Rgb Video Trouble Shooting - LG M237WD Service Manual

Check inpu t signal format
Is it supported?
Y
Check RGB Cable connector
for damage
Y
Check JK607
Y
Check signal , Hsync, Vsync
(R673, R674)
Y
Check signal RGB
(R119, R104, R105
C121,C122,C119)
Y
IC101 has problem
Wave form of R105/C122
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C
Only for training and service purposes

5. RGB Video Trouble Shooting

N
Replace JK607
N
Replace R6 73, R674
N
Replace R119, R104, R105,
C121,C122,C119
Wave form of R673(Vsync)
Wave form of R104/C121
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Wave form of R673(Vsync)
Wave form of R119/C119
LGE Internal Use Only