Sharp LC-19SK25U Service Manual page 48

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U
TROUBLESHOOTING TABLE (Continued)
No video output from extermal input <<INPUT-1>>
Yes
Is video signal fed to pins 7, 8 and 9 of P501?
Yes
Is video signal fed to pins K2, M2 and P3, T2 of IC801?
Yes
Are signals from A6, A1, E1, E2, W5, W6, W7, Y6, AA6 of
IC801 normal?
Yes
Check IC9201 and peripheral circuits.
<Component video signal input> No video output (INPUT-1)
Select INPUT-1 and the input signal on the input switching
menu screen.
No Check between J501 and pins 7,8 and 9 of P501.
(Q501, Q502, Q503)
No
Check between IC801 and IC501.
No
Check IC801 and peripheral circuits.
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