TCL LCD32M61S3-MS19, Service Manual

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No Picture
N Y
Y Y N
Replace
U8
Y Y N
check
waveform
of L28 if
regular
Check the
work
conditions
of Tuner
if OK
Y Y
Fig3. No Picutre
replace U8
Test waveform of Pin49
of U8 if regular
check waveform of L28
if regular
replace Tuner
AV input if have picture
check P4 if assemble
regular
check Q2,Q3,Q4 and
relevant if regular
Check Pin 155 and
Pin156 of U8 if output
regular and test the
working conditions of
U8