Sharp LC-60LE831U Service Manual page 71

• Picture does not display.
COMPOSITE: No external input video [INPUT-6]
Is INPUT-6 selected on the input select menu screen?
NO
Select INPUT-6 on the input select menu
screen for the right input signal.
YES
Is there the COMPOSITE signal input at pin (AJ23) of
IC3303 (CPU)?
NO
Check the line between pin (10) of J510
and pin (AJ23) of IC3303.
YES
In LE835U.
Are the LVDS signal input to the pin of P2601?
LVDS0_FPGA_D0P/N (39/40pin), LVDS0_FPGA_D1P/N (37/38pin),
LVDS0_FPGA_D2P/N (35/36pin), LVDS0_FPGA_D3P/N (30/31pin),
LVDS0_FPGA_D4P/N (28/29pin), LVDS0_FPGA_CLKP/N_74MHz (32/33pin),
LVDS1_FPGA_D0P/N (25/26pin), LVDS1_FPGA_D1P/N (23/24pin),
LVDS1_FPGA_D2P/N (21/22pin), LVDS1_FPGA_D3P/N (16/17pin),
LVDS1_FPGA_D4P/N (14/15pin), LVDS1_FPGA_CLKP/N_74MHz (18/19pin).
In LE830U/LE831U/LE832U.
Is the T-CON PWB connected?
VBO_HTPDN(40pin), VBO_LOCKN(39pin) of P2604 become Low if there is no problem
in the connection.
YES
Are the V-By-One signal input to the pin of P2604?
VBO_CN_TXA+/- (36/37pin), VBO_CN_TXB+/- (32/33pin),
VBO_CN_TXC+/- (28/29pin), VBO_CN_TXD+/- (24/25pin).
YES
Check the panel module and harness.
LC-40/46/52/60LE835U/830U/832U/LC-60LE831U
No video (1)
COMPOSITE: No external input video [INPUT-7]
Is INPUT-7 selected on the input select menu screen?
YES
Is there the COMPOSITE signal input at pin (AK22) of IC3303
(CPU)?
YES
NO
NO
NO
6 – 7
NO
Select INPUT-7 on the input select menu
screen for the right input signal.
NO
Check the line between pin (5) of J510 and
pin (AK22) of IC3303.
Check IC3303 and its peripheral circuits.
(IC3501/IC3502, etc)
Check the panel module and harness.
Check IC3303 and its peripheral circuits.
(IC3501/IC3502/IC3503, etc)