Hitachi L32S02A Service Manual page 32

Troubleshooting
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TV has picture
but no sound
Press "Mute"function or
adjust volume up to check
the sound be mute or not
OK
Check speaker
unit 7~9
OK
Check CN8-Pin1
&Pin2=22~24V
OK
Check U33-Pin13
&Pin18=22~24V
OK
Check U31-Pin2=3.3V
OK
Check U32-Pin2=1.8V
NG
Check U25-Pin1=8V
END
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NG
Change speaker unit
NG
Change power
board assembly
NG
Change main
board assembly
NG Change main
board assembly
NG
Change main
board assembly
NG
Change main
board assembly