Sharp Aquos LC-32GD1E, Service Manual

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26
LC-32GD1E
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.) (VGH,VGL,VLS,VSH) Remove the FPC that is connected to SC4651 and SC4652. (T
o prevent the panel from breaking)
When the P
A
TTERN 1 setting in the
adjudtment process menu is changed from 00 to 02, 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(32") F7503(37") on the INVER
TER PWB blown?
Check the circuits after replacing the fuse.
Is power supplied to each
INVER
TER
PWB?
Is the control signal (OFL1/2, INV
-
OSC) being output at pins 3, 4, and 5 of BL(P7705) on the LCD CONT PWB?
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