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4
AUDIO
751899 SCH 3 of 6
M ET EN A
J15:3
MET ENA
2
VOL CS
J15:4
VOL CS
2
VOL CL
J15:5
VOL CL
2
VOL DA
J15:6
VOL DA
2
J15:7
TON E CS
2
TONE CS
AU D DET
J15:8
AU D DET
2
I2C CL 2
J15:2
2
I2C CL 2
I2C DA 2
J15:1
2
I2C DA 2
C136
10µF
+5V
J15:16
2
+5 V
L INP
J15:17 J15:18
+3. 3VBU
J15:9
R147
R148
2
+3 .3V BU
4.75k
100k
J15:10
GND
J15:11
J15:13
2
J15:12
J15:14
J15:15
J16:1J16:2
2
+1 5V
J16:3
J16:5J16:6
2
-15V
J16:7
R INP
J16:10J16:11
2
J16:12 J16:9
R149
4.75k
C135
.47µF
D25
D26
R150
2.21M
C137
100pF
6
U14:2
5
R151
3.32k
31
C142
10µF
-15V
+1 5V
R156
R157
R158
R159
+5 V
C138
10µF
C139
+1 5V
-15V
.1µF
C140
C141
.1µF
.1µF
R152
100k
+3 .3V BU
+3 .3V BU
U15
1
Vc c
4
2
GN D
-15V
7
3
R155
Q37
3.32k
B-
1
1
U14:1
B+
2
+1 5V
R153
R154
3.32k
3.32k
AU DIO DET EC TOR
R269
4.75k
+7 .5V
D59
D60
D61
TONE CONTROL
D62
C214
R270
10µF
332
1
32
L VOL
InA
InB
2
31
GN D
GN D
C202
10µF
3
30
C207
10µF
-7.5V
SW CA
SW CB
4
29
L TONE
Out A
Out B
5
28
GN D
GN D
C201
.0022µF
6
27
Tr1A
Tr1B
C203
1µF
C209
7
26
M i1A
M i1B
8
25
M i2A
M i2B
R271
C204
.22µF
C208
.22µF
9
24
3.92k
Ba1A
Ba1B
10
23
Ba2A
Ba2B
11
22
NC
NC
12
21
GN D
NC
C205
100µF
13
20
-7.5V
VD Dout
V+
14
19
DAT A
V-
R277
22.1
15
18
CLOC K
AD R1
R272
1k
16
17
LAT CH
AD R0
R273
1k
U26
C206
220pF
VOLUM E CONTROL
No Pop
L VOL
C148
OPEN
32
1
Z/C
Z/C REF L
31
2
AD R0
L REF
30
3
5
AD R1
L+
29
4
7
AD R2
L REF
28
5
6
D CAP
L-
27
6
V-
L REF
U17:2
26
7
InL
Out L
25
8
V-
DCCAP L
C147
100µF
24
9
V+
DCCAP R
C146
100µF
23
10
+1 5V
InR
Out R
22
11
V+
R REF
U17:1
10k
21
12
2
D REF
R-
1k
B+
20
13
1
LAT CH
R REF
B-
1k
19
14
3
CLOC K
R+
18
15
DAT A
R REF
10k
17
16
D VD D
Z/C REF R
-15V
C149
OPEN
U16
R VOL
No Pop
R160
100k
+1 5V
-15V
C143
C144
C145
.47µF
.1µF
.1µF
R274
4.75k
-7.5V
D63
D64
C211
R275
10µF
332
R VOL
-7.5V
R TONE
C210
.0022µF
1µF
R276
3.92k
+7 .5V
-7.5V
C212
C213
.1µF
.1µF
+1 5V
-15V
C156
C157
.1µF
.1µF
C153
.47µF
J27:4
J27:9
3
x
L TONE
J27:3
J27:10
GND
U18:1
x
R165
2
221k
+1 5V
J27:7
NC
J27:8
J27:5
-15V
J27:6
NC
C154
.47µF
J27:1
J27:12
5
R TONE
x
J27:2
J27:11
U18:2
x
R166
6
221k
32
J17:7
+5 V
12
J17:6
J17:5
MAIN
12
-15V
J17:14
OUT 1
12
B-
1
B+
J17:13
OUT 2
12
+1 5V
J17:9
+1 5V
12
J17:8
J17:11
-15V
12
J17:10
J17:17
L OUT
12
J17:2
R OUT
12
J17:18
J17:16
A GN D
12
J17:3
J17:1
7
J18:12
R HDPH
R HDPH
5
GND
J18:11
5
A GN D
J18:10
GND
5
J18:9
L HDPH
L HDPH
5
J18:8
5
J18:7
5
J18:6
5
J18:5
5
J18:4
R M ET
R MET
5
J18:3
GN D
5
J18:2
GN D
5
J18:1
L M ET
L MET
5
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