Read LG 47LG5010 / 47LG5020 / 47LG5030 (CHASSIS:LD84D) Service Manual online
C
2008
- 22 -
TROUBLESHOOTING
Check TU500 Pin15(Vi deo outp ut),
Pin16(So un d output)
Can you see the norm al signal?
Check the output of TR(Q503).
Can you see the norm al wave form?
Check the output of Main IC(IC100).
Especial ly you sho uld check
The H,V s ync and cloc k.
Can you see the norm al wave form?
YES
YES
NO
Could you measure vol tage of
TU800 & IIC lines?
Are the y all norma l?
YES
NO
You sho uld check po wer line
& IIC lines.
YES
You sho uld rep lace TUNER.
NO
You sho uld decide to replace TR(Q503)
or not.
NO
After checking the Power of Main
IC(IC100) you sho uld decide to replace
Main IC or not.
This board has big problem
because
Main IC(IC100) have some trouble s.
After checking thorou ghly all path once
again, You sho uld deci de to repla ce
Main Board or not.
TV/CATV doesn’t display
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