Main Board - Sony HCD-XB66 Service Manual

– CD MOTOR Board –
IC201 TA8409S
STANDBY
BLOCK
HEAT
CUT OFF
BLOCK
2 3
1
VCC OUT2 NC
IN2
– MAIN Board –
IC281 µPC1237HA
OVER LOAD DET
OFFSET DET
LATCH/
AUTORESET
AC OFF
DET
1 2 3 4
IC1502 LB1641
T.S.D
MOTOR
DRIVE
2 3
1 4
4 5 6 7
VS
GND OUT1
V ON
CC
F/F
MUTE
V
CC
5 6 7 8
FWD/REV/STOP
CONTROL LOGIC
5 6 7 8
VREF
BLOCK
8
9
VREF IN1
IC901 LA5617
ON/OFF
VREF
ERROR
AMP
1 2 3 4
– AUDIO Board –
IC602 µPC1330HA
O.C.P
MOTOR
DRIVE
1
SW R1 GND
9 10
– 80 –
CURRENT CURRENT
ON/OFF
LIMITER LIMITER
VMUTE VCC
VCC
VREF
~ _ 1.8V
ERROR
5 6 7 8
INVERTER
COMPARATER
2 3 4 5 6 7
SW P1 CONT GND VCC
SW P2 GND
START
CIRCUIT
VREF
OVER HEAT
PROTECT
AMP
9 10
8 9
SW R2