Sony HCD-HDX277WC Service Manual page 73

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3 7 63 1515 0
– POWER Board –
IC901 STR-F6138-LF1352
IC901 STR-F6168-LF1352
CURRENT
MIRROR
OVER
FEED
CURRENT
PROTECT BACK
2
1
TE
L 13942296513
IC921 MR4020-7103
SOFT-DRIVE
S
www
ZERO
ONDEAD
CURRENT
TIMER
DETECT
.
1
http://www.xiaoyu163.com
HCD-HDX275/HDX277WC/HDX279W/HDX475/HDX576WF/HDX675
OSC
OVER
BOTTOM
CURRENT
PROTECT
SKIP
2
LOGIC
LOGIC
OVER
INH INH
CURRENT
2 1 PROTECT
1
2
CIRCUIT
Q
OVERCURRENT
PROTECT
R
THRESHOLD
COMPARATOR
BURST MODE
OVERCURRENT
THRESHOLD
COMPARATOR
ON
STANDBY
TIMER
CIRCUIT
x ao
y
i
2
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8
DELAY LATCH
DELAY
OVER VOLTAGE THERMAL
SHUT DOWN
PROTECT
SWITCHING
REGULATOR
BLOCK
Q Q
3 4
3 6 7 1 3
RESTART
TIMER
UNDERVOLTAGE
LOCKOUT
COMPARATOR
START-UP CIRCUIT
UNDERVOLTAGE
LOCKOUT
COMPARATOR
Q
S
R
LATCH CIRCUIT
OVERVOLTAGE
RESET PROTECT
COMPARATOR
COMPARATOR
u163
.
3 4
2 9 9 4 2 8
OVER LOAD
PROTECT
INTERNAL BIAS
UNDER VOLTAGE
LOCK OUT
5
1 5 0 5 8 2 9 9 4
START-UP
CIRCUIT
m
THERMAL
SHUTDOWN
CIRCUIT
co
5 7 9
9 9
2 8 9 9
73