Check (F1/3A) for 12V？
Check F1 and peripheral power supply
Check E33/470μF/16V for 5V
F1 is damaged？
Were those
LDO(U10,U13,U16,U18,U19,
etc.)worked normal?
OK
Turn on the TV-set(By button or
remote control)
Check power
supply net
follow F1
Check U6/MCU
1:Power supply(U7、U9))
2:Reset signal
3:Crystal
LDO was damaged
or the loader is in
short circuit
OK
Check U1 for 5V
output
Change U1/MP1410ES-LF or
D17/SK34A-SMA
Check L9/47
μ
H
It’s normal but the
voltage is high
It’s normal but the
voltage is Low
Check Pin No.4 of
U1/MP1410-ES or
change U1
E33 was damaged
or the loader is in
short circuit
Y
N
Y
N
N
Y
Y
N
Y
N
Y
N
9-2. Power Supply Board failure check.
Summary of Contents for HL22FEP1
Page 13: ...13 ...
Page 43: ...5 8 6 Backlight Backlight adjust the backlight 8 7 Function ...
