Read Sharp LL-T155A (serv.man2) Service Manual online
1
Screen is not normal
Check the screen condition by changing the display modes.
Reset the microprocessor to check to see if the screen condition changes.
Screen stays in black.
Screen stays in white
Jittering screen and
flickering characters
flickering characters
Abnormal color
Is RGB setting in OSD
adjustment appropriate?
adjustment appropriate?
Check the following signals
(LCD signal input terminals):
(LCD signal input terminals):
+5V power check for LCD
Clock signal
DE signal
H sync/ V sync signal
Clock signal
DE signal
H sync/ V sync signal
Check LCD signal input terminal
corresponding to the color
condition on screen.
corresponding to the color
condition on screen.
Normal
Abnormal
Backlight system normal
LED lights in green
Brighten screen condition.
LED lights in green
Brighten screen condition.
Under the above conditions,
check LCD signal input terminal.
check LCD signal input terminal.
Defective interface unit
Defective LCD module
Are OSD adjustment PHASE,
CLOCK settings appropriate?
(If not, adjust according to
Instruction manual.)
CLOCK settings appropriate?
(If not, adjust according to
Instruction manual.)
Normal
Normal
Abnormal
Abnormal
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