Bose Acoustimass 3 Series Manual - Page 23
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INTEGRATED CIRCUIT DIAGRAMS
14
13
12
11
NPN
1
2
3
4
A Output
A -Input
A +Input
_
V
10
9
8
5
6
7
Quad Transistor Array, NPN
P/N 145317 (MPQ3904)
Main PCB Assembly
U1
1
2
3
4
Dual Operational Amplifier, DIP-8
P/N 108568 (RC 4559)
Main PCB Assembly
U2, U3, U5, U6, U101-105
23
Pin
1
Collector
2
Base
3
Emitter
4
No Connection
5
Emitter
6
Base
7
Collector
8
Collector
9
Base
10
Emitter
11
No Connection
12
Emitter
13
Base
14
Collector
+
V
8
B Output
7
B -Input
6
B+Input
5