Sharp TU-X1U Service Manual page 34

TU-X1U
No video at UHF/VHF broadcast signal reception.
Is the specified TV signal selected on the input select menu screen?
Is there the analog video signal output (VIDEO) at pin (13) of
tuner (TU1101)?
Check TU1101 and its peripheral circuits
(SDA3_5/SCL3_5, etc.).
YES
Is there the analog video signal input at pin (AM19) of
IC8001 (CPU)?
Check the line between IC8001 and TU1101, and
their peripheral circuits (Q1103, etc.).
TU1101 pin (13)
P1101 pin (12)
SC2202 pin (12)
IC8001 pin (AM19)
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
No video (4)
NO
NO
No video at digital broadcast signal reception.
Are there the video signal outputs (IF_OUT_PT/NT) at the pins (19) and (20)
of tuner (TU1101)?
Check TU1101 and its peripheral circuits(SDA3_5/
SCL3_5, etc.).
YES
Are there the video signal inputs at pin (AM33) and (AM34) of IC8001 (CPU)?
Check the line between IC8001 and TU1101, and
their peripheral circuits (L2204, C2229, etc.).
TU1101 pin (19) (P)
P1101 pin (6)
SC2202 pin (6)
IC8001 pin (AM33)
YES
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.
4 – 7
NO
NO
pin (20) (N)
pin (5)
pin (5)
pin (AM34)