Haier HLE20BB - Page 28

2.2 White
White Screen
Check signal output of U5/RTD2023B
Check voltage between
U25/SM5964 Q24 PIN3 or
check U25
Check voltage of Q24
Turn to power suppy
trouble shorting
Check LCD or
Panel Connector
Check U5
1,Power supply
2,Time circuit
Check Q23 0~3.3V（5V or 12V），according to the volitage）
N
Y
Check
p
ower su
pp
l
y
(
for
p
anel
)
Check voltage of Q23
Check Q23（be care
f
o
r
t
h
e
s
h
o
r
t
in
g
）
Check circuit between
CN8 and CN9
N
N
N
N
Y
Y
Y
Y
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