Sharp LC-26SH7E/RU Service Manual page 63

The picture doesn't appear in all modes.
MAIN UNIT:
Is LVDS signal output from 1st_channel and 2nd_channel of IC U400 in each mode?
(A0N/A0P),(A1N/A1P),(A2N/A2P),(A3N/A3P),(CK1N/CK1P)
Is the above-mentioned LVDS signals output to connector CN751?
Is LCD controller's control signal normal?
PANEL_UNIT:
Similarly, is the LVDS signal input to connector of the panel
module?
Check the panel module.
Does not the picture come out when VHF/UHF is received?
TERMINAL UNIT:
Is TUNER_CVBS signal output from pin (24) of TUNER (TU201)?
MAIN_UNIT:
Is picture signal input from pin (24) of TUNER (TU201) to pin
(AB24) of IC U400?
Refer to "The picture doesn't appear in all modes."
No picture on the display (1)
↓
↓
YES
↓YES
↓YES
↓YES
No picture on the display (2)
↓
↓
↓YES
↓YES
2008-03-14
LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU
Check IC U400 and its peripheral control circuits.
NO
Check the line between IC U400 and CN751.
NO Control signals BRIGHT_ADJ, INVERTER_ON_OFF,
PANEL_VCC_ON/OFF, and it peels off and whether normality is
checked.
NO
Wire harness is checked.
NO
Check whether I2C is normally accessed between TU201 and IC
U400.
NO Check the line between IC U400 and TU201.
63
↓NO