Sharp LC-42D65U Service Manual page 47

HDMI: No external input video [INPUT-7]
Is INPUT-7 selected on the input select menu screen?
Select INPUT-7 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 SC1603 to pin(AN10) of
IC8001(CPU)?
Check the line between the input terminals of
SC1603 and IC8001. (Q1606, etc.)
Check the line between the pin(AN8) and (AG4)
of IC8001.
YES
Does the HPD signal come from pin(64) of IC1604 to pin(19) of SC1601?
Check the line between the pin(64) of IC1604
and the pin(19) of SC1601. (Q1605, etc.)
Check the line between the pin(31) of IC1604
and the pin(AF8) of IC8001.
YES
Are there the TMDS signal inputs at pins(4/5)(CLK-/+), (7/8)(D0-/+), (10/
11)(D1-/+), (13/14)(D2-/+), all of IC1604?
Is IC1603(EEPROM) accessed by I2C, with
HDMI connected, to read the DDC_I2C SCL/
SDA data?
Check the DDC line and its peripheral circuits.
(IC1603 and its peripherals)
YES
Are there the TMDS signal inputs at pins(AH2/AH1)(CLK-/+), (AH3/
AH4)(D0-/+), (AJ1/AJ2)(D1-/+), (AJ3/AK2)(D2-/+), all of IC8001(CPU)?
Check IC1604, IC8001 and their peripheral cir-
cuits.
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
HDMI: No external input video [INPUT-8]
Is INPUT-8 selected on the input select menu screen?
Select INPUT-8 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 SC1804 to pin(AH11)
of IC8001(CPU)?
Check the line between the input terminals of
SC1804 and IC8001. (Q1810, etc.)
Check the line between the pin(AL9) and (AL3) of
IC8001.
YES
Does the HPD signal come from pin(35) of IC1804 to pin(19) of
SC1804?
Check the line between the pin(35) of IC1804
and the pin(19) of SC1804. (Q1809, 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(38/39)(CLK-/+), (41/
42)(D0-/+), (44/45)(D1-/+), (47/48)(D2-/+), all of IC1804?
Is IC1805(EEPROM) accessed by I2C, with
HDMI connected, to read the DDC_I2C SCL/
SDA data?
Check the DDC line and its peripheral circuits.
(IC1805 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 cir-
cuits.
YES
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.
6 – 7
LC-42D65U
NO
NO
NO
NO
NO
NO
NO