Sharp LC-26D43U - Page 30

30
LC-26D43U
TROUBLESHOOTING TABLE (Continued)
<Component video signal input> No video output (1)
No
Yes
Yes
No
No
Yes
Check between J507 and pin 21 of IC501.
Is the video signal detection function normal?
Check between J507 and pin 38 of IC501.
When INPUT-1 cannot be selected since the characters
INPUT-1 on the menu screen are gray.
Select INPUT-1 and the input signal on the input switching
menu screen.
No video output from extermal input <<INPUT-1>>
Is INPUT-1 selected on the input switching menu screen?
Is video signal fed to pin 21 of IC501 (AV SWITCH)?
Is video signal sent to pin 60 of IC501?
Check IC501 (AV SWITCH) and peripheral circuits.
No
Yes
No
Yes
Check IC2602 and peripheral circuits.
Check between IC501 and IC3301.(Q2202,Q2210,etc.)
Is video signal fed to pin K25 of IC8101 (Broadcom) via
L.P.F. composed of Q2202 and Q2210?
Are digital video (LVDS) signals sent from pins 37-42 and
45-48 of IC2602?
Check LCD_CONTROL PWB.
Yes
No
Are digital video (COMOS) signal sent from IC8101
(DVODATA 0-23,DVOCLKO,DVODE,DVOHSYNC,
DVOVSYNC)?
Check IC8101 and peripheral circuits.