
C18
.47µF
C29
.47µF
C19
.47µF
C28
1
R42
1
R43
6-32 X 7/16
MP15
6-32 X 7/16
MP16
6-32 X 7/16
MP17
6-32 X 7/16
MP18
ISO 5.700 X 1.010
ISO1
ISO 5.700 X 1.010
ISO2
10
R74
5.75 in
HS1
VI O
J6