TCL LCD32M61S3-MS19, Service Manual

Page: 72 / 72

Y N
Y N Y N
Replace
U8
Check
Tuner and
R220 and
L29,C181
if Pin3,Pin13,Pin17and
Pin22 no voltage or low
voltage,check relevant
circuitry
Check voltage
of Pin6 of U19
and Q22 and
relevant
Fig4.Picture OK, but No Sound
Check the
speakers
Check the power supply
voltage and mute control
circuitry if regular
Picture Good,but No Sound
increase the volume and press the
mute key on remote control
test waveform of Pin4 and Pin12 of
U19 if OK
Test waveform of
Pin1,Pin2,Pin15 and
Pin16 if OK
test waveform of
Pin54/Pin55 of U8 if
regular