LC-32D44E (serv.man5). Trouble Shooting Table - Sharp TV Service Manual (repair manual). Page 12

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LC-32D44E/S/RU-BK/GY
4 – 12
[External input EXT1,EXT2] No picture on the display (6)
Does not the picture of the Y/C video signal input to EXT1 go out?
Does not the picture of the Y/C video signal input to EXT2 go out?
<EXT1>
Is Y/C video signal sent to pins (20)/Y and (15)/C of 
SCART1 (SC1102)?
NO
Check the setting of an external input device that connects of SC1102.
<EXT2>
Is Y/C video signal sent to pins (20)/Y and (15)/C of 
SCART2 (SC1101)?
NO
Check the setting of an external input device that connects of SC1101.
YES
<EXT1>
Is Y/C signal sent to pins (190)/Y, (187)/C of 
IC3001(MAIN_MICON)?
NO
Check the line between SC1102 and IC3001.
.(IC502, SCART12_LINE, etc.)
<EXT2>
Is Y/C signal sent to pins (190)/Y, (178)/C of 
IC3001(MAIN_MICON)?
NO
Check the line between SC1101 and IC3001
.(IC502, SCART12_LINE, etc.)
YES
Refer to “The picture doesn’t appear in all modes.”
<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?
Is CVBS signal output from pin(6) in input terminal 
J1002 to pin(10) of connector SC1001?
NO
Check the line between J1002 and SC1001.
YES
Is the CVBS signal input from pin(10) of connector 
P1001 to pin(1) of IC1001(VIDEO SELECTOR)?
NO
Check the line between P1001 and IC1001. 
(Connector SC1001/P1001, etc.)
YES
Is CVBS signal output to pin(184) of 
IC3001(MAIN_MICON) from pin(7) of IC1001?
NO
Check the line between IC1001 and IC3001. 
(SV1JSW_LINE, EXT_DTV_LINE, etc.)
YES
Refer to (The picture doesn't appear in all modes.)

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