Read Sharp LC-32D44E (serv.man5) Service Manual online
LC-32D44E/S/RU-BK/GY
4 – 13
<When EXT3 is used for external input> No picture on the display (8)
Does not the picture of the Y/C video signal input to EXT3 go out?
Is Y/C signal input into pin(14), (12) of connector
SC1001 from pin(3)/Y, (4)/C of J1001?
SC1001 from pin(3)/Y, (4)/C of J1001?
NO
Check the line between J1001 and SC1001.
YES
Is Y/C signal output from pin(14)/Y,(12)/C of connector
P1001 ?
P1001 ?
NO
Check the connector SC1001/P1001.
YES
Is the Y/C video signal detection function SV1JSW sig-
nal from pin (6) of the input terminal J1001 normal?
nal from pin (6) of the input terminal J1001 normal?
NO
Check J1001 or peripheral circuits.
YES
Is the SV1JSW signal input to pin(2) of IC1001
(VIDEO_SELECTOR) and pin(27) of IC2302
(SUB_MICON)?
(VIDEO_SELECTOR) and pin(27) of IC2302
(SUB_MICON)?
NO
Check the between SV1JSW_LINE J1001 and IC1001/IC2302. (Con-
nector SC1001/P1001, etc.)
nector SC1001/P1001, etc.)
YES
Is Y/C signal sent to pins (184), (183) of
IC3001(MAIN_MICON)?
IC3001(MAIN_MICON)?
NO
Check the line between P1001 and IC3001.
(IC1001, EXT_DTV_LINE etc.)
(IC1001, EXT_DTV_LINE etc.)
YES
Refer to “The picture doesn't appear in all modes.”
<When EXT4 is used for external input> No picture on the display (9)
Does not the picture of the DVI(ANALOG) video signal input to EXT4(15pin-D-SUB terminal) go out?
YES
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 (SC1201)?
from pin(1, 2, 3)/(R, G, B), (13 and 14)/(V, H) of input
terminal D-SUB (SC1201)?
NO
Check the connection and setup with the external DVI devices.
YES
Is EDID data pin (6)/SCL, pin(5)/SDA of IC1201
(EEPROM) accessed, and is it read from pin (15),(12)
of a DVI terminal(SC1201)?
(EEPROM) accessed, and is it read from pin (15),(12)
of a DVI terminal(SC1201)?
NO
Is access possible in the re-writing or exchange of EDID data of
IC1201?
IC1201?
YES
NO
Check the circumference circuit of SC1201, IC1201.
Are the video signal and the synchronized signal input
from pin(174, 173, 172)/(R, G, B), pin(171, 47)/(H, V) of
IC3001(MAIN_MICON)?
from pin(174, 173, 172)/(R, G, B), pin(171, 47)/(H, V) of
IC3001(MAIN_MICON)?
NO
Check the line between SC1201 and IC3001.
(IC1941,etc)
(IC1941,etc)
YES
Refer to “The picture doesn't appear in all modes.”
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