AK6DN
Veteran Member
cmd=7777 unit=1 den=D implies the serial bidirectional data line is stuck high...
I am thinking the same way that the current backplane could be not a right one. I will try to get H9276 backplane for the next step. Thank you for your comments.Does not the DDV11-B only have 18 address lines?
Currently, AXT power supply is used to power the system and the entire AXT front control panel is built per https://avitech.com.au/?page_id=1657Also when electronics have a weird behavior it's often the power supply that is not providing enough power.
I cannot see these information.Cmao, please could you post a photo of the back of the backplane, especially where there are markings such as "part N° H123456"?
You meant there are problems on backplane sockets?A faulty power connector...
Ok. I will do a research or inspection to my power system.The M8189 alone takes 4.5 to 5.5 A.
Let's say three cards take 15-20A, that is not a lot for ATX power supplies.
Check your connections, as Dave suggested, starting from the ATX power supply and then at each point until the ICs.
A drop of 0.6V under 5A means only a resistance of 0.12Ohms.