Hdmi Ddc Buffer (Isl33003) Failure Detection Procedure - Denon AVR-X6400H Service Manual

3-17. HDMI DDC Buffer (ISL33003) failure detection procedure

Checking operation between the HDMI (HDMI DDC Buffer) and the player
b In order to check, connect the player to the HDMI terminal and configure the player as AVR source.
Check the sound output while turning on the player.
Checking the +5V/DDC status register (HDMI DDC Buffer)
Check item(88). Checking the 5V status register :
Send the following command from Termite.exe.
Send the command "i 0006 00FF 0001".
Check the value.
Move to the branch destination according to the value returned.
"78 or 70"
(Detection of 5V is not OK.)
"F8 or F0"
(Detection of 5V is OK)
Check item(88). Checking the status register :
Send the following command from Termite.exe.
Send the command "i 0003 00B4 0001".
Check the value.
Move to the branch destination according to the value returned.
"00 or 04"
(Detection of DDC is not OK.)
"22"
(Detection of DDC is OK)
135
Example
i 0006 00FF 0001
F8
Go to check item (90)
Example
i 0003 00B4 0001
22
Go to check item (91)
Go to check item (92)