Hello everyone!
Electrical engineering is not my specialty, so I apologize in advance if this is incredibly simple.
I have a backplane to a HP Proliant that I am attempting to reverse engineer to follow the ATX standard. There are 12 control wires that normally would connect to the motherboard.
Now there are two sets of pins. The pins that connect the PCB to the power supply, And the 12 pins that connect to the wires (which connect to the motherboard)
Pin 9 of the power supply/PCB is the PS_ON signal, which when grounded powers up the two power supplies. I am trying to find which pin it connects to on the PCB/Motherboard side. I need to utilize those wires, in a way that I can ground a single wire to power them both up.
I've tried obviously grounding them all out to try and find the wire needed, but it doesn't work. I'm wondering if I need another wire grounded or something.
My reason behind this, and why I don't just solder a wire to pin 9 on the power supply/PCB and use that is because these backplane boards are active/passive failover, and I need to be sure if something were to happen to one PSU, that the other would be able to take over properly.
Now Pin 9 on the power supply/PCB seems to be the power on, and if I ground it, it will power on the power supply. I traced it up to this cluster of resisters, but don't posses the knowledge to follow where it goes from there:
http://i.imgur.com/KnX9pP9.jpg
The PS_ON (Pin 9) ends where the two arrows are.
Here are some additional pictures:
http://i.imgur.com/POonsRQ.jpg
http://i.imgur.com/r3oWXtA.jpg
http://i.imgur.com/nZqfroQ.jpg
http://i.imgur.com/TYYrvZf.jpg
I have pretty basic skills. If you need me to continuity test anything, or if you need to know anything else, I will absolutely be happy to help!!
THANK YOU!!!!
Electrical engineering is not my specialty, so I apologize in advance if this is incredibly simple.
I have a backplane to a HP Proliant that I am attempting to reverse engineer to follow the ATX standard. There are 12 control wires that normally would connect to the motherboard.
Now there are two sets of pins. The pins that connect the PCB to the power supply, And the 12 pins that connect to the wires (which connect to the motherboard)
Pin 9 of the power supply/PCB is the PS_ON signal, which when grounded powers up the two power supplies. I am trying to find which pin it connects to on the PCB/Motherboard side. I need to utilize those wires, in a way that I can ground a single wire to power them both up.
I've tried obviously grounding them all out to try and find the wire needed, but it doesn't work. I'm wondering if I need another wire grounded or something.
My reason behind this, and why I don't just solder a wire to pin 9 on the power supply/PCB and use that is because these backplane boards are active/passive failover, and I need to be sure if something were to happen to one PSU, that the other would be able to take over properly.
Now Pin 9 on the power supply/PCB seems to be the power on, and if I ground it, it will power on the power supply. I traced it up to this cluster of resisters, but don't posses the knowledge to follow where it goes from there:
http://i.imgur.com/KnX9pP9.jpg
The PS_ON (Pin 9) ends where the two arrows are.
Here are some additional pictures:
http://i.imgur.com/POonsRQ.jpg
http://i.imgur.com/r3oWXtA.jpg
http://i.imgur.com/nZqfroQ.jpg
http://i.imgur.com/TYYrvZf.jpg
I have pretty basic skills. If you need me to continuity test anything, or if you need to know anything else, I will absolutely be happy to help!!
THANK YOU!!!!
