LC-32D41U/LC-32M41U/LC-40C32U
6 – 4
<Composite video signal input> No video output (1)
No video output from external input <<INPUT-1>> Select INPUT-1 and the input signal on the input switching menu
screen.
Is INPUT-1 selected on the input switching menu screen? NO When INPUT-1 cannot be selected since the characters INPUT-1
on the menu screen are gray.
YES
Is the video signal detection function normal?
Check between pin 5 of J501 and pin 70 of IC501.
Is video signal fed to pin 65 of IC501 (AV SWITCH)? NO Check between pin 4 of J501 and pin 65 of IC501.
YES
Is video signal sent to pin 60 of IC501? NO Check IC501 (AV SWITCH) and peripheral circuits.
YES
Is video signal sent to pin 2 of IF_UNIT connector (FC_SC501)? NO Check between IC501 and SC501. (Q501, Q502, etc.)
YES
Is video signal fed to pin 2 of MAIN_UNIT connector
(FC_SC1101)?
NO Check the board-to-board cable “FC”.
YES
Is video signal fed to pin 242 of IC3301 (Trident) via L.P.F. com-
posed of Q2201 and Q2207?
NO Check between IC501 and IC3301. (Q2201, Q2207, etc.)
YES
Are digital video (LVDS) signals sent from pins 28-31 and 34-37
of IC3301?
NO Check IC3301 and peripheral circuits.
YES
Check LCD_CONTROL PWB.
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