Sharp TU-X1U Service Manual page 42

TU-X1U
PC: No external input video [INPUT-9]
Is INPUT-9 selected on the input select menu screen?
Select INPUT-9 on the input select menu screen for the right input
signal.
Is IC2202 (EEPROM) accessed by I2C, with PC connected, to
read the DDC_I2C SCL/SDA data?
Check the DDC line and its peripheral circuits. (IC2202 and its
peripherals).
YES
Are there the video signal inputs at pins (AN15)(G), (AM15)(B) and (AK16)(R) of
IC8001 (CPU)?
Are there the VSYNC/HSYNC signal inputs at pins (AJ16) and (AH16) of IC8001?
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).
YES
Are the LVDS signal inputs at the LVDS 1st channel and 2nd channel of
IC4601(FPGA)?
LVDS_TX_0_DATA0_P/N (T3/R3), LVDS_TX_0_DATA1_P/N (T5/T4),
LVDS_TX_0_DATA2_P/N (R7/T7), LVDS_TX_0_DATA3_P/N (R11/P11),
LVDS_TX_0_DATA4_P/N (T13/R13), LVDS_TX_0_CLK_P/N (P9/N9),
LVDS_TX_1_DATA0_P/N (B14/A14), LVDS_TX_1_DATA1_P/N (B13/A13),
LVDS_TX_1_DATA2_P/N (A9/A10), LVDS_TX_1_DATA3_P/N (A4/A5),
LVDS_TX_1_DATA4_P/N (C3/B3), LVDS_TX_1_CLK_P/N (A8/B8).
YES
Are the Parallel Video Signal inputs at the pins of IC4504 (HDMI_Tx)?
HDMITX_G9-0 pin (71/72/73/74/75/77/78/79/80/81),
HDMITX_B9-0 pin (84/85/86/90/91/92/93/94/95/96),
HDMITX_R9-0 pin (56/57/58/59/60/61/62/63/67/68),
HDMITX_CLK pin (88), HDMITX_DE pin (1), HDMITX_HD pin (2), HDMITX_VD
pin (3)
YES
Does the HOT PLUG detection function?
Is the DDC5V signal output at the pin (18) of SC4501 (HDMI_OUTPUT)?
YES
Does the HPD signal come from pin (19) of SC4501 (HDMI_OUTPUT) to pin (51)
of IC4504 (HDMI_Tx)?
YES
Are there the TMDS signal outputs at pins (12/10)(CLK-/+), (9/7)(D0-/+), (6/4)(D1-
/+), (3/1)(D2-/+), all of SC4501 (HDMI_OUTPUT)?
YES
Check the HDMI cable and Monitor Unit.
No video (8)
NO
4 – 15
NO Check the line between SC2201 and IC8001,
and their peripheral circuits (Q2210 thru Q2212,
IC2201, etc.).
NO Check IC8001 and its peripheral circuits (IC8151
thru IC8154, etc.).
NO Check the line between IC8001 and IC4601, and
their peripheral circuits.
NO Check the line between IC4601 and IC4504, and
their peripheral circuits.
NO Check the line between SC4501 and IC4503,
and their peripheral circuits.
NO Check the line between SC4501 and IC4504,
and their peripheral circuits.
Check the HDMI cable and Monitor Unit.
NO Check the line between SC4501 and IC4504,
and their peripheral circuits.