Denon AVR-X2300W Service Manual page 105

3-6 HDMI SW IC (TMDS261B) failure detection procedure
Check the TMDS status of the register. (HDMI SW -> GUI)
Check item(60). Check the TMDS CLK detection status of the regis-
ter. :
Send the following command from Termite.exe.
Send the command "i 00E2 0004 0001".
"02" : Go to Yes.
"other" : Go to No.
NO
Check item(61). Checking the TMDS input. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
YES
The GUI (U1026) is faulty.
Replace with a new device.
Recheck from check item (6).
If it does not work, replace the PCB.
Example
YES
The GUI (U1026) is faulty.
Replace with a new device.
Recheck from check item (6).
If it does not work, replace the PCB.
3.3V
TMDS Signal
Example of waveform in check ①
TMDS
Example of waveform in check ②
NO
HDMI SW(U1103) is faulty.
Replace with a new device.
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