Power Supply Board Failure Check - Haier HL26R1 Service Manual

Horiaontal/vertical
picture shaking
Television out of control

9-2. Power Supply Board failure check.

N
Check F1 and peripheral power supply
F1 is damaged？
N Y
Check power
supply net
OK
follow F1
bars or Check for local interference such as an electrical appliance or
power tool.
Disconnect the television from power supply and 10 seconds
later, connect the television to the power supply. If the problem
still exists, contact authorized after-sales service for technical
assistance.
Check (F1/3A) for 12V？
Turn on the TV-set(By button or
remote control)
N
Check U6/MCU
1:Power supply(U7、U9))
2:Reset signal
3:Crystal
N
Change U1/MP1410ES-LF or
D17/SK34A-SMA
Check E33/470μF/16V for 5V
N
Y
Check U1 for 5V
output
Check L9/47μH
It's normal but the
voltage is high
Check Pin No.4 of
U1/MP1410-ES or
change U1
44
Y
Were those
LDO(U10,U13,U16,U18,U19,
etc.)worked normal?
N
LDO was damaged
or the loader is in
short circuit
Y
It's normal but the
voltage is Low
E33 was damaged
or the loader is in
short circuit
Y
Y
OK