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IC301
LC7822 (INPUT BOARD)
1 IN 2 3 OUT 4 5 IN 6 7 OUT MUTE 8
30 29 IN 28 27 OUT 26 25 IN 24 23 OUT + VOUT1 22 IN � VOUT1 21
CONTROL COMP1
9 IN 10 OUT VEE 11 12
LEVEL SHIFT
20 OUT 19 VDD
CE 13 DI 14 IN1
LATCH
18 RESET 17 S
CL 15
GND
SHIFT RESISTOR
16 VSS
IC501, IC601, IC701
uPC2581V (INPUT BOARD)
BIAS CIRCUIT
PROTECTOR REG DRIVE PRE DRIVE 4 5
MF1
PRE DRIVE 7 8
IN2
DRIVE
1
2
3
6
9
NF2
10
COMP2
11
12
13 14 15
VCC1 VCC2 VEE
� VOUT2
IC414, IC415, IC416
TC9299P (INPUT BOARD)
VSS 1
+ VOUT2
16 VDD
OUT 2 L-CH DATA LATCH CIRCUIT NC 4 R-CH DATA LATCH CIRCUIT
15 OUT
L-ch
IN 3
14 IN
R-ch
13 NC
A-GND 5
12 A-GND
CS1 6 SHIFT REGISTER (13bit) LEVEL GND 7 SHIFT CIRCUIT STROBE GENERATOR CIRCUIT CK 8 LEVEL SHIFT CIRCUIT
11 CS2
10 STB
9 DATA
MC-Service
� 63 �
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