Read Sharp LC-46XL2E (serv.man4) Service Manual online
LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU
4 – 14
<When EXT3 is used for external input> No picture on the display (7)
Does not the picture of the composite video signal input to EXT3 go out?
MAIN UNIT:
Is CVBS signal output from pin (6) in input terminal J901 to pin
(5) of connector P901?
Is CVBS signal output from pin (6) in input terminal J901 to pin
(5) of connector P901?
NO
Check the line between J901 and P901.
TERMINAL UNIT:
YES
Is the CVBS signal input from pin (5) of connector P501 to pin (3)
of IC506 (VIDEO SELECTOR)?
of IC506 (VIDEO SELECTOR)?
NO
Check the line between P501 and IC506.
(Connector P901/P501, etc.)
(Connector P901/P501, etc.)
YES
Is the composite video signal detection signal V3_PLUG signal
from pin (7) of the input terminal J901 normal?
from pin (7) of the input terminal J901 normal?
NO
Check J901 or peripheral circuits.
YES
Is the V3_PLUG signal input to pin (2) of IC506?
NO
Check the between V3_PLUG_LINE J901 and pin (2) of TERMI-
NAL UNIT's IC506. (ConnectorP901/P501,etc)
NAL UNIT's IC506. (ConnectorP901/P501,etc)
YES
Is video signal MAIN_Y/V output into pin (2) of connector SC501
from pin (52) of IC506?
from pin (52) of IC506?
NO
Check the line between IC506 and SC501.
MINI AV UNIT:
YES
Is picture signal MAIN_Y/V input to pin (2) of connector SC1101?
NO
Check the connector (SC501/SC1101)
YES
Is picture signal MAIN_Y/V input to pin (Y4) of IC3301
(VIDEO_PROCESSOR)?
(VIDEO_PROCESSOR)?
NO
Check the line between SC1101 and IC3301.
YES
Refer to “The picture doesn't appear in all modes.”
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