Denon AVR-X4500H Service Manual page 130

3-15. Switcher2 failure detection procedure
HDMI IN
b In order to check, connect the player to the HDMI terminal and configure the player as AVR source.
Next, turn on the power for the player and TV and start playback on the player.
Checking the +5V/DDC status register (HDMI Switcher2)
Check item(3-15.1.). Checking the 5V status register :
Send the following command from Termite.exe.
Send the command "i 0056 00FF 0001".
Case of IN1
Is the return value "88 or 80" ?
(IN2 : "44 or 40", IN3 : "22 or 20", IN4 : "11 or 10")
YES
Go to check item (3-15.3.)
1-4 ZONE2 OUT
Example
i 0056 00FF 0001
88
NO
Check item(3-15.2.). Checking the DDC status register :
Send the following command from Termite.exe.
Case of IN1
Send the command "i 0053 00B4 0001".
Case of IN2
Send the command "i 0053 0084 0001".
Case of IN3
Send the command "i 0053 0054 0001".
Case of IN4
Send the command "i 0053 0024 0001".
Move to the branch destination according to the value returned.
"00 or 04"
(Detection of DDC is not OK.)
"22 or 11"
(Detection of DDC is OK)
130
Example
i 0053 00B4 0001
22
Go to check item (3-15.4.)
Go to check item (3-15.5.)