Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: doctorq on October 12, 2003, 09:25:42 AM

Title: I need to make a new A4000 PSU. Can you help me?
Post by: doctorq on October 12, 2003, 09:25:42 AM

Hi

I need to make myself a new PSU for my A4000. I have an old PSU from a PC, and was thinking I could use that.

I have the schematics for the A4000 power connecter from an homepage and compared that with my PC PSU. It looks to me that the P8 connecter contains all the cables for the A4000 connector; the only thing missing is the PWR GND. The wire that's left is an orange one, at the side away from the two GND cables. Can anyone tell me of this is PWR GND. The PC PSU doesn't give me that information, but gives me information about all the other cables.

Title: Re: I need a new A4000 PSU. Can you help me?
Post by: Madgun68 on October 12, 2003, 10:53:46 AM

Does the schematic look like this? (http://www.ntrautanen.fi/computers/hardware/misc/a4000_power.htm)

If so, that is not power ground. It's power good. If you have a power good wire on the PC supply, it connects to the power good on the A4000 connector.

Title: Re: I need a new A4000 PSU. Can you help me?
Post by: doctorq on October 12, 2003, 12:20:21 PM

Ok, my mistake. You have given me the correct link. I had to remember the schematics in the head becuase it's on an other computer, and couldn't remember the inet address.

I don't know if the wire is power good on the PC supply becuase the wire isn't mentioned on the PSU schematics. I tried measuring the voltage in both PSUs and it seem's like being the same voltage, but becuase of my tools I'm not 100% sure.

Title: Re: I need a new A4000 PSU. Can you help me?
Post by: doctorq on October 12, 2003, 04:45:10 PM

What, no one ever made a new PSU for an A4000? Strange

Title: Re: I need a new A4000 PSU. Can you help me?
Post by: Knapster on October 12, 2003, 05:15:20 PM

Look

here (http://home.arcor.de/tbraeuti/Computer/SelfATower.html)

I used the info on this site to convert a 300w AT supply so I could towerise my a4000. Works really well. Use a volt meter to check the values in any case- the colour values are correct - but its always best to check.

Hope that helps

Title: Re: I need a new A4000 PSU. Can you help me?
Post by: doctorq on October 12, 2003, 09:21:47 PM

I made the hack and no problems there. The A4000 bootet up nicely, so now I'm going to install my Voodoo card in it. Thanks for the link

Title: Re: I need a new A4000 PSU. Can you help me?
Post by: Knapster on October 12, 2003, 11:06:55 PM

No worries. Glad it helped.