Haier HLE20BB - Page 30

3.Audio Trouble
3.1 No Audio
No
Audio
Check audio signal input
Check the
peripheral
audio
devices
U20/TPA1517NE PIN7
11.2V?
N
Y
Y
N
Check
p
ower U20 PIN8≥9.2V ?
Check
power
supply
for
U20
Check the set of volume, mute
Reset
Check signal from C11
Y
N
Check
the
speaker
N
Y
Check U25/SM5964
And U25 I/0 interface
(PIN6,12)
Check U20 PIN1 and PIN9 for signal input
Y N
Y
N
Check U20 PIN4 and PIN6 for
signal output
Chekc U21PIN60,61for signal output
Y
N
Check
U20 or
E45/100
Examine and
repair the
output net
between
U
20
and CN11
Check net
between
U21
PIN60,61
And U20
PIN1,9
Check input audio input
AV: U21 PIN49,50
PC:U21PIN53,54
Check
U21
Check the net
between
audio input
and U21
Y
N
Y N
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