Trouble Shooting - LG RT-29FB55RB Service Manual

Selected correct system
In menu
OK
Check the waveform
IF 1 of TU101
OK
Check the waveform
At pin 4, 5 of IC11
OK
Check the waveform
At pin 2, 4 of IC601
OK
Check the Voltage
At pin 6 of IC601
OK
Check the waveform
At pin 8, 9, 11, 12 of IC601
OK
Check the Voltage
At pin 5, 6 of IC602
Check
HV, Screen Voltage of
CPT
NO
Check 200V line of
Check
CPT Board
FBT T402
& if no problem
check and Replace

TROUBLE SHOOTING

RF- STEREO
NO
Check / Replace
TU 101
NO
Check The Voltage
At pin 2, 19, 20, 21, 24 of IIC11
NO
Check / Replace Q601
NO
Check / Replace
F806, D828(D805)
No Raster / Sound OK
Check the
Heater voltage of CPT
(6 ~ 6.5Vrms)
OK
Check
R, G, B out of
CPT Board
OK
NO
Check
IC901, P903A
- 12 -
NO
Check The voltage
At pin of IC821, IC822, Q807
NO
Check / Replace
C821, IC822, Q807
NO
Check the
Heater pulse of FBT
T402
OK
Check
FR901, P402A
P402B, FR 401
NO
Check
FBT T402