Trouble Shooting
|
Audio Trouble
（
No sound
）
No Sound
Check if there is audio signal
input
Check
external Audio
equipment
Check power supply (>11V)on UA31
N
Y
Y
N
Check the voltage on pin No.1(>2.5V)
and No.14(≈0V) of UA31
Repair the
UA31 power
supply
Check the set of volume,
Mute is normal
Rest it
Check signal output
of UA31 is normal
Y
N
Check
external
speaker
N
Y
Repair the circuit
between U6 and UA31
or U6 is illness
Check the signal input
on pin3&12 of UA31
Y
N
Y
N
Check the circuit from
UA31 to CN9
or UA31 is damaged
Check the circuit from U6
to UA31 is normal
Y
Repair the circuit
from U6 to UA31
U6 is illness
N
Summary of Contents for L32D2710
Page 36: ......
