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1. RF-STEREO MODEL
1) PICTURE OK / NO SOUND
Selected correct system in menu
Check the waveform IF of TU101
Check the waveform at pin 64,71of
IC501
Check the waveform at pin 1, 64of
IC601
Check the waveform at pin 63 of IC601
Check the waveform at pin 2, 72, 76 of
IC601
Check the waveform at pin 71, 77 of
IC601
2) No Raster / Sound OK(1/2)
Check HV, Screen voltage of CPT
Check FBT T402
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Only for training and service purposes.
TROUBLE SHOOTING
OK
NO
OK
NO
OK
NO
OK
NO
OK
NO
OK
NO
Check R, G, B out of CPT board
Check 200V line of CPT Board &
if no problem check and Replace
Check/ Replace TU101 or Input signal
Check the voltage at pin 2, 11, 18, 35,
36, 55, 61, 68, 75 of UOC-TOP QFP80
Check the voltage at pin 25, 26 of
UOC-TOP QFP80
Check/ Replace Q601
Check/ Replace IC601
Check/ Replace R822, D827
Check the Heater voltage of
CPT(6.0~6.4 Vrms)
Check IC901,
P403
- 10 -
NO
Check/ Replace IC501
Check the Heater pulse of FBT T402
Check FR901, P403,
P902B, FR401
Check FBT T402
LGE Internal Use Only
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