Sharp LC-32LE600E Service Manual page 47

<When EXT3/4/8 is used for external input>
No Composite video output when the EXT8 external input is
used.
Checklist:
1) Is "INPUT SOURCE" button
the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"? ••• Set it to an appropriate level.
3) Check the connection to the external device ••• Connect it correctly as per the operation manual for the device.
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 Composite video signal sent to pin (6) of EXT8 terminal
(J505)? (CVBS_IN)
Is the Composite video signal (CVBS_IN) sent to input terminal
pin (AC24) of IC3303 (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 (4)-3
on the remote control set up correctly? ••• set it as "EXT3"/"EXT4"/"EXT8" with the INPUT SOURCE button on
YES
YES
YES
YES
YES
NO
LC-32/40/46LE600E/RU/S (1st Edition)
NO Check external connection, input setting, EXT8 terminal (J505)
and peripheral circuits.
NO Check between pin (6) of EXT8 terminal (J505) and pin (AC24)
of 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).
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