LG TH-20LA60PS Service Manual page 14

No Raster on video Signal
(Video, S-Video)
Repeat A PROCESS
Pass
Check the input
source
Pass
Ref.2
Check the input/output
of IC200 of main B/D
Pass
Ref.3
Check the input/output
of IC500 of main B/D
Pass
Check cable
and jack
CVBS INPUT :
Ref.2
IC200(VCTi) #60
No Raster on TV(RF)
Signal
Pass
Check the output of
TU100(tuner)
Pass
Check short of main B/D
& JACK B/D
Fail
Check short of main B/D
or Change the defect part
Fail
Check short of main B/D
or Change IC500
Fail
ITU656 Clock Out :
Ref.3
IC200(VCTi) #83
- 14 -
Check 5V, 33V of TU100
Re-soldering or
Fail
Change the defect part