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3. Abnormal/No screen (All input)-Main PCBA
Abnormal/No screen
(all input)
1
Put into LVDS cable completely?
LVDS cable have damage?
2
is 12V/5V at 1pin of P102
Or 30pin of P101?
3
Check waveform at signal
line of P101 / P102
Change module
WAVEFORMS
3
9,10Pin of P101
(Clock line)
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Only for training and service purposes
YES
YES
YES
6,7,12,13,15,16,18,19 Pin of 1201
If LVDS cable isn't insulted enough,
NO
Insult LVDS cable until locking hook.
If LVDS cable have damage,
If is not under 1.5V at R761,
NO
change Q721 or check open and short
of Line among Q720 and Q721
5V : 20", 21", 22" / 12V : 24"
P101 : 20", 24" / P102 : 21", 22"
Check open and short
NO
Of line between Q720 and P101.
Or Check LVDS cable have damage.
Another is change IC501.
P101 Clock:9,10 / Data: 6,7,12,13,15,16,18,19
P102 Clock:10, 11, 22, 23 /
Data: 8, 9, 12, 13, 15, 16, 18, 19, 20, 21, 25, 26,
27, 28, 29, 30
(Data Line)
- 15 -
Change LVDS cable
LGE Internal Use Only
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