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Table of Contents
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
522
IC501
Check the waveform at pin 1, 64of
IC601
522
Check the waveform at pin 63 of IC601
Check the waveform at pin 2, 72, 76 of
IC601
522
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
tu2522
OK
NO
OK
NO
tu2522
OK
NO
OK
tu2522
NO
Check the Heater voltage of
CPT(6.0~6.4 Vrms)
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,
tu2522
36, 55, 61, 68, 75 of UOC-TOP QFP80
Check the voltage at pin 25, 26 of
UOC-TOP QFP80
tu2522
Check/ Replace Q601
Check/ Replace IC601
tu2522
Check/ Replace R822, D827
Check IC901,
Check FR901, P403,
P403
P902B, FR401
- 10 -
NO
Check/ Replace IC501
Check the Heater pulse of FBT T402
Check FBT T402
LGE Internal Use Only
tu25
tu25
tu25
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