Read Sharp LC-40LU700E (serv.man9) Service Manual online
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 13
[External input EXT3] No picture on the display (7)
Does not the picture of the component video signal input to EXT3 go out?
Is a COMPONENT video signal input to pins (3)/Y, (5)/Pb, (7)/Pr
of EXT3 (J503)?
of EXT3 (J503)?
NO
Check the setting of an external input device that connects with
EXT3.
EXT3.
YES
Is COMP_PLUG detection signal to (AF7/COMP_PLUG) of
IC3302 (Digital AV decode & Main CPU) input from pin(2) of
EXT3 (J503)?
IC3302 (Digital AV decode & Main CPU) input from pin(2) of
EXT3 (J503)?
NO
Check the line between IC3302 and J503.
YES
Is COMPONENT signal sent to pins (AJ18/COMP__Y), (AJ19/
COMP__Pb) and (AH19/COMP__Pr) of IC3302
COMP__Pb) and (AH19/COMP__Pr) of IC3302
NO
Check the line between IC3302 and J503.
YES
Refer to “The picture doesn't appear in all modes.”
[External input EXT4] No picture on the display (8)
Does not the picture of the DVI (ANALOG) video signal input to EXT4 (15pin-D-SUB terminal) go out?
Are the video signal and the synchronized signal input from
pin(1, 2, 3)/(R, G, B), (14 and 13)/(V, H.Sync) of EXT4 (SC501)?
pin(1, 2, 3)/(R, G, B), (14 and 13)/(V, H.Sync) of EXT4 (SC501)?
NO
Check the connection and setup with the external DVI devices.
YES
Are the video signal and the synchronized signal input from pins
(AK17/PC__R) (AK16/PC__G)(AH15/PC__B) and (AK14/
PC_HSYNC) (AJ14/PC_VSYNC) of IC3302
(Digital AV decode & Main CPU)?
(AK17/PC__R) (AK16/PC__G)(AH15/PC__B) and (AK14/
PC_HSYNC) (AJ14/PC_VSYNC) of IC3302
(Digital AV decode & Main CPU)?
NO
Check the line between SC501 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
[External input EXT8] No picture on the display (9)
Does not the picture of the CVBS signal input to EXT8 go out?
Is a CVBS signal input to pin (6) of EXT8 (J505)?
NO
Check the setting of an external input device that connects with
EXT8.
EXT8.
YES
Is V3_PLUG detection signal input to pin (AJ1/CVBS_PLUG) of
IC3302 (Digital AV decode & Main CPU) from pin(7) of EXT8
(J505)?
IC3302 (Digital AV decode & Main CPU) from pin(7) of EXT8
(J505)?
NO
Check the line between J505 and IC3302.
YES
Is CVBS signal sent to pin (AE29/CVBS__IN) of IC3302?
NO
Check the line between J505 and IC3302.
YES
Refer to “The picture doesn't appear in all modes.”
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