Sharp LC-90LE740X

LC-90LE740X
6 – 12
No video (2)
COMPONENT: No external input video [INPUT-5]
Is INPUT-5 selected on the input select menu screen?
Is the INPUT-SELECT for the input signal?
YES
NO
Select INPUT-5 on the input select menu screen for the right
input signal.
Is "COMPONENT" selected on the input select menu screen?
NO
Select "COMPONENT" on the input menu screen for the
right input signal.
YES
Are there the COMPONENT video signal inputs at pins(AU26/AP25)(Y)/(AR26)(Pb) and (AP26)(Pr) of IC3301(CPU)?
YES
NO
Check the line between the input terminals of J513 and IC3301.
J513 pin(1)(Y) pin(2)(Pb) pin(3)(Pr)
IC3301 pin(AU26/AP25) pin(AR26) pin(AP26)
Is the T-CON PWB connected?
VBO_HTPDN pin (40) of SC3801 become Low if there is no problem in the connection.
NO Check the T-CON PWB and harness.
Check IC3301 and SC3801 and their periph-
eral circuits in Main PWB.
YES
Are the V-By-One HS signal input to the pin of SC3801?
VBO_CN_TXA+/- (36/37pin), VBO_CN_TXB+/- (32/33pin),
VBO_CN_TXC+/- (28/29pin), VBO_CN_TXD+/- (24/25pin).
NO Check IC3301 and its peripheral circuits.
(IC3501/IC3502/IC3503/IC3504, etc.)
YES
Check the panel module and harness.