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IC8 (SLA4391) internal diagram
SPM2 A
SPM2-A
SPM2 B
SPM2-B
PAM1 /A
PAM1 /B
PAM1 A
PAM1 B
VB
COM
9
I1
1
I2
2
I3
3
I4
4
I5
5
I6
6
I7
7
GND
8
O7
16
O6
15
O5
14
O4
13
O3
12
O2
11
O1
10
IC2
uLN2003A
VH
D15
1SS133
R20
10KJ
1/4W
CNB-13
CNB-11
CNB-9
CNB-7
VH
R17
24KJ
VH
R18
2.7KJ
R19
10KJ
Q1
2SC1740S
R28
2.7KJ
R29
10KJ
Q3
2SC1740S
R27
24KJ
R21
2.7KJ
R22
10KJ
R31
10KJ
R30
2.7KJ
D16
1SS133
Q4
2SC1740S
Q2
2SC1740S
6.2KJ
1/2Wx2
R6
1
5
8
IC8
SLA4391
R23
2KJ
R26
2KJ
R24
2KJ
R3
8.2KJ 1/2W
R25
2KJ
R5
3
10
2
4
9
11
VCC
VCC
SIG1
SIG2
SIG3
OUT1
OUT2
OUT3
OUT4
VH
F1
D20
RK14
D19
RK14
D18
RK14
C29
10000pF
CNB-17
CNB-15
D17
RK14
125V 1.6A
250V T1.6A
R14
10KJ
R2
0.22J/1W
12
R4
8.2KJ 1/2W
VD
C27
22000pF
R13
10KJ
C8
10uF/35V
C26
10000pF
6
7
SIG4
VDD
VDD
R15
30KF
R16
1.5KF
VD
3
2
1
8
4
IC7A
LM393F
DDM_DIR
DDM_PWM
M
R3 R4
R1 R2
5
1
A
C
B
D
6
7
4
9
2
11
3
10
12
8
VH
GND
12 – 21