Hisense LHD32D33EU - Audio Troubleshooting (No Sound)

5.3.6. Audio Troubleshooting (no sound )
No soun
d
N
Chec
k
if audio signal
Input is normal
Y
Repai
r
external
audio equipment
N
Chec
k
if the volume is rightly set o
r
if
mute function is off
Y
Change the powe
r
Setitrightly
N
Chec
k
if the output signal on the
Pin18/20 & Pin23/25 of UA1 is normal
N
Chec
k
if the powe
r
of UA1 is OK?
Y
Chec
k
if the audio signal input to
UA1 is Ok
N
Chec
k
the audio circuit
b
etween
the U1 and UA1.
Y
Y
Repai
r
the
speaker
Chec
k
if the UA1 is
damaged?