Sharp LC-42D65U Service Manual page 48

LC-42D65U
HDMI: No external input video [INPUT-9]
Is INPUT-9 selected on the input select menu screen?
Select INPUT-9 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 SC1801 to pin(AJ10) of
IC8001(CPU)?
Check the line between the input terminals of
SC1801 and IC8001. (Q1802, etc.)
Check the line between the pin(AL9) and (AL3) of
IC8001.
YES
Does the HPD signal come from pin(50) of IC1804 to pin(19) of SC1801?
Check the line between the pin(50) of IC1804 and the
pin(19) of SC1801. (Q1801, etc.)
Check the line between the pin(31) of IC1804 and the
pin(AL2) of IC8001.
YES
Are there the TMDS signal inputs at pins(53/54)(CLK-/+), (56/57)(D0-/+),
(59/60)(D1-/+), (62/63)(D2-/+), all of IC1804?
Is IC1801(EEPROM) accessed by I2C, with HDMI
connected, to read the DDC_I2C SCL/SDA data?
Check the DDC line and its peripheral circuits.
(IC1801 and its peripherals)
YES
Are there the TMDS signal inputs at pins(AM1/AM2)(CLK-/+), (AN1/
AN2)(D0-/+), (AM3/AM4)(D1-/+), (AP2/AN3)(D2-/+), all of IC8001(CPU)?
Check IC1804, IC8001 and their peripheral circuits.
YES
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001?
LVDS_TX_0_DATA0_P/N(C7/B7), LVDS_TX_0_DATA1_P/N(E7/D7), LVDS_TX_0_DATA2_P/N(C6/B6), LVDS_TX_0_DATA3_P/N(C5/B5),
LVDS_TX_0_DATA4_P/N(E5/D5), LVDS_TX_0_CLK_P/N(E6/D6),
LVDS_TX_1_DATA0_P/N(B4/A4), LVDS_TX_1_DATA1_P/N(E4/D4), LVDS_TX_1_DATA2_P/N(B3/A3), LVDS_TX_1_DATA3_P/N(B1/B2),
LVDS_TX_1_DATA4_P/N(F5/F6), LVDS_TX_1_CLK_P/N(C2/C3),
Check the panel module.
[HDMI input] No video (6)
NO
NO
NO
NO
NO
NO
YES
6 – 8
NO
Check IC8001 and its peripheral circuits. (IC8151 thru
IC8154, etc.)
Is IC8451(EEPROM for HDCP) accessed by I2C(SCL2/
SDA2) to read HDCP data?
Check IC8451 and its peripheral circuits.