Sharp 60LE920UN, 52LE920UN service manual Video14, PC No external Input video INPUT-3

LC-52LE920UN/LC-60LE920UN
I		.o video14)	I
I	PC: No external	input video [INPUT-3]	I
I Is INPUT-3 selected	on the input select menu	screen?	I

_' NO

Select INPUT-3 on the input select menu screen for the right input signal.

Is IC509 (EEPROM) accessed by 12C, with PC connected, to read the DDC_I2C SCL/SDA data?

Check the DDC line and its peripheral circuits. (IC509 and its peripherals).

YES

Are there the video signal inputs at pins (AK16) (G), (AH15) (B) and (AK17) (R) of IC3302 (CPU)?

Are there the VSYNC/HSYNC signal inputs at pins (AJ14) and (AK14) of IC3302?

_' NO

I Check the line between SC501 and IC3302.

l

YES

Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC3302?

LVDS TX 0 DATA0_P/N (C14/D14), LVDS TX 0 DATAI_P/N (C15/D15),

LVDS TX 0 DATA2_P/N (C16/D16), LVDS TX 0 DATA3_P/N (C18/D18),

LVDS TX 0 DATA4_P/N (C19/D19), LVDS TX 0 CLK P/N (C17/D17),

LVDS TX 1 DATA0_P/N (A14/B14), LVDS TX 1 DATAI_P/N (A15/B15),

LVDS TX 1 DATA2_P/N (A16/B16), LVDS TX 1 DATA3_P/N (A18/B18),

LVDS TX 1 DATA4_P/N (A19/B19), LVDS TX 1 CLK_P/N (A17/B17).

_' NO

I Check IC3302 and its peripheral circuits. (IC3501/IC3502, etc.)

YES

I Check the panel module.

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