Sharp LC-32X20E Service Manual page 64

LC-32X20E/S/RU, LC-37X20E/S/RU
Does not the picture of the composite video signal input to EXT3 go out?
MINI AV UNIT:
Is CVBS signal output from pin (6) in input terminal J901 to pin
(5) of connector P901?
TERMINAL UNIT:
Is the CVBS signal input from pin (5) of connector P501 to pin (3)
of IC506 (VIDEO SELECTOR)?
Is the composite video signal detection signal V3_PLUG signal
from pin (7) of the input terminal J901 normal?
Is the V3_PLUG signal input to pin (2) of IC506?
Is video signal MAIN_Y/V output into pin (68) of connector
SC501 from pin (52) of IC506?
MAIN UNIT:
Is picture signal MAIN_Y/V input to pin (68) of connector
SC1101?
Is picture signal MAIN_Y/V input to pin (Y4) of IC3301
(VIDEO_PROCESSOR)?
Refer to "The picture doesn't appear in all modes."
<When EXT3 is used for external input> No picture on the display (7)
YES
YES
YES
YES
YES
YES
YES
NO Check the line between J901 and P901.
NO Check the line between P501 and IC506.
(Connector P901/P501, etc.)
NO Check J901 or peripheral circuits.
NO Check the between V3_PLUG_LINE J901 and pin (2) of TERMI-
NAL UNIT's IC506. (ConnectorP901/P501,etc)
NO Check the line between IC506 and SC501.
NO Check the connector (SC501/SC1101)
NO Check the line between SC1101 and IC3301.
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