TMDS Signal
3.3V
TMDS
Example of waveform in check ① Example of waveform in check ②
When the results of check item (22) are "
22
"
(Detection of DDC is OK.)
Check item(25).
Checking register of the TMDS CLK detection status
register :
Send the following command from Termite.exe.
HDMI Rx/Tx
Send the transmission command "
i 002E 00FF 0001
" from Termite.exe.
When the following value is returned, go to Yes.
HDMI In1 "
44
" HDMI In2 "
22
" HDMI In3 "
11
"
When the following value is returned, go to No.
HDMI In1 "
00
" HDMI In2 "
00
" HDMI In3 "
00
"
Check item(27).
Checking register of the TMDS CLK detection status
register :
Send the following command from Termite.exe.
Send the transmission command "
i 0006 00FF 0001
" from Termite.exe.
When the following value is returned, go to Yes.
"
CC or 44
"
When the following value is returned, go to No.
"
other
"
Check item (26).
Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI In3
93/94/96/97/99/100/102/103pin
HDMI In2
80/81/83/84/86/87/89/90pin
HDMI In1
55/56/58/59/61/62/64/65pin
Checking the TMDS status register (HDMI SW)
Check the TMDS status of the register. (HHDMI SW -> HDMI Rx/Tx)
Example
i 002E 00FF 0001
Example
i 0006 00FF 0001
Check for a short circuit in the pattern of the
TMDS line of the HDMI SW(
IC701
) from the HDMI
input terminal.
If there is no problem, the HDMI SW(
IC701
) is
faulty. Replace with a new device.
HDMI SW(
IC701
) is faulty.
Replace with a new device.
Recheck from
check item (2).
If it does not work, replace the PCB.
YES
YES
YES
NO
NO
NO
YES
Check item (28).
Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
55/56/58/59/61/62/64/65pin
TMDS Signal
3.3V
Example of waveform in check ①
TMDS
Example of waveform in check ②
The HDMI Rx/Tx (
IC721
) is faulty.
Replace with a new device.
HDMI SW(
IC701
) is faulty.
Replace with a new device.
84
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
