Sony HCD-HDX285 Service Manual page 68

HCD-HDX285/HDX287WC/HDX585/HDX587WC/HDX589W/HDX685/HDX686W
– POWER Board –
IC901 STR-F6138-LF1352 (US and Canadian models)
IC901 STR-F6168-LF1352 (240V AC area in E and Saudi Arabia models)
CURRENT
MIRROR
OVER
CURRENT
PROTECT
2
LOGIC
OVER
FEED
CURRENT
BACK
PROTECT
2
1
IC921 MR4020-7103
SOFT-DRIVE
CIRCUIT
Q
S
ZERO
ONDEAD
STANDBY
CURRENT
TIMER
CIRCUIT
DETECT
1
68
OSC
DELAY
DELAY
BOTTOM
SKIP
LOGIC
OVER
INH INH
CURRENT
2 1
PROTECT
1
SWITCHING
REGULATOR
BLOCK
2 3
OVERCURRENT
PROTECT
R
THRESHOLD
COMPARATOR
BURST MODE
OVERCURRENT
THRESHOLD
COMPARATOR
LATCH CIRCUIT
ON
RESET
TIMER
COMPARATOR
2 3
LATCH
OVER VOLTAGE THERMAL
PROTECT SHUT DOWN
INTERNAL BIAS
UNDER VOLTAGE
4
RESTART
TIMER
UNDERVOLTAGE
LOCKOUT
COMPARATOR
START-UP CIRCUIT
UNDERVOLTAGE
LOCKOUT
COMPARATOR
Q
R S
OVERVOLTAGE
THERMAL
PROTECT
SHUTDOWN
COMPARATOR
CIRCUIT
4
OVER LOAD
PROTECT
LOCK OUT
5
START-UP
CIRCUIT
7 9
5