Trouble Shooting - Haier HLE20BB Service Manual

Trouble shooting

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