Sharp LC-32LE250M Service Manual page 20

LC-32LE250M
With <Component> signal input
No external input video onscreen <INPUT 2>
Is INPUT 2 selected on the input select menu screen?
Are there the Y, Pb and Pr signal inputs at pins (13), (11) and
(15 ) of IC 3301 respectively?
Is input waveform of IC3301 normal?
Y=(13) pin, Pb=(11) pin, Pr=(15) pin
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
With <HDMI> signal input
No external input video onscreen <INPUT 1>.
Is INPUT 1 selected on the menu screen?
Are there signal outputs from SC1501 to IC3301?
Are there signal outputs of IC3301?
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
No video onscreen (2)
YES
YES
YES
No video onscreen (4)
YES
YES
YES
NO Select INPUT 2 on the input select menu screen to pick up the
right input signal.
NO Check the line between pins (6) /(14)/(18) of TL563 and pins
(13)/ (11) /(15 )of IC3301.
NO Check IC3301 and its peripheral circuits.
NO Select INPUT 1 on the input select menu screen to pick up the
right signal input.
NO Check peripheral circuits between SC1501 and IC3301.
NO Check IC3301 and its peripheral circuits.
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