Sharp LC-46X8E/S/RU, Service Manual

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LC-46X8E/S/RU
4 – 11
<External input EXT1, EXT2> No picture on the display (4)
The CVBS video signal input from EXT1 doesn’t come out in the display.
The CVBS video signal input from EXT2 doesn’t come out in the display.
TERMINAL UNIT:
<EXT1>
Is CVBS signal sent to pin (20) of SCART1 (SC502)?
NO Check the setting of an external input device that connects of
SC502.
<EXT2>
Is CVBS signal sent to pin (20) of SCART2 (SC503)? NO Check the setting of an external input device that connects of
SC503.
YES
<EXT1>
Is CVBS signal sent to pin (65) of IC506? NO Check the line between SCART1 (SC502) and IC506.
<EXT2>
Is CVBS signal sent to pin (71) of IC506? NO Check the line between SCART2 (SC503) and IC506.
YES
Is CVBS signal (MAIN_Y/V) output from pin (52) of IC506 to pin
(2) of connector (SC501)? NO Check the line between IC506 and SC501.
MAIN UNIT: YES
Is CVBS signal (MAIN_Y/V) input to pin (2) of connector
SC1101? NO Check the connector SC501/SC1101.
YES
Is CVBS signal (MAIN_Y/V) input to pins (Y4) of IC3301
(VIDEO_PROCESSOR)? NO Check the line between SC1101 and IC3301.
YES
Refer to “The picture doesn't appear in all modes.”