Sharp LC-32LE260M Service Manual page 8

With [RF] signal input
No video in the UHF/VHF reception
Is there IF output from the tuner pin( 8 ) of TU1101 as specified?
Is there VIF input at pin 51 & 52 of IC3301?
Are there the signal outputs of IC3301(pin 33) ?
Are there LVDS signal outputs from IC3301 at pin 61-64
?
and pin 66-71
YES
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
With <Video> signal input
No external input video onscreen <INPUT 3>
Is INPUT 3 selected on the input select menu screen?
Is there the video signal input at pin (31 ) of IC3301?
Are there LVDS signal outputs of IC3301 at pin 61-64 and pin
66-71
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
No video onscreen (1)
YES
YES
YES
No video onscreen (3)
YES
YES
YES
NO Check TU1101 and its peripheral circuits.
NO Check the circuit between TU1101 & IC3301.
NO Check IC3301 and its peripheral circuit.
NO Check IC3301 and its peripheral circuit.
NO Select INPUT 3 on the input select menu screen to pick up the
right input signal.
NO Check the line between pin (7) of TL509 and pin (31) of IC3301.
NO Check IC3301 and its peripheral circuits.
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LC-32LE260M