Check item(3-11.1.). Check the TMDS CLK detection status of the
register.
Send the following command from Termite.exe.
Send the command "i 0006 00FF 0001".
When the following value is returned, go to Yes.
"C8"
When the following value is returned, go to No.
"other"
Checking the TMDS status register (OSD -> HDMI Rx/Tx)
Example
i 0006 00FF 0001
Check item(3-11.2.). Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI SW [IC721]
42/43/45/46/48/49/51/52pin
IC721
HDMI Rx/Tx [IC721] is faulty.
Replace with a new device.
Recheck from check item (3.3.).
If it does not work, replace the PCB.
OSD [IC731] is faulty.
Replace with a new device.
Check the connection between the HDMI OUT terminal and the TV.
Go to check item (3-11.3.).
YESYES NO
TMDS Signal
3.3V
Example of waveform in check ①
Voltage scale：1.0V/div
Time scale：20ms/div
TMDS
Example of waveform in check ②
Voltage scale：1.0V/div
Time scale：1s/div
NO
3-11. OSD [ADV7623] failure detection procedure
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
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