Trouble Shooting - LG RE-28CB80RX Service Manual

Selected correct system
In menu
Check the waveform
At pin 17 of TU101
Check the waveform
At pin 24,25 of IC661
Check the waveform
At pin 4,12 of IC602
Check the Voltage
At pin 6, 7 of IC602
Check the waveform
At pin 1, 2, 14, 15 of IC602
Check the Voltage
At pin 3,13 of IC602
Check
HV, Screen Voltage of
CPT
NO
Check / Replace
CPT Board
Components
Check
FBT T402

TROUBLE SHOOTING

RF- STEREO
OK
NO
OK
NO
OK
NO
OK
NO
OK
OK
NO
No Raster / Sound OK
Check the
Heater voltage of CPT
(6 ~ 6.5Vrms)
OK
Check
IK Current of
IC01, pin37,39,40
OK
Check
IC01, Q901, IC901
P03A, P03B, P541
Check / Replace
TU 101
Check The Voltage
At pin 16,33,46, of IC661
Check / Replace
Q671, 672
Check / Replace
Q621, IC603
Check / Replace
F851, D862
NO
Check
FR901, P402A
P402B, P302
- 18 -
NO
Check The voltage
At pin of IC610, IC853
NO
Check / Replace
IC610, IC853
NO
Check the
Heater pulse of FBT
T402
OK NO
Check
FBT T402