Lcd Part; Lcd Electrical Troubleshooting Guide - LG DP351G Service Manual

LCD ELECTRICAL TROUBLESHOOTING GUIDE

Display condition?
YES
Fuse normal?
YES
+7.5V, 15V, -10V
YES
+5V normal?
YES
R G B signal output?
YES
VCOM signal?
(Vip 4.5)
YES
LCD MODE
CONT signal? All "LOW" (Normal
condition?)
YES
TFT LCD
pressure voltage? +3.3V, +5V,
+15V, -10V
YES
TFT LCD normal?
YES
Color
adjusting normal?
YES
Each connector?
YES
END
LGE Internal Use Only

LCD PART

Appear shadow form
interference in black background
NO
NO
NO
D906, D901, D902
NO
IC(U902) Check and Replace
NO
Check and Replace
MPEG1389LP (Pin107, 108, 109)
NO
IC(U901) Check and Replace
NO
NO
Power source and
L9020R, L901, D901, D902 check
NO
NO
Readjust as adjustement standard
NO
Replace and Reassemble
NO
3-2
Inverter abnormal
Fuse Replace
MAIN B/D Check
Replace
Replace
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