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Check screen condition by changing display modes.
Operate the "ALL RESET" to check if screen condition changes.
(Press and hold MENU and SELECT buttons while turning on power switch.)
A
Screen stays in black.
Screen stays in white.
Check the following signals
1) Check if module control signal is output (U1).
2) Check if VLCD voltage is output normally.
Yes
Main PWB defective.
Screen does not operate normally.
Check RGB cable.
Screen jitters or on-screen
characters flicker.
CLOCK and PHASE
can be adjusted?
No
LL-T15S3 TROUBLESHOOTING
4 – 2
Defective
Replace RGB cable with
a new one.
Does abnormal area move on
screen when BLACK LEVEL or
CONT is changed after H-POS
or V-POS is set?
Yes
No
Switch PWB defective
Abnormal color
Yes
No
LCD panel defective.
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