LG M237WD - PC SETUP

Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
C
2009
- 17 -
3. Digital TV Video Trouble Shooting
Check RF Ca ble
Check TP Clock, Data, Sync
R440, R441, R442
Maybe Tun er(TU400) has problems
Check IC10 1 LVDS output
#8(TXEC+) , #9(TXEC-) ,
#20(TXOC+) , #21(TXOC-)
Y
N
Check Tu ner 5V Power &
Q707 5V
Replace Q7 07
Y
N
Y
Replace IC101 has problems
N
Y
Check L D400 color
Bad Tun er. Replace Tuner.
None
Yellow ->-> none
Check Demod ulator Input Clock
X400 (25MHz)
Replace X400
N
Y
Check L CD Module
Control board
Refer to Mo dule CAS
Wave form of X400