3.Audio Trouble
3.1 No Audio
No Audio
Check audio signal input
Check the
peripheral
audio
devices
U3/TPA1517NE PIN7
11.2V?
N
Y
Y
N
Check power U3 8th
Check
power
supply
for U3
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 U3 PIN1 and PIN9 for signal input
Y
N
Y
N
Check U3 PIN4 and PIN6 for
signal output
Chekc U21PIN60,61for signal output
Y
N
Check
U3 or
E45/100
Examine and
repair the
output net
between U3
and CN11
Check net
between
U21
PIN60,61
And U3
PIN1,9
Check input audio
input
AV:
U21 PIN49,50
PC
下
U21PIN53 54
Check
U21
Check the
net
between
Y
N
Y N
Summary of Contents for LV1913
Page 1: ...LV1913 ...
