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3.Audio Trouble
3.1 No Audio
Check audio signal input
N
N
Y
Check the
peripheral
audio
Reset
Check
devices
the
speaker
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No Audio
Y
Check the set of volume, mute
Check power U3 8th
N
Check U3 PIN4 and PIN6 for
N
Check U25/SM5964
Check
And U25 I/0 interface
U3 or
(PIN6,12)
E45/100
Y
Check signal from C11
N
U3/TPA1517NE PIN7
11.2V?
Y
Y
Check U3 PIN1 and PIN9 for signal input
N
Y
Chekc U21PIN60,61for signal output
signal output
N
Y
Check
input
audio
input
AV:U21 PIN49,50
PC下 U21PIN53 54
Examine
and
Y
N
repair
the
Check the
output
net
Check
net
between
U3
between
U21
and CN11
N
Y
Check
Check net
power
between
supply
U21
for U3
PIN60,61
And U3
PIN1,9
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