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Circuit Diagrams and PWB Layouts
Small Signal Board (AB): Audio I/O
1
2
AUDIO I/O
B14D
A
B
7I17
TEA6422D
25
24
23
20
19
18
R1
R2
R3
R4
R5
R6
+8V
3
VS
C
II72
2
CAP
SUPPLY
BUS DECODER
1
GND
7
8
NC
21
22
L1
L2
L3
L4
L5
L6
D
4
5
6
9
10
11
E
RES
F
7I18
TEA6422D
25
24
23
20
19
18
R1
R2
R3
R4
R5
R6
+8V
G
3 VS
II71
2 CAP
SUPPLY
BUS DECODER
1 GND
7
H
8
21
NC
22
L1
L2
L3
L4
L5
L6
4
5
6
9
10
11
I
8204 000 8302.7
1
2
FTL13U AA & AB
3
4
5
6
MATRIX SWITCH
B6a,B14d
9I32
SNDR-MAIN-IN
ROUT1
ROUT1
13
B6a,B14d
9I33
SNDR-SEC-IN
ROUT2 15
ROUT2
B14b
9I34
SNDR-BO-IN
ROUT3 17
ROUT3
3IJ0
SDA 28
S-SDA
100R
3IJ1
SCL 27
S-SCL
100R
ADDR 26
B6a,B14d
9I35
SNDL-MAIN-IN
LOUT1 12
LOUT1
B6a,B14d
9I36
SNDL-SEC-IN
LOUT2
14
LOUT2
B14d
LOUT3 16
9I37
SNDL-BO-IN
LOUT3
MATRIX SWITCH
FID2
B6a , B14d
ROUT1
13
SNDR-MAIN-IN
FID3
B6a
ROUT2
15
SNDR-SEC-IN
B14b
ROUT3
17
SNDR-BO-IN
3II8
SDA
28
S-SDA
100R
3II9
SCL
27
S-SCL
100R
ADDR
26
FID4
B6a
LOUT1
12
SNDL-MAIN-IN
B6a
FID5
LOUT2
14
SNDL-SEC-IN
B14b
LOUT3
16
SNDL-BO-IN
3
4
5
6
7.
96
7
8
9
RES
B1 --> B20
B6a
SUBW-SPI-SW
+5V
II73
3IT7
10R
7I00
B6b
SPDIF-IN1
9I59
3IR8
220R
B14b
SNDL-SC2-OUT
3II1
B6a
REG-SW
22K
B14b
SNDR-SC2-OUT
RES
SEL_IN_2_B
B14b
II69
SEL_IN_2_F
3IJ3
B6c
22K
SEL_IN_1_B
B14b
II70
SEL_IN_1_F
3II7
B6c
22K
7
8
9
10
11
12
B14D
+8V
RES
3IH9
SNDL-SC1-OUT
47K
II65
SNDL-SC1-OUT-DC
3IH5
7I22-A
SNDR-SC1-OUT-DC
BC847BS
22K
3II4
SNDR-SC1-OUT
47K
BC847BW
3IR4
22K
100n
2IH2
+8V
3IR1
2IA0
100K
7I20
16
1u
74HC4053
6
VCC
II66
G3
+8V
3IR0
100K
14
MUXDX
II68
12
2IH0
1y0
11
2IH1
13
100n
1y1
3IR7
100n
15
II67
75R
2
7I22-B
2y0
10
SNDL-MON-OUT
BC847BS
1
SNDL-SC1-OUT-DC
2y1
4
5
9
SNDR-MON-OUT
3y0
2IA1
3
SNDR-SC1-OUT-DC
3y1
1u
GND
VEE
8
7
9I57
9I58
+5V
7I23-B
BC847BS
+5V
7I23-A
BC847BS
B1 --> B20
10
11
12
2I71 B2
2I72 B2
2I73 B2
2I74 B2
2I75 B2
2I76 B3
2I77 C1
2I78 C1
2I79 C1
B14b,d
2I80 D2
2I81 D2
B6a , B14d
A
2I82 D2
B6a , B14d
2I83 D2
2I84 D2
2I85 D3
2I86 F2
B14b,d
2I87 F2
2I88 F2
2I89 F2
2I90 F2
2I91 H1
2I92 H1
2I93 H1
B
2I94 I2
2I95 I2
2I96 I2
2I97 I2
2I98 I2
2I99 A11
2IA0 B9
2IA1 D9
2IA2 A12
B14b
2IA3 B9
SPI-1
2IA7 A11
B14b
SPI-2
2IF0 I3
C
2IF1 F3
2IH0 C12
B6a
2IH1 C12
B6a , B14d
2IH2 B12
3IH5 A9
3IH6 A10
3IH7 A10
3IH8 B9
B6a
3IH9 A11
3II0 C10
B6a , B14d
3II1 C9
D
3II2 C9
3II3 D9
3II4 A11
3II5 G9
3II6 H9
3II7 H9
3II8 G4
3II9 G4
3IJ0 C4
3IJ1 C4
3IJ2 F9
3IJ3 F9
E
3IJ4 G9
3IR0 C12
3IR1 B12
3IR2 B11
3IR3 B11
3IR4 B12
3IR6 C12
3IR7 C12
3IR8 B9
3IT7 A8
7I00 B9
7I17 B1
F
7I18 F1
7I20 B11
7I22-A A10
7I22-B C10
7I23-A H9
7I23-B F9
9I32 B4
9I33 B4
9I34 C4
9I35 C4
9I36 D4
G
9I37 D4
9I57 D11
9I58 E11
9I59 B9
FID2 G4
FID3 G4
FID4 H4
FID5 H4
II65 A10
II66 C12
II67 C9
II68 C11
H
II69 F9
II70 H9
II71 G1
II72 C1
II73 A9
I
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