McIntosh C2500 Service Manual page 18

4 AUDIO
751458 SCH 1 of 5
C38
10µF
1 LEFT +
J2:1
1 4
J1:18
5
2 3
5.0v
R47
K1
221K
C39
10µF
1 LEFT - J2:2
J1:17 1 4
5
2 3
R48
K2
221K
C40
10µF
1 RIGHT +
J2:13
1 4
J1:6
5
2 3
R49
K3
221K D4
C41
10µF
1 RIGHT - J2:14
J1:5 1 4
5
2 3
R50
K4
221K
BAL1CONTROL
C42
10µF
2 LEFT + J2:5
1 4
J1:14 5
2 3
5.0v
R51
K5
221K
C43
10µF
2 LEFT - J2:6
1 4
J1:13
5
2 3
R52
K6
221K
C44
10µF
2 RIGHT +
J2:18
1 4
J1:1 5
2 3
R53
K7
221K
C45
10µF
2 RIGHT -
J2:17
1 4
J1:2
5
2 3
R54
K8
221K
D3
J1:16 GND J2:3
5
BAL2CONTROL
J1:15 GND J2:4
5
GND J2:7
J1:12
5
GND J2:8
J1:11 5
GND J2:9
J1:10
5
GND J2:10
J1:9 5
GND J2:11
J1:8
5
GND J2:12
5
J1:7
GND J2:15
J1:4
5
GND J2:16
J1:3
5
31
-15VBI
C70
C48
R59
10µF
20K 3
C79
10µF
C62 0V
C49 B- 1
R60
10µF 100pF BAL-L
20K B+
2
U9:1
R75
15VBI
C52
C71
R69
10k
C68
100pF
R72
2.21
15V 15VBI
C76
R73
10µF
2.21
-15V -15VBI
C50
R61
10µF
20K 5
C80
10µF
C63 0V
C51 7
R62
10µF 100pF BAL-R
20K
6
U9:2
R76
C53
R70
10k
C69
100pF
-15VL1
C105
10µF
3
L-MAIN C109
+ BALANCED AMP
0V
47µF
0V
B- 1
B+
2
U10:1
0V
R117
15VL1
LEFT
15VL1
MAIN
C113
UNBALANCED
TO ALANCED
AMP
-15VL1
C114
R111
5
4.99k
C110
- BALANCED AMP
0V
47µF
0V
7
6 U10:2
0V
R118
R115
4.99k
-15VR1
C106
10µF
3
C223
R-MAIN + BALANCED AMP
0V
47µF
0V
B- 1
B+
2
U11:1 R119
0V
15VR1
R121
2.21
RIGHT
15VR1
MAIN
C107
UNBALANCED
TO BALANCED
C115
AMP
R122
2.21
-15VR1
C108
5
- BALANCED AMP C112
0V
47µF
0V
7
6
0V U11:2
R120
R116
4.99k
L_MAIN+
K9
1 4
2 3
5v1
R129
4.99k 221K
R124 K10
2.21
1 4
15V
2 3
5v1
R125
221K
C116
R123
2.21
-15V
K11
1 4
L_MAIN-
2 3
5v1
R130
221K
K12
1 4
4.99k
2 3
5v1
R126
221K
OUTPUT2
OUTPUT1
K13
1 4
2 3
5v1
R131
221K
R_MAIN+
K14
1 4
RIGHT + 2 3
5v1
4.99k
R127
D19
221K
15V
K15
1 4
2 3
5v1
R132
221K
-15V
R_MAIN-
K16
1 4
2 3
RIGHT -
5v1
D20
4.99k R128
221K
32
C117
R133
47µF
221
C118
R134
47µF
221
J11:17 1 LEFT +
5 J2:2
J11:18 1 LEFT -
5 J2:1
J11:16
5 J2:3
J11:15
5 J2:4
C119
R135
47µF
221 J11:10
J2:9
5
J11:9
5 J2:10
J11:5 2 LEFT +
J2:14
5
C120
R136
47µF
221
J11:6 2 LEFT -
5 J2:13
J11:7
5 J2:12
J11:8
5 J2:11
C121
R137
47µF
221
C122
R138
47µF
221 1 RIGHT +
J11:13
J2:6
5
1 RIGHT -
J11:14
5 J2:5
C123
R139
47µF
221
J11:12
5 J2:7
J11:11
5 J2:8
2 RIGHT +
J11:1
J2:18
5
C124
R140
47µF
221 2 RIGHT -
J11:2
5 J2:17
J11:3
J2:16
5
J11:4
5 J2:15