Haier HLE20BB - Trouble Shooting

Trouble shooting
1.Power Supply Trouble
Check F1 for 12V
Check F1 and CN13 Check E33
(
470μF/25V
)
for 5v
Check F1 for shortcut
Check power output for
LDO
OK
Turn on or not
Check the power
supply net follow
Turn on
the set
Change LDO
Or The load is in
shorted
OK
Check Pin3 U13
For 350Khz
switch si
g
nal
U13/MP1410ES &
D17/IN5822
Check L9/47μH
Higt Voltage
Low voltage
U13/MP1410ES PIN5
& U13
Check C111/0.01F
Y
N
Y
N
N Y
Y
N Y
N
Y N
NY
OK
Check Mcu
1,power supply
2,Reset
3
,
Cr
y
stal
N
Y
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