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5. Digital TV Video
Check RF Cable
Y
Check Tuner 5V Power
IC703 #5 Pin
Y
Check LD400 color
None
Check TP Clock, Data, Sync
R440, R441, R442
Y
Check Demodulator Input Clock
X400 (25MHz)
Y
Check Mstar LVDS output
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+)
Y
Check LCD Module
Control board
Refer to Module CAS
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
N
Yellow ‡ none
Bad Tuner. Replace Tuner.
N
Maybe Tuner(TU400) has problems
N
Replace it
N
Replace
Mstar(IC100) has problems
- 19 -
Replace IC703
X400
LGE Internal Use Only
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