2008-03-14
LC-19LE430E/UK, LC-22LE430E/UK, LC-26LE430E/UK, LC-32LE430E/UK
55
No picture on the display (1)
The picture doesn't appear in all modes.
MAIN UNIT:
YES
YES
PANEL_UNIT:
YES
YES
No picture on the display (2)
Does not the picture come out when Analog TV is received?
TERMINAL UNIT:
YES
MAIN_UNIT: YES
YES
Is LCD controller's control signal normal?
Is the above-mentioned LVDS signals output to connector CN408?
Check the line between IC U401 and CN408.
NO
Check the panel module.
Similarly, is the LVDS signal input to connector of the panel
NO
Wire harness is checked. (main board to Panel module )
Is LVDS signal output from 1st_channel and 2nd_channel of IC
U401 in each mode?
(A0N/A0P),(A1N/A1P),(A2N/A2P),(A3N/A3P),(CK1N/CK1P)
Check IC U401 and its peripheral control circuits.
Is IF signal output from pin (13), (14) of TUNER (TU101)/ pin (10),
(11) of TU102 to in (184), (185) of IC U401?
Are the voltages of regulation for a TUNER circuit and the power
supply terminal of IC U401 supplied?
NO
Each power supply circuit is checked.
NO
Check the tuner, IC U401 and their peripheral circuits. Replace
as required.
NO
Do X4150 (27.00MHz) oscillate? Check X4150 and its peripheral circuits.
Refer to “The picture doesn't appear in all modes.”
NO
Control signals BRIGHT_ADJ, INVERTER_ON_OFF,
PANEL_VCC_ON/OFF, and it peels off and whether normality is
checked.
NO
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