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3. Digital TV Video Trouble Shooting

Check RF Cable
Y
Check TP Clock, Data, Sync
R630, R631, R632
NMaybe Demodulator has problem s
Y
Maybe MstarS7(IC 100)
has problems
Check Tuner(TU1300) Powe r
(5.0V, 3.3V, 1.2V)
NReplace one of Bead
& Recheck
Y
Check IF Signal pin #17, 18 NMaybe Tuner has problems
Y
Check Demodulator Power
(3.3V, 1.2V) L609, IC600
NReplace L609 / IC600
Y
Check Demodulator X-TAL
(X602)
NReplace X-TAL
Y