Read Sharp LC-42XD1EA (serv.man4) Service Manual online
LC-42XD1EA/RUA
4 – 20
LCD failure 1
Does a single or several verti-
cal stripes appear on the LCD
screen?
cal stripes appear on the LCD
screen?
Does a single or several hori-
zontal stripes appear on the
LCD screen?
zontal stripes appear on the
LCD screen?
Do luminescent or black dots
appear on the screen?
appear on the screen?
Is the on-screen image rip-
pling or distorted?
pling or distorted?
Replace the LCD panel.
LCD failure 2
The backlight func-
tions. Does not the
image come out in the
LCD screen
(screen black)?
tions. Does not the
image come out in the
LCD screen
(screen black)?
Does the entire LCD
screen look whitish all
over?
screen look whitish all
over?
Does the QS drive func-
tion?
tion?
Are the data bit drop-
out?
(No solution even when
turning on and off the QS
drive)
out?
(No solution even when
turning on and off the QS
drive)
Is the gamma correc-
tion as specified?
tion as specified?
Replace the LCD control unit.
