Haier HLE20BB Service Manual page 33

4.Function Trouble
4.1 TV
N
Check signal T1 PIN11
Y
Examine
Check the net between
and repair
T1 PIN11 and
RF device
U21 PIN24,25
;Power supply for U21
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TV can not search/No picture
Check RF signal input
Check voltage T1 PIN9 for 33V
Y
2
Check I C signal T1 PIN4,5
Y
N
Check voltage T1 PIN1 >1V
Y
N
Change
Examine and
T1/TDQ-6H3
repair
The circuit
Check voltage T1/TDQ-6H3PIN6 for 5V
Y
Check voltage T1 PIN3 for 0V
Y
N
N
2
Check I C net
Examine
(connect with
and repair
U25/SM5964
33V
PIN16,17
circuit
Y
N
N
Examine
Examine
and repair
and repair
The power
R267/0Ω
supply net