Front Board; Amp Board - Sony HCD-DR3 Service Manual

FRONT BOARD

IC602 BU2092F-E2
18
12 BIT
CONTROL
SHIFT
CIRCUIT
REGISTER
12 BIT
STORAGE
REGISTER
1 2 3 4
IC606 SN74HC161
VCC
16 15 14 13
RIPPLE QA QB
CARRY
OUTPUT
CLEAR
CK
A B
1 2 3 4

AMP BOARD

IC702
1
32
17 16 15 14 13 12 11 10
OUTPUT
BUFFER
(OPEN DRAIN)
5 6 7 8 9
12 11 10 9
QC QD ENABLE
T
LOAD
ENABLE
C D P
5 6 7 8
GND
MPC1237HA
OVER LOAD DET
OFFSET DET
LATCH/
AUTORESET
2 3
IC603 BU2114F
SIN
1
CK
2
3
LATCH
SOUT 4
EN 5
ENABLE
RST
6
GND 7
GND 8
V ON
CC
F/F
MUTE
AC OFF
DET
4 5 6 7
18
17
16
SHIFT
REGISTER
15
LATCH 14
13
12
11
10
V
CC
8
VDD
O1
O2
O3
O4
O5
O6
O7
O8
9 GND