Sharp LC-40D68UT Service Manual page 53

HDMI: No external input video [INPUT-5]
Is INPUT-5 selected on the input select menu screen?
Select INPUT-5 on the input select menu screen for
the right input signal.
YES
Does the INPUT-1 C1_PLUG detection function?
Does the DDC5V signal come from pin (18) of SC1602 to pin (B18)
of IC8001 (CPU)?
Does the HPD signal come from pin (W16) of IC8001 to pin (19) of
SC1602?
Check the line between the input terminals of SC1602
and IC8001 and their peripheral circuits.
YES
Do the DDC_I2C signals come from pins (15/16) (DDC_SCL/
DDC_SDA) of SC1602 to pins (A18/A19) of IC8001 (CPU)?
Are there the TMDS signal inputs at pins (H21/H20) (CLK-/+),
(G21/G22) (D0-/+), (F21/F22) (D1-/+), (G20/G19) (D2-/+), all of
IC8001?
Check the line between the input terminals of SC1602
and IC8001 and their peripheral circuits.
Check IC1611 (EEPROM of EDID) and its peripheral
circuits.
(DDC_SCL: pin5, DDC_SDA: pin6, all of IC1611)
YES
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of
IC8001?
LV0OUT0P/M (N19/N20), LV0OUT1P/M (N21/N22), LV0OUT2P/M (P19/P20),
LV0OUT3P/M (R19/R20), LV0OUT4P/M (R21/R22), LV0CK0P/M (P21/P22),
LV1OUT0P/M (J21/J22), LV1OUT1P/M (K19/K20), LV1OUT2P/M (K21/K22),
LV1OUT3P/M (L21/L22), LV1OUT4P/M (M21/M22), LV1CK0P/M (L19/L20)
YES
Check the panel module.
<HDMI input> No video (4)-1
NO
NO
NO
6 – 4
HDMI: No external input video [INPUT-6]
Is INPUT-6 selected on the input select menu screen?
Select INPUT-6 on the input select menu screen for the right
input signal.
YES
Does the HOT PLUG detection function?
Does the DDC5V signal come from pin (18) of SC1601 to pin (A17) of
IC8001 (CPU)?
Does the HPD signal come from pin (W17) of IC8001 to pin (19) of
SC1601?
Check the line between the input terminals of SC1601 and
IC8001 and their peripheral circuits.
YES
Do the DDC_I2C signals come from pins (15/16) (DDC_SCL/DDC_SDA)
of SC1601 to pins (D16/D17) of IC8001 (CPU)?
Are there the TMDS signal inputs at pins (D20/D19) (CLK-/+), (E21/E20)
(D0-/+), (D22/D21) (D1-/+), (C22/C21) (D2-/+), all of IC8001?
Check the line between the input terminals of SC1602 and
IC8001 and their peripheral circuits.
Check IC1610(EEPROM of EDID) and its peripheral circuits.
(DDC_SCL: pin5, DDC_SDA: pin6, all of IC1610)
YES
NO Check IC8001 and its peripheral circuits.
(IC8251, etc.)
LC-40D68UT
NO
NO
NO