Check RF Cable
Check TP Clock, Data, Sync
R521, R532, R533
Maybe Tuner(IC500) has problems
Check P1103
#13, #14, #25, #26
Y
N
Check Tuner 5V Power &
Q1105 5V
Replace Q1105
Y
N
Y
Replace IC100 has problems
N
Y
Check LD500 color
Bad Tuner. Replace Tuner.
None
Yellow ∆ none
Check Demodulator Input Clock
X500 (31.875MHz), X501(20.48MHz)
Replace X500
Replace X501
N
Y
Check LCD Module
Control board
Refer to Module CAS
Wave form of X500
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3. Digital TV Video Trouble Shooting
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