LG 21FS2ALX - Troubleshooting - RF-Stereo Models; RF-Stereo Model Diagnostics; No Raster or Sound Issues

TROUBLE SHOOTING
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RF- STEREO MODEL
Selected correct system
In menu
Check the waveform
IF 1 of TU101
Check the waveform
At pin 4, 5 of IC11
Check the waveform
At pin 6 of IC601
Check the waveform
At pin 2, 4 of IC601
Check the waveform
At pin 8, 9,11, 12 of IC601
Check the waveform
At pin 5, 6 of IC601
Check / Replace Q601
Check The voltage
At pin of IC821, IC822, Q807
Check / Replace
C821, IC822, Q807
Check The Voltage
At pin 2, 19, 20, 21, 24 of IIC11
Check / Replace
TU 101
Check / Replace
F806, D828(D805)
OK
OK
OK
OK
OK
OK
NO
NO NO
NO
NO
NO
No Raster / Sound OK (1/ 2)
Check the
Heater voltage of CPT
(6~ 6. 4Vrm s)
Check
HV, Screen Voltage of
CPT
Check the
Heater pulse of FBT
T402
Check
R, G, B out of
CPT Board
Check
FBT T402
Check 185V line of CPT
Board & if no problem
check and Replace
Check
IC901, P903A
Check
RF901, P402
P402B, FR401
Check
FBT T402
PICTURE O.K / NO SOUND
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