Sony HCD-GRX20 - Front Board

34
IC252 74HC165
IC301 M62439SP
1
2 3
4
5 6 7 8
91016 15 14 13 12 11
CK
EFGHQH
D
C B A SERIAL
IN
CLOCK
INHIBIT
SHIFT/
LOAD
GND
QH
VCC
OUTPUT
QH
SERIAL
INPUTABCD
CLOCK
INHIBIT
SHIFT/
LOAD
CLOCK E F G H OUTPUT
QH
PARALLEL INPUTS
PARALLEL INPUTS
— FRONT BOARD —
IC602 BU2092
1
2 3
4
5 6 7 8 9
1016 15 14 13 12 11
CONTROL
CIRCUIT
12 BIT
SHIFT
REGISTER
12 BIT
STORAGE
REGISTER
OUTPUT
BUFFER
(OPEN DRAIN)
1718
VDD OE Q11 Q10 Q9 Q8 Q7 Q6 Q5
Q4 Q3 Q2 Q1 Q0
LCK
CLOCK
DATA
VSS
20 19
18 17 16 15 14 13 12
11
1
2
3
4 5 6
7
8
9
10
CONTROL
LOGIC
REC OUT SW
INPUT SW
MONAURAL SW
MUTE
VOLUME CONTROL
Low boost
High boost
REC OUT2 INA2 INB2 INC2 IND2 TONEH2 TONEL2 OUT2 Vss CONT
VDDGNDOUT1TONEL1TONEH1IND1INC1INB1INA1REC OUT1