Sharp TU-X1U, Service Manual

Page: 38 / 115

TU-X1U
4 – 11
<HDMI input> No video (6)
HDMI: No external input video [INPUT-5] HDMI: No external input video [INPUT-6]
Is INPUT-5 selected on the input select menu screen? Is INPUT-6 selected on the input select menu screen?
YES
NO
YES
NO
Select INPUT-5 on the input select menu screen for
the right input signal. Select INPUT-6 on the input select menu screen
for the right input signal.
Does the HOT PLUG detection function? Does the HOT PLUG detection function?
Does the DDC5V signal come from pin(18) of
SC1601 to pin (32) of IC1604 (HDMI_SW1)? Does the DDC5V signal come from pin (18) of
SC1602 to pin (52) of IC1604 (HDMI_SW1)?
YES
NO
YES
NO
Check the line between the input
terminals of SC1601 and IC1604. Check the line between the input
terminals of SC1602 and IC1604.
Does the HPD signal come from pin (16) of IC1604 to
pin (19) of SC1601? Does the HPD signal come from pin (36) of IC1604
to pin (19) of SC1602?
NO NO
Check the line between IC1604 and
SC1601, and their peripheral cir-
cuits. (Q1602, etc) Check the line between IC1604
and SC1602, and their peripheral
circuits. (Q1603, etc)
Are there the TMDS signal inputs at pins (18/19)(CLK-/+), (21/
22)(D0-/+), (24/25)(D1-/+), (27/28)(D2-/+), all of IC1604
(HDMI_SW1)? Are there the TMDS signal inputs at pins (38/39)(CLK-/+), (41/
42)(D0-/+), (44/45)(D1-/+), (47/48)(D2-/+), all of IC1604
(HDMI_SW1)?
YES
NO
YES
NO
Is IC1601 (EEPROM) accessed by I2C, with HDMI
connected, to read the DDC_I2C SCL/SDA data? Is IC1603 (EEPROM) accessed by I2C, with HDMI
connected, to read the DDC_I2C SCL/SDA data?
NO NO
Check the DDC line and its periph-
eral circuits. (IC1601, IC1606 and
its peripherals). Check the DDC line and its
peripheral circuits. (IC1603,
IC1607 and its peripherals).
Are there the TMDS signal inputs at pins (39/40)(CLK-/+), (43/44)(D0-/+), (47/48)(D1-/+), (51/
52)(D2-/+), all of IC1502 (HDMI_Rx)? NO Check IC1502, IC1604 and their
peripheral circuits.
YES
Are there the HD_DIV[29:0],HD_DVI_CLK_P,HD_DVI_VSYNC,HD_DVI_HSYNC,
HD_DVI_DE signal inputs to IC8001?
HD_DVI
29-20(AN10/AL11/AM10/AN9/AL10/AM9/AN8/AP8/AP7/AL9),
19-10(AM8/AH11/AJ10/AH10/AJ15/AH9/AK8/AH7/AK9/AM7),
9-0(AN6/AL8/AL7/AN5/AP5/AM6/AL6/AP4/AN4/AM5),
HD_DIV_CLK (AK10), HD_DVI_DE (AH12),
HD_DVI_HSYNC (AK11), HD_DVI_VSYNC (AH13) No Check the line between IC1502
and IC8001, and their peripheral
circuits.
YES
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001 (CPU)?
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). NO Check IC8001 and its peripheral
circuits. (IC8151 thru IC8154,
etc.)