Sharp LC-60LE831U Service Manual page 74

LC-40/46/52/60LE835U/830U/832U/LC-60LE831U
PC: No external input video [INPUT-8]
Is INPUT-8 selected on the input select menu screen?
NO
Select INPUT-8 on the input select menu screen for the right input signal.
Is IC1504 (HDMI switch) accessed by I2C, with PC connected, to read the VGA_SCL/SDA data?
Check the DDC line and its peripheral circuits. (IC504 and its peripherals).
YES
Are there the video signal inputs at pins (AK15) (G), (AK13) (B) and (AM15) (R) of IC3303 (CPU)?
Are there the VSYNC/HSYNC signal inputs at pins (AM13) and (AL13) 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.
No video (4)
NO
Check the line between SC501 and IC3303.
NO
NO
NO
6 – 10
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)