Read Sharp LL-T18A1 Service Manual online
LL-T18A1
TROUBLE SHOOTING
5 – 2
A
2
Display abnormality
Check the analog and the digital cables.
Change the display mode to check the display.
Normal
Abnormal
Replace the analog
and the digital cables.
and the digital cables.
Execute Microcomputer reset and check that the display changes.
(Press and hold the MENU and the SELECT button, turn on the POWER SW.)
(Press and hold the MENU and the SELECT button, turn on the POWER SW.)
Remains black.
Remains white.
Deflection of display, text flicker.
Color abnormality
Analog
Digital
YES
YES
YES
NO
NO
NO
Check the following signals
Check that the module control signal is outputted.
LCD control signals of X1, U4, U9, U10
Check the microcomputer control circuit peripheral.
Check the microcomputer control circuit peripheral.
Main PWB trouble.
CLOCK and PHASE
can be adjusted.
can be adjusted.
Switch PWB trouble.
When H-POS and V-POS are set,
if the BLACK LEVEL or CONT is
varied, the abnormal section shifts
on the display.
if the BLACK LEVEL or CONT is
varied, the abnormal section shifts
on the display.
LCD panel trouble
Cable trouble
Cable trouble
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