McIntosh C49 - Operating the McIntosh C49; Power OnOff and Source Selection; Volume, Balance, and Trim Adjustments

M O N O
D AC
Q 3
7
VSS
8
Q 1
5
A1
2
A2
3
Q 4
9
Q 5
10
Q 7
12
SD A
15
SC L
14
Q 2
6
A0
1
Q 0
4
Q 6
11
VD D
16
N C
13
U23
+3 .3V BU
.1µF
C1 79
+3 .3V BU +3 .3V BU
B A L 1
B A L 2
I2 C C L 2
I2 C D A 2
U NB A L 1
M M M C
Q 3
7
VSS
8
Q 1
5
A1
2
A2
3
Q 4
9
Q 5
10
Q 7
12
SD A
15
SC L
14
Q 2
6
A0
1
Q 0
4
Q 6
11
VD D
16
N C
13
U20
+3 .3V BU
.1µF
C1 77
+3 .3V BU
+3 .3V BU
I2 C C L 2
I2 C D A 2
Q3
7
VSS
8
Q
1
5
A1
2
A2
3
Q4
9
Q5
10
Q7
12
SDA
15
SCL
14
Q2
6
A0
1
Q
0
4
Q6
11
VDD
16
NC
13
U21
+3 .3V BU
3
1
2
Q 5 1
1 k
R2 07
3
1
2
Q 4 9
3
1
2
Q 5 2
5 .62 k
R2 08
1 .5 k
R2 04
3
1
2
Q 4 8
2 2.1 k
R21 5
1 .5 k
R20 5
.1µF
C178
+3 .3V BU
I2C C L 2
I2C D A 2
H D PH
O UT 2
M AIN
3
1
2
Q 5 9
3
1
2
Q 5 8
3.32 k
R216
5.62 k
R218
A = 1 0 1 (5 )
T O N E
A = 1 1 0 (6 )
+5 V
+5 V
+5 V
+5 V
+5 V
A =100 (4 )
H X D
U NB A L 2
U NB A L 3
O UT 1
10 0 k
R2 17
+5 V
4
2
1
3
V c c
G N D
5
U22
+5 V
3
1
2
Q 4 6
5 .62 k
R2 02
+5 V
3
1
2
Q 5 0
5 .62 k
R2 06
+5 V
3
1
2
Q 4 7
5 .62 k
R2 03
+5 V
3
1
2
Q 6 0
3 .32 k
R2 19
3
1
2
Q 6 1
3 .32 k
R2 20
3
1
2
Q 5 5
5 .62 k
R2 13
3
1
2
Q 5 6
5 .62 k
R2 14
+5 V
+5 V
3
1
2
Q 5 3
5 .62 k
R 2 1 1
+5 V
+5 V
+5 V
3
1
2
Q 5 7
10 0 k
R2 77
+5 V
4
2
1
3
V c c
G N D
5
U220
+5 V
35 36
AUDIO 752349 SCH 6 of 6
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