LG DP450P Service Manual

3-2
LCD PART
LCD ELECTRICAL TROUBLESHOOTING GUIDE
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Appear shadow form
interference in black background
Display condition?
Fuse normal?
+7.5V, 15V, -10V
+5V normal?
R G B signal output?
VCOM signal?
(Vip 4.5)
LCD MODE
CONT signal? All “LOW” (Normal
condition)
TFT LCD
pressure voltage? +3.3V, +5V,
+15V, -10V
TFT LCD normal?
Color
adjusting normal?
Each connector?
END Replace
Replace and Reassemble
Readjust as adjustement standard
Replace
Power source and
L909, L1, D1, D2 check
MAIN B/D Check
IC(U1) Check and Replace
Check and Replace
MPEG1389LP (Pin107, 108, 109)
IC(U2) Check and Replace
D6, D1, D2
Fuse Replace
Inverter abnormal

LG DP450P Specifications

General

Brand	LG
Model	DP450P
Category	Portable DVD Player
Language	English