Sharp LC-32R24B Service Manual page 34

LC-32R24B
COMPONENT: No external input video
[INPUT-1]
Is INPUT-1 selected on the input select menu screen?
Is the video signal detection function normal?
Check the line between pin (2) of J502 and pin AC7 of
IC8001
YES
Are component video signals fed to pins AM21, AN21 and AL21
(Y,PB,PR) of IC8001 via each L.P.F composed of capacitor and
inductor between (Q501,Q506,Q504) and (Q515,Q516,Q517)
respectively?
Check the line between each pin of J502 and each
input pin of IC8001.
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 (2)
NO
NO
YES
YES
COMPONENT: No external input video
Is INPUT-3 selected on the input select menu screen?
Is the video signal detection function normal?
Check the line between pin (2) of J509 and pin AE1 of
IC8001
YES
Are component video signals fed to pins AN22, AP22 and AL22
(Y,PB,PR) of IC8001 via each L.P.F composed of capacitor and inductor
between (Q502,Q503,Q505) and (Q518,Q519,Q520) respectively?
Check the line between each pin of J509 and each input pin
of IC8001.
YES
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.
4 – 2
[INPUT-3]
NO
NO
NO