Adcom GTP-740 Service Manual page 26

IC BLOCK DIAGRAM
AUDIO ASSEMBLY
U401: TC9163AN
L-S1
L-S2
L-S3
L-COM1
L-S4
L-S5
L-S6
L-COM2
L-S7 10
L-S8 11
L-COM3 12
L-ST 13
AUDIO ASSEMBLY
U402, U411: TC9164AN
L-S1 2
L-S2 3
L-S3 4
L-S4 5
L-COM1 6
L-S5 7
L-S6 8
L-COM2 9
L-S7 10
L-S8 11
L-COM3 12
L-ST 13
AUDIO ASSEMBLY
U426, U427: 7805
AMPLIFIER 1
OUTPUT 1
INVERTING
2
INPUT
– +
NON-INVERTING
3
INPUT
4
V –
VSS GND
1 14
2
3
4
5
6
7
8
9
SHIFT REGISTER
VSS GND
1 14
SHIFT REGISTER
AMPLIFIER 2
8
V +
7
OUTPUT
+ –
INVERTING
6
INPUT
NON-INVERTING
5
INPUT
VDD
28
27 R-S1
26 R-S2
25 R-S3
24 R-COM1
23 R-S4
22 R-S5
21 R-S6
20 R-COM2
19 R-S7
18 R-S8
17 R-COM3
16 DATA
15 CK
VDD
28
27 R-S1
26 R-S2
25 R-S3
24 R-S4
23 R-COM1
22 R-S5
21 R-S6
20 R-COM2
19 R-S7
18 R-S8
17 R-COM3
16 DATA
15 CK
AUDIO ASSEMBLY
U404-U408, U412, U418, U422-U425:
AD712
AMPLIFIER NO.1
OUTPUT 1
INVERTING
2
OUTPUT
NONINVERTING
3
OUTPUT
V- 4
26
GTP-740
AMPLIFIER NO.2
8 V+
OUTPUT
7
– + + –
INVERTING
6
INPUT
NONINVERTING
5
INPUT
AD712