Read Sharp LC-46X20E (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 – 18
<When EXT7 is used for external input> No picture on the display (11)
Does not the picture of the DVI(ANALOG) video signal input to EXT7(15pin-D-SUB terminal) go out?
MAIN_UNIT:
Are the video signal and the synchronized signal input from pin
(1, 2, 3)/(R, G, B), (13 and 14)/(V, H) of input terminal D-SUB
(SC1504)?
Are the video signal and the synchronized signal input from pin
(1, 2, 3)/(R, G, B), (13 and 14)/(V, H) of input terminal D-SUB
(SC1504)?
YES
Check the connection and setup between SC1504 and its cir-
cumference circuit as well as the external HDMI devices.
(IC1503, etc.)
cumference circuit as well as the external HDMI devices.
(IC1503, etc.)
NO
Are the video signal and the synchronized signal input from pin
(U8, Y7, W10)/ (R, G, B), pin (V10, U10)/(H, V) of IC3301 (VIDEO
PROCESSOR)?
(U8, Y7, W10)/ (R, G, B), pin (V10, U10)/(H, V) of IC3301 (VIDEO
PROCESSOR)?
YES
Check the line between SC1504 and IC3301.
NO
Refer to “The picture doesn't appear in all modes.”
<When EXT8 is used for external input> No picture on the display (12)
Does not the picture of the component video signal input to EXT8 go out?
TERMINAL UNIT:
Is COMPONENT video signal input into pin (6)/Y, (5)/Pb, (4)/Pr of
the input terminal J508?
Is COMPONENT video signal input into pin (6)/Y, (5)/Pb, (4)/Pr of
the input terminal J508?
NO
Check the connection of J508 and the external input device.
YES
Is COMPONENT video signal input into pin (33)/Y, (35)/Pb, (37)/
Pr of IC506 (VIDEO SELECTOR)?
Pr of IC506 (VIDEO SELECTOR)?
NO
Check the line between J508 and IC506.
YES
Is detection signal COMP1_PLUG of the COMPONENT video
signal from pin (7) of the input terminal J508 normal?
signal from pin (7) of the input terminal J508 normal?
NO
Check from the input terminal J508 to pin (38) of IC506.
YES
Is COMPONENT signal output into pin (6), (8), (10) of the con-
nector SC501 from pin (60)/Y, (59)/PB, (58)/PR of IC506?
nector SC501 from pin (60)/Y, (59)/PB, (58)/PR of IC506?
NO
Check the line between IC506 and SC501.
(Q516, Q518, Q520, etc.)
(Q516, Q518, Q520, etc.)
MAIN UNIT:
YES
Is COMPONENT signal output from pin (6), (8), (10) of the con-
nector (SC1101)?
nector (SC1101)?
NO
Check the connector (SC501/SC1101)
YES
Is COMPONENT signal input into pin (W6), (Y9), (W8) 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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