LG 24MN42A, Руководство по обслуживанию

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Only for training and service purposes
2. No raster (Power LED blue, black screen)
Is 19.4V at JK700?
NO RASTER
(Screen is not displayed)
Insert the F/W back
or REPLACE LCD MODULE
Is 1.1V at L701?
Is 3.3V at L712?
Is 1.25V at 2pin of IC702?
Is 2.5V at 2pin of IC703?
YES
NO
YES
NO
YES
Check Line short or open between
IV701/IC704 and IC600,
If there is any problem at Line,
Change IC701/IC704 or change IC600
NO
check open or short at Line and wafer
between IC702,IC703 and IC600.
If there is any problem at Line,
Change IC702,IC703 or IC600
1
2
is 3V at 1pin of IC800?
YES
It is not over 3V at 1pin of IC800.
Change Q801.
Or check Line short or open between
R803 and 95pin of IC600.
Change IC 600.
4
3
NO
check open or short at Line.
or change Adapter
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.
6
NO
Put into LVDS cable completely?
LVDS cable have damage?
NO
If LVDS cable isn’t insulted enough,
Insult LVDS cable until locking hook.
If LVDS cable have damage,
Change LVDS cable
5
YES
YES