Sharp LC-52SE94U Service Manual page 55

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 sig-
nal.
Does the HOT PLUG detection function?
Does the DDC5V signal come from pin(18) of SC1602 to pin(52) of
IC1604(HDMI-SW)?
YES
Does the HPD signal come from pin(36) of IC1604 to pin(19) of
SC1602?
YES
Are there the TMDS signal inputs at pins(38/39)(CLK-/+), (41/42)(D0-/+), (44/45)(D1-/+),
(47/48)(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 peripher-
YES
als).
Are there the TMDS signal inputs at pins(AM1/AM2)(CLK-/+), (AN1/AN2)(D0-/+), (AM3/
AM4)(D1-/+), (AP2/AN3)(D2-/+), all of IC8001(CPU)?
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 signal input] No video (5)
NO
NO
Check the line between the input terminals of
SC1602 and IC1604.
NO
Check the line between IC1604 and SC1602.
IC1604 pin(36) IC1608 pin(4)
SC1602 pin(19)
NO
NO
YES
YES
6 – 6
LC-52SE94U/LC-52SE941U/LC-65SE94U
NO Check IC1604, IC8001 and their periph-
eral circuits.
Check IC8001 and its peripheral circuits.
(IC8151 thru IC8154, etc.)
Is IC8451(EEPROM for HDCP) accessed
NO
by I2C(SCL2/SDA2) to read HDCP data?
Check IC8451 and its peripheral circuits.