Sharp TU-X1U Service Manual page 47

INPUT-4 No audio (HDMI connected)
INPUT-5 No audio (HDMI connected)
INPUT-6 No audio (HDMI connected)
INPUT-7 No audio (HDMI connected)
INPUT-8 No audio (HDMI connected)
[INPUT-4 input]
Is INPUT-4 selected on the input select menu screen?
[INPUT-5 input]
Is INPUT-5 selected on the input select menu screen?
[INPUT-6 input]
Is INPUT-6 selected on the input select menu screen?
[INPUT-7 input]
Is INPUT-7 selected on the input select menu screen?
[INPUT-8 input]
Is INPUT-8 selected on the input select menu screen?
YES
[INPUT-4 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-4]".
[INPUT-5 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-5]".
[INPUT-6 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-6]".
[INPUT-7 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-7]".
[INPUT-8 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-8]".
YES
Does the SPDIF signal come from pin (78) of IC1502 (HDMI_Rx) to pin (AM11/
AN11)(SPDIF_IN_N/SPDIF_IN_P) of IC8001 (CPU)?
YES
Does the I2S signal come from pins (AL24)(DSP_MCLK1), (AK25)(DSP_BCKIN1),
(AJ25)(DSP_LRCK1), (AL25)(DSP_SDIN1) of IC8001 (CPU) to pins (5), (11), (10), (9) of
IC4504 (HDMI_Tx)
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 audio (4)
NO
NO
NO
NO
NO
NO
4 – 20
TU-X1U
Is the audio output selected for "VARI-
ABLE" on the menu screen?
Set the audio output to "FIXED".
Check the line between IC8001 and
IC1502, and their peripheral circuits.
Check the line between IC8001 and
IC4504, and their peripheral circuits.
Check the line between SC4501 and
IC4503, and their peripheral circuits.
Check the line between SC4501 and
IC4504, and their peripheral circuits.
Check the HDMI cable and Monitor Unit.
Check the line between SC4501 and
IC4504, and their peripheral circuits.