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LC-32/40/46LE600E/RU/S
<When tuner (U/V, DTV) is received>
No picture appears on LCD during the tuner (DTV) reception.
Checklist:
1) Is "INPUT SOURCE" button
control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"? ••• Set it to an appropriate level.
3) Is ANT-CABLE disconnected or connected improperly? ••• Connect it correctly as per the operation manual.
4) Attention: The terminal of IC3303 (VCT) cannot be actually checked by hiding oneself, and check it with another terminal of the same line,
please.
Is the level of pins (9) and (8) of tuner (TU1102) at "H"?
Is the digital video signal (DIFP/N) output from pin (16) (17) of
tuner (TU1102)?
Is the digital video signal (DIFP/N) input to pin (T25) (R25) of
lC3303 (VCT)?
Is the LVDS video signal (LVDS0_D [0:4] ±) output from pin
[A6:A11], [B6:B11] of lC3303 (VCT)?
Is the LVDS video signal (LVDS0_D [0:4] ±) input to pins (40)-
(28) of LW Connector (P2601), and is CLK signal (TCLK±) input
to pins (32)/(33)?
Is the I2C signal (VCOM_SDA/SCL) send to pin(12)/(13) of LP
Connector (P2602)?
Is the PNL12V output to pin (1)/(2) of PL Connector (CN7004(32
inch)/CN7503(40/46 inch)) of POWER UNIT?
Exchange LCD-CONT-UNIT and do it operate normally?
Check the contact of the LCD-CONT-UNIT connection harness
(LW/LP/PL).
Exchange LCD-PANEL if it is useless even if it exchanges it.
No picture on the display (1)-2
on the remote control set up correctly? ••• set it as "TV" with the INPUT SOURCE button
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
These are communications lines for control (I2C). Follow the
path and check whether they are forced to L(PULL_DOWN).
(IC3303 (F25) (F24) pin)
NO
Check the tuner (TU1102) and peripheral circuits.
NO
Isn't there any part with short-circuits at IC3303 (VCT)? or Check
peripheral circuits.
NO
Check IC3303 (VCT), and peripheral circuits.
NO
Check whether there is short circuit between [A6:A11], [B6:B11]
pin of IC3303 (VCT) and (40)-(28) pin of LW Connector (P2601),
and peripheral circuits.
NO
Check the I2C signal of IC2602 and peripheral circuit.
NO
Check PL connector of POWER UNIT and U7053(32inch)/
IC7502(40/46inch).
5 – 14
on the remote
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