Sharp Aquos LC-42BX5H, Руководство по обслуживанию

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LC-42BX5H/M/X
6 – 5
With <Component> signal input No video onscreen (4)
No external input video onscreen <INPUT 1>
Is INPUT 1 selected on the input select menu screen?
NO Select INPUT 1 on the input select menu screen to pick up the
right input signal.
YES
Are there the Y, Pb and Pr signal inputs at pins (25), (1) and (5)
of IC3402 (Component SW), respectively? NO Check the line between pins (10)/(6)/(4) of J3404 and pins (25)/
(1)/(5) of IC3402.
YES
Is input waveform of IC802 normal?
Y=U1pin, Sync=J2pin
Pb=L1pin, Pr=R1pin NO Check IC3402 and its peripheral circuits.
YES
Are there the signal outputs at pins U22, U23, V22, V23, P22,
P23, R22, R23, T22, T23 of IC801, respectively? NO Check IC801 and its peripheral circuits.
YES
Check LVDS cable, LCD controller (IN PANEL) and their periph-
eral circuits.
With <Component> signal input No video onscreen (5)
No external input video onscreen <INPUT 2>
Is INPUT 2 selected on the input select menu screen?
NO Select INPUT 2 on the input select menu screen to pick up the
right input signal.
YES
Are there the Y, Pb and Pr signal inputs at pins (27), (3) and (7)
of IC3402 (Component SW), respectively? NO Check the line between pins (10)/(6)/(4) of J3404 and pins (27)/
(3)/(7) of IC3402.
YES
Is input waveform of IC802 normal?
Y=U1pin, Sync=J2pin
Pb=L1pin, Pr=R1pin NO Check IC3402 and its peripheral circuits.
YES
Are there the signal outputs at pins U22, U23, V22, V23, P22,
P23, R22, R23, T22, T23 of IC801, respectively? NO Check IC801 and its peripheral circuits.
YES
Check LVDS cable, LCD controller (IN PANEL) and their periph-
eral circuits.