Read Sharp LC-60LE925E (serv.man18) Service Manual online
LC-46/60LE925E (1st Edition)
7 – 9
No picture on the display (2)
Does not the picture come out when VHF/UHF is received?
Is the video signal (TUNER_CVBS) output from pin (16) of
TUNER (TU1101)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Is the video signal (TUNER_CVBS) sent to pin (AD29/
TU_CVBS) of IC3302 (Digital AV decode & Main CPU)?
TU_CVBS) of IC3302 (Digital AV decode & Main CPU)?
NO
Check the line between TU1101 and IC3302. (Q1106, etc.)
YES
Refer to “The picture doesn't appear in all modes.”
No picture on the display (3)
Does not the picture come out when DTV is received?
Refer to “No sound (during the reception of TV (DIGITAL) broadcasting)”
No picture on the display (4)
Does not the picture come out when DTV (Satellite) is received?
Refer to “No sound (during the reception of TV (DIGITAL-Satellite) broadcasting)”
[External input EXT1] No picture on the display (5)
Does not the picture of the CVBS signal input to EXT1 go out?
Is CVBS signal sent to pin (14) of EXT1 (SC505)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
YES
Is CVBS signal from EXT1 (SC505) sent to pin (AG29/
SC1_CVBS_Y) of IC3302 (Digital AV decode & Main CPU)?
SC1_CVBS_Y) of IC3302 (Digital AV decode & Main CPU)?
NO
Check the line between SC505 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
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