Lc-32Le280X - Sharp LC-32LE280X Service Manual

LC-32LE280X/LC-40LE280X
With [RF] signal input
No video in the UHF/VHF reception
Is there IF output from the tuner pin( 6,7 ) of TU1102 as
specified ?
Is there IF input at pin 16 & 17 of IC3301 ?
Are there the signal outputs pin (78-95 ) of IC3301 to SC3802
(32") / SC3801 (40" ) ?
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 elected on the input select menu screen?
3s
Is there the video signal input at pin (6) of IC3301?
Are there the signal outputs pin ( 137-146 ),Pin(149-154),
Pin(78-95)of IC3301 to SC3801(32")/SC3802(40")
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
No video onscreen (1)
NO
YES
N
YES
YES
No video onscreen (2)
YES
YES
YES
Check TU1102 and its peripheral circuits.
O C h c e t k e h c c r i t i u e b w t e n e
NO
Check IC3301 and its peripheral circuit to SC3802
(32")/SC3801(40")
NO
Select INPUT 3 on the input select menu screen to pick
up the right input signal.
NO Check the line between pin (2) of J502 and pin (6) of IC3301.
NO Check IC3301 and its peripheral circuits to SC3802 (32") /
SC3801(40")
4 – 2
T U 1 1 2 0 & C I 3 0 3 . 1