Read Sharp LC-32LE600E (serv.man7) Service Manual online
LC-32/40/46LE600E/RU/S
5 – 13
<When tuner (U/V, DTV) is received> No picture on the display (1)-1
No picture appears on LCD during the tuner (U/V) reception.
Checklist:
1) Is “INPUT SOURCE” button
on the remote control set up correctly?
••• set it as “TV” with the INPUT SOURCE button
on the remote
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.
YES
Is the level of pins (9) and (8) of tuner (TU1102) at “H”?
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)
path and check whether they are forced to L (PULL_DOWN).
(IC3303 (F25) (F24) pin)
YES
Is the video signal (VIDEO) output from pin (6) of tuner
(TU1102)?
(TU1102)?
NO
Check the tuner (TU1102) and peripheral circuits.
YES
Is the video signal (TUNER_CVBS) input to pin (AD25) of lC3303
(VCT)?
(VCT)?
NO
Isn't there any part with short-circuits at IC3303 (VCT)? or Check
peripheral circuits.
peripheral circuits.
YES
Is the LVDS video signal (LVDS0_D [0:4]
±) output from pin
[A6:A11], [B6:B11] of lC3303 (VCT)?
NO
Check IC3303 (VCT), and peripheral circuits.
YES
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)?
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.
pin of IC3303 (VCT) and (40)-(28) pin of LW Connector (P2601),
and peripheral circuits.
YES
Is the I2C signal (VCOM_SDA/SCL) send to pin(12)/(13) of LP
Connector (P2602)?
Connector (P2602)?
NO
Check the I2C signal of IC2602 and peripheral circuit.
YES
Is the PNL12V output to pin (1)/(2) of PL Connector (CN7004(32
inch)/CN7503(40/46 inch)) of POWER UNIT?
inch)/CN7503(40/46 inch)) of POWER UNIT?
NO
Check PL connector of POWER UNIT and U7053(32inch)/
IC7502(40/46inch).
IC7502(40/46inch).
YES
Exchange LCD-CONT-UNIT and do it operate normally?
NO
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.
(LW/LP/PL).
Exchange LCD-PANEL if it is useless even if it exchanges it.
Click on the first or last page to see other LC-32LE600E (serv.man7) service manuals if exist.