McIntosh C2600 Service Manual page 21

4 AUDIO
751899 SCH 6 of 6
+5 V
R202
5.62k
1
Q46
1 1
Q47 Q50
R203 R206
5.62k 5.62k
+5 V +5 V
+5 V
R207
1k
1
Q51
+5 V
R204
1.5k
1
Q49
1 1
Q48 Q52
R205 R208
1.5k 5.62k
+5 V +5 V
+5 V
R211
5.62k
1
+3 .3V BU
+3 .3V BU +3 .3V BU
U20
1 16
A0 VDD
2 15
A1 SDA I2C DA 2
3 14
A2 SCL I2C CL 2
4 13
Q0 NC
5 12
Q1 Q7
6 11
Q2 Q6
7 10
Q3 Q5
8 9
VSS Q4
A = 1 1 0 (6)
1
R212
5.62k
+5 V
+3 .3V BU +3 .3V BU
C178 U21
.1µF
1 16
A0 VDD
2 15
A1 SDA
I2C DA 2
3 14
A2 SCL I2C CL 2
4 13
Q0 NC
5 12
Q1 Q7
6 11
Q2 Q6
7 10
Q3 Q5
8 9
VSS Q4
A = 1 0 0 (4)
37
C2600
Q53
+5 V
R213
5.62k
1
Q55
1
Q54 Q56
R214
5.62k
+5 V
+5 V
R215
22.1k
1
Q57
+5 V
R217
100k
+5 V
U22
1
Vc c
4
2
G N D
+5 V
R252
EQ control not used
100k
+3 .3V BU
+5 V
R219
3.32k
1
Q60
1 1
Q61 Q62
R220 R221
3.32k 3.32k
+5 V +5 V
1
Q59
38
+3 .3V BU +3 .3V BU
U23
1 16
A0 VDD
2 15
A1 SDA I2C DA 2
3 14
A2 SCL I2C CL 2
4 13
Q0 NC
5 12
Q1 Q7
6 11
Q2 Q6
7 10
Q3 Q5
8 9
VSS Q4
A = 1 0 1 (5)