Read Sharp LC-90LE757E Service Manual online
LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU
6 – 9
[External input PC] No picture on the display (10)
Does not the picture of the ANALOG-RGB signal input to PC_IN (15pin-D-SUB terminal) go out?
Do ANALOG-RGB and synchronized signal input to pin
[(1, 2, 3)/(PC_RED, GREEN, BLUE), (14 and 13)/(PC_VSYNC,
H.Sync) ] of PC_IN (SC501) ?
[(1, 2, 3)/(PC_RED, GREEN, BLUE), (14 and 13)/(PC_VSYNC,
H.Sync) ] of PC_IN (SC501) ?
NO
Check the connection and setup with the external PC_IN devices.
YES
Do ANALOG-RGB and synchronized signal input to pins [AR25/
PC_RP, AR24/PC_GP, AU24/PC_BP, and AN25/PC_HSYNC,
AM25/PC_VSYNC] of IC3301 (Digital AV decode & Main CPU) ?
PC_RP, AR24/PC_GP, AU24/PC_BP, and AN25/PC_HSYNC,
AM25/PC_VSYNC] of IC3301 (Digital AV decode & Main CPU) ?
NO
Check the line between SC501 and IC3301.
YES
Refer to “No picture on the display (1)”
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