Abnormal/No Screen (All Input) - Main Pcba - LG 22LS2100 Service Manual

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 5V at 1pin of P201?
Check waveform at signal
3
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)
Change module
WAVEFORMS
3
10,11,22,23Pin of P201
(Clock line)
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Only for training and service purposes
YES
YES
YES
8,9,12,13,15,16,18,19,20,21,
25,26,27,28,29,30Pin of P201
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 R744,
change Q702 or check open and short
NO
of Line among Q703 and Q702.
Of line between L710 and P201.
NO
Of line between Q703 and P201.
Or Check LVDS cable have damage.
(Data Line)
- 14 -
Change LVDS cable
If is under 4.8V at L710,
Check open and short
Check open and short
Another is change IC600.
LGE Internal Use Only