Sharp LC-46D64U Service Manual page 45

HDMI: No external input video [INPUT-4]
Is INPUT-4 selected on the input select menu screen?
Select INPUT-4 on the input select menu screen for
the right input signal.
Does the HOT PLUG detection function?
Does the DDC5V signal come from pin (18) of SC801
to pin (72) of IC1604 (HDMI-SW)?
YES
Does the HPD signal come from pin (56) of IC1604 to
pin (19) of SC801?
YES
Are there the TMDS signal inputs at pins (27/28) (CLK-/+), (29/30) (D0-/
+), (32/33) (D1-/+), (34/35) (D2-/+), all of IC803?
Is IC802 (EEPROM) accessed by I2C, with HDMI
connected, to read the DDC_I2C SCL/SDA data?
Check the DDC line and its peripheral circuits. (IC801
and its peripherals).
YES
Are there the TMDS signal inputs at pins (58/59) (CLK-/+), (61/62) (D0-/
+), (64/65) (D1-/+), (67/68) (D2-/+), all of IC1604?
Check the TMDS line between IC803 and IC1604
(SC802 and SC1603, etc.).
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)?
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 termi-
nals of SC801 and IC1604.
SC801 pin(18) IC801 pin(39)
SC802 pin(19) SC1603 pin(3)
IC1604 pin(72)
NO
Check the line between IC1604 and
SC801.
IC1604 pin(56) SC1603 pin(4)
SC802 pin(18) IC801 pin(25)
IC807 pin(4) SC801 pin(19)
NO
NO
NO
YES
YES
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.
Does the HOT PLUG detection function?
Does the DDC5V signal come from pin (18) of SC1601
to pin (32) of IC1604 (HDMI-SW)?
YES
Does the HPD signal come from pin (16) of IC1604 to
pin (19) of SC1601?
YES
Are there the TMDS signal inputs at pins (18/19) (CLK-/+), (21/22)
(D0-/+), (24/25) (D1-/+), (27/28) (D2-/+), all of IC1604?
Is IC1601 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C SCL/SDA data?
Check the DDC line and its peripheral circuits. (IC1601
and its peripherals).
YES
NO
NO
4 – 5
LC-42D64U/46D64U/52D64U
NO
NO
Check the line between the input terminals
of SC1601 and IC1604.
NO
Check the line between IC1604 and
SC1601.
IC1604 pin(16) IC1607 pin(4)
SC1601 pin(19)
NO
NO
Check IC1604, IC8001 and their peripheral
circuits.
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.