Read Sharp LC-32GD1E (serv.man8) Service Manual online
26
LC-32GD1E
LC-37GD1E
LC-37GD1E
The display is entirely whitish or
dark. (LCD power)
When the
A
VC system is connected
and the picture is checked, is the
display all white or all black?
Check the
A
VC system.
Check the supply voltage supplied
to the panel.
(Check it at SC4651 and SC4652.)
Remove the FPC that is connected
to SC4651 and SC4652.
(T
o prevent the panel from breaking)
When P
A
TTERN1 is selected from
the adjustment process menu and
P
A
TTERN3 is set to 1, is the
gradation pattern displayed
correctly?
(Is it too light or too dark?)
Ye
s
Ye
s
No
No
The backlight does not light.
Has the fuse for F7401 or F7501
blown?
Check the circuits after replacing
the fuse.
Is power supplied to each inverter
PWB?
Is the control signal (OFL1/2, INV
-
OSC) being output at pins 3, 4, and
5 of P7705 on the LCD CONT
Check the fluorescent lamp
connector and the inverter circuit.
See if the cable is connected
between PWBs.
Check the IC4501 (LCD-CONT)
peripheral circuits.
Ye
s
Ye
s
Ye
s
Ye
s
No
No
No
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