LG 22LS2100, Руководство по обслуживанию

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Only for training and service purposes
3. Abnormal/No screen (All input)-Main PCBA
Put into LVDS cable completely?
LVDS cable have damage?
Abnormal/No screen
(all input)
Check waveform at signal
line of P201 (Clock:10,11,22,23
Data: 8,9,12,13,15,16,18,19,20,
21,25,26,27,28,29,30)
YES
NO
YES
NO
YES
If LVDS cable isn’t insulted enough,
Insult LVDS cable until locking hook.
If LVDS cable have damage,
Change LVDS cable
1
Change module
WAVEFORMS
3
Is 5V at 1pin of P201?
If is not under 1.5V at R744,
change Q702 or check open and short
of Line among Q703 and Q702.
If is under 4.8V at L710,
Check open and short
Of line between L710 and P201.
2
3
NO
Check open and short
Of line between Q703 and P201.
Or Check LVDS cable have damage.
Another is change IC600.
8,9,12,13,15,16,18,19,20,21,
25,26,27,28,29,30Pin of P201
(Data Line)
10,11,22,23Pin of P201
(Clock line)