Sharp LC-37D64U Service Manual page 48

LC-32/37D64U
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 SC1601
to pin(72) of IC1604(HDMI-SW)?
Check the line between the input terminals
of SC1601 and IC1604.
YES
Does the HPD signal come from pin(56) of IC1604 to
pin(19) of SC1601?
Check the line between IC1604 and
SC1601.
YES
Are there the TMDS signal inputs at pins(58/59)(CLK-/+), (61/62)(D0-/
+), (64/65)(D1-/+), (67/68)(D2-/+), all of IC1604?
Is IC1601(EEPROM) accessed by I2C, with HDMI
connected, to read the DDC_I2C SCL/SDA data?
Check the DDC line and its peripheral circuits. (IC1601
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)?
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
NO
IC1604 pin(56) IC1607 pin(4)
SC1601 pin(19)
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 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 peripherals)
YES
Check IC1604, IC8001 and their peripheral circuits.
Check IC8001 and its peripheral circuits. (IC8151 thru
IC8154, etc.)
NO
Is IC8451(EEPROM for HDCP) accessed by
I2C(SCL2/SDA2) to read HDCP data?
Check IC8451 and its peripheral circuits.
6 – 5
NO
NO
Check the line between the input termi-
nals of SC1602 and IC1604.
NO
Check the line between IC1604 and
SC1602.
IC1604 pin(36) IC1608 pin(4)
SC1602 pin(19)
NO
NO
NO