LG LSS-3200A Service Manual page 45

(E)
Check current out to TV channel
number.
OK
Check RF modulator Part.
OK
Check chroma delay part.
OK
(D)
FIG. 15
RF modulator input composite signal
NO
Change out to TV channel in Setup
Menu.
NG
Check modulator power: TU301(3)
Check modulator input signal:
TU301(8) FIG. 15
Check modulator contorl signal:
Modulator On check: TU301(7) high
Channel select pin check: CH3:
TU301(5) high
CH4: TU301(5) low
NG
Check chroma delay transistor circuits.
Q600, Q605 , L601...
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