Sharp LC-52XS1E Service Manual page 55

<At the time of AVC connection>
No picture appears on LCD at the time of AVC connection.
Checklist:
1) Is "INPUT SOURCE" button
SOURCE button of the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"? • • • Set it to an appropriate level.
3) Is the level of pin (12) (13) of IC6004 (TMDS-SW) at "H"? • • • These are serial communications lines (I2C) for the control. If it is "L", check
whether something pulls it to "L".
4) IF-UNIT power supply input • • • Check whether BU5V is inputted into PD (P5801) 6/7pin, and UR15V is inputted into PE (P5802) 1/2pin.
5) LCD-CTL-UNIT power supply input • • • Check whether VCC (12V) is inputted into LC (P4802) 9/10pin.
(IF-UNIT)
IF-UNIT output part: Is the LVDS_ [TA1:TD1] ± signal outputted
to the pin (40-28) of LW connector (SC7901)? and Is the
LVDS_[TA2:TD2] ± signal outputted to the pin (26-14)?
(LCD-CTL-UNIT)
At the FPC connector (SC7001) (39-79) pin of a LCD-CTL-UNIT
output part Is [P00:P61] ± signal outputted? Check whether
3.3V are supplied to 2/3 pin, VLS15.6V is supplied to 12/13 pin,
and -6V/35V are supplied to 34/35 pin.
At the pin (2-14) of LW connector (SC4801) of LCD-CTL-UNIT
input part, Is LVDS_[RA1:RE1] ± signal inputted?
Is LVDS_[RA2:RD2] ± signal inputted into the pin (26-14)?
Is VCC (12V) inputted into the pin (9/10) of LC connector
(P4802)?
Replace LCD-CTL-UNIT.
No picture on the display (1)-2
on the remote control set up correctly? • • • Set it as the external input of the favorite with the INPUT
YES
YES
NO
YES
YES Check the soldering of connector and driver IC of the LCD-
PANEL board. Or exchange LCD.
NO Check the loose connection of LW harness, and disconnection.
or check soldering of SC4801.
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LC-52XS1E/RU/LC-65XS1E/RU