search

hanshuebner / ipx-psu-replacement

8 stars 2 forks source link

Accessory AC Power - Potentially Incorrect Interpretation #1

Open trick-1 opened 1 month ago

trick-1 commented 1 month ago

Hi there,

I got 5 boards made for my IPX/IPC/Classic collection.

Brining my 1st board up and I noted that the AC IN and AC OUT are not interpreted the same as on the original PSU.

On my original PSU I can clearly see that there is a path from the Active and Neutral to one side of the relay and then from the otherside of the relay to the accessory power connector. I cannot work out a sound way to wire at this point.

hanshuebner commented 1 month ago

Can you send a couple photos illustrating the problem? Maybe you have a different version of the PSU? Do all the PSUs that you have look the same? I have used the board for three IPXen and they were all the same, but that is just a small sample of course.

trick-1 commented 1 month ago

In the following the brown and white wires come in from the mains. The blue and black wires go out to the accessory socket and are switched by the relay. You can see the mask for the relay on the top side. IMG_4076 On this image you can see the foot print of the relay. on the left of the relay is the input from the mains and on the right is the output to the accessory socket. IMG_4078 ST3 and ST4 are the output to the accessory socket. ST2 and the hole near the word "SAME" are the inputs from the mains. IMG_4079 This is a screen grab of the board from kicad clearly showing no pads on one side of the relay

image

and the schematic

image

Do you get power out of the accessory socket?

hope that helps

hanshuebner commented 1 month ago

The PSUs that I have repaired with the replacement board are different from yours in that they only switch one of the two poles of the auxiliary socket. Given that European sockets generally are not polarized, that could be considered a design flaw. You could try to bodge a couple of wires to make it work, but I'd probably just leave the aux socket unconnected to avoid having to have bodges on the mains side.

Creating another version of the board for this type of power supply would not be hard, but I don't have the need for that myself at this point and also no machine that I could test it with. Do all your PSUs look like this?

trick-1 commented 1 month ago

This is the only unit I have. I have 3 more lunch box machines heading my way so will open them up and take a look when they arrive.

Thanks for the confirmation and insight. Agree bodging AC might not be the best idea and will go with the leave disconnected for the time being.

If I get time I will look at making an update to support.

WildOne69 commented 1 month ago

@hanshuebner I have 3 Classics with these Power Supplies (I'm in the USA) and it is the same PCB as @trick-1 pictures above.

hanshuebner commented 1 month ago

@WildOne69 If you want to send one of your Classics to me, I'd be willing to create a version of the PCB for that PSU type.

WildOne69 commented 1 month ago

@hanshuebner id be willing to send you A defective power supply PCB with the parts removed i would need for a new one but that would depend on what side of the pond you are on.

EDIT: It appears you in Berlin, Germany. I'm in the USA.

hanshuebner commented 1 month ago

@WildOne69 I can't produce something that works without having the system to test it.