Sony HCD-RXD2 Service Manual page 34

IC252 74HC165
IC301 M62439SP
REC OUT2
20
1
REC OUT1
— FRONT BOARD —
IC602 BU2092
18 17 16 15 14 13 12 11
12 BIT
CONTROL
SHIFT
CIRCUIT
REGISTER
12 BIT
STORAGE
REGISTER
1 2 3 4
PARALLEL INPUTS
CLOCK
INHIBIT
VCC D
16 15 14
CLOCK
D
INHIBIT
SHIFT/
LOAD
CK
E
2 3
1
SHIFT/ CLOCK E
LOAD
PARALLEL INPUTS
INA2 INB2 INC2 IND2
19 18 17 16
2 3 4 5
INA1 INB1 INC1 IND1
10
OUTPUT
BUFFER
(OPEN DRAIN)
5 6 7 8 9
— 46 —
SERIAL OUTPUT
C B A INPUT
13 12 11 10
C B A SERIAL
IN
QH
F G H QH
5 6 7
4
F G H OUTPUT
GND
QH
TONEH2 TONEL2 OUT2
15 14 13
6 7 8
TONEH1 TONEL1 OUT1
QH
9
8
Vss CONT
12 11
CONTROL
LOGIC
9 10
GND VDD