McIntosh C49

31 32
AUDIO 752349 SCH 4 of 6
4
100k
R152
100k
R148
10µFC142
.1µF
C141
.1µF
C140
100µFC147
10µF
C154
.1µF
C157
10µF
C138
10µF
C136
100µF
C146
10µF
C153
1k
R158
1k
R157
10µF
C150
J15:4
J15:5
J15:3
J15:7
J15:11
J15:12
+5 V
.1µF
C156
I2C CL 2
I2C DA 2
+3 .3V BU
CO NTR O L
J15:1
J15:2
J15:9
+5 V
+1 5V
-1 5V
+1 5V -1 5V
22.1k
R166
22.1k
R165
L INP
R INP
L OUT
+5 V
+1 5V
-1 5V
VOLUM E CONTR OL
2
3
1
8 4
B+
B-
U18:1
6
5
7
U18:2
3
2
1
84
B+
B-
U17:1
5
6
7
U17:2
-1 5V
+1 5V
10k
R159
47pF
C149
47pF
C148
2k
R167
2k
R169
100k
R161
23
14
5
K14
D27
R VOL
L VOL
100k
R162
10kR156
.1µF
C139
10µF
C152
100k
R164
10µF
C155
100k
R163
10µF
C151
+1 5V
-1 5V
4.75k
R147
4.75k
R149
.47µF
C135
D25
D26
2.21M
R150
3.32k
R151
3.32k
R155
3
1
2
Q37
2
3
1
8 4
B+
B-
U14:1
6
5
7
U14:2
.47µF
C143
AUD IO D ETECTOR
.1µF
C144
.1µF
C145
+1 5V -1 5V
100pF
C137
+3 .3V BU
4
2
1
3
Vcc
GND
5
U15
+3 .3V BU
100k
R160
3.32k
R153
R OUT
VOL C S
D R EF
21
V+
22
V+
24
V-
25
InL
26
V-
27
D C AP
28
AD R2
29
AD R1
30
AD R0
31
Z/C
32
Z/C REF L
1
L R EF
2
L+
3
L R EF
4
L-
5
L R EF
6
Out L
7
DC C AP L
8
DC C AP R
9
Out R
10
R R EF
11
R-
12
R R EF
13
R+
14
R R EF
15
Z/C REF R
16
DVD D
17
DAT A
18
CLOCK
19
LATCH
20
InR
23
U16
J15:6
AUD D ET
TONE
23
14
5
K15
2k
R170
2k
R168
J15:10
AUD D ET
+3. 3VBU
I2C C L 2
VOL C S
+5V
GN D
VOL D A
VOL C L
I2C D A 2
-1 5V+1 5V
J15:8
3.32k
R154
TONE CS
TONE C S
J15:13
J15:14
J15:15
J15:16
J15:17 J15:18
+1 5V
-1 5V
J16:1J16:2
J16:3
J16:5 J16:6
J16:7
J16:10 J16:11
J16:12
CO NTR O L
J16:9
L TONE
R TONE
VOL CL
VOL DA
10µF
C207
-7 .5V
10µFC202
-7 .5V
1µFC203 1µFC209
-7 .5V
+7 .5V
100µFC205
-7 .5V
.22µFC208.22µFC204
10µF
C211
10µF
C214
3.92k
R271
3.92k
R276
TONE CONTROL
1k
R273
1k
R272
220pF
C206
.1µF
C213
.1µF
C212
NC
21
NC
22
Ba1B
24
M i2B
25
M i1B
26
Tr1B
27
GND
28
OutB
29
SWCB
30
GND
31
InB
32
InA
1
GND
2
SWCA
3
OutA
4
GND
5
Tr1A
6
M i1A
7
M i2A
8
Ba1A
9
Ba2A
10
NC
11
GND
12
VD Dout
13
DAT A
14
CLOCK
15
LATC H
16
ADR0
17
ADR1
18
V-
19
V+
20
Ba2B
23
U26
L VOL R VOL
L TONE R TONE
D34 D35
332
R270
D36 D37
332
R275
4.75k
R269
D33
+7 .5V
4.75k
R274
D38
-7 .5V
.0022µFC201
.0022µF
C210
2
2
2
2
2
2
2
2
2
2
2
2
2
1000pF
C215
1000pF
C216
DAC LEFT
DAC RIGHT
2
2
2
2
+7 .5V
-7 .5V
OPEN
C221
OPEN
C222
OPEN
C223
OPEN
C224