Sharp LC-37D44U Service Manual page 41

S-VIDEO: No external input video [INPUT-2]
Is INPUT-2 selected on the input select menu screen?
Is the video signal detection function normal?
Check the line between pin(6) of J504 and pin AE2 of
IC8001
YES
Are Y and C signals fed to pins AL17 and AL16 of IC8001 via L.P.F com-
posed of capacitor and inductor between (Q513,Q514) and (Q523,Q524)
respectively?
Check the line between J504 and IC8001.
(Q513,Q524,etc)/(Q514,Q524,etc)
YES
Are digital video (LVDS) signals sent from pins B5~7, C5~7, D5~7, and
E5~7 of IC8001?
Are digital video (RSDS) signals sent from IC5103 to SC5201 and
SC5202?
Check between (SC5201, SC5202) and LCD Panel.
No video (3)
NO
NO
YES
YES
NO Check the line between IC8001 and IC5103.
Check IC8001 and peripheral circuits.
NO Check the line between IC5103 and SC5201 and SC5202.
Check IC5103 and peripheral circuits.
6 – 3
LC-37D44U