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800xl power supply - how to open?

Posted: Sat Sep 12, 2020 2:33 pm
by PeteW
Got a power supply for my 800xl. It's an original Atari one but seems to put out 0v on all pins. I want to open the case up but there are no visible screws. I wondered if anyone had some insight into how to open it with minimal damage?

I suspect I'll replace the insides with a usb charger, but would like to keep the look of the original brick

Appreciate the help!
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Re: 800xl power supply - how to open?

Posted: Sun Sep 13, 2020 4:43 pm
by PeteW
Ok I'll answer my own question in case it helps someone else. The PSU is potted (encased in resin), so the base of the casing has posts on it that are embedded in the resin.

I used a chisel to break those off from the inside and then by soaking the main PSU in boiling water several times and applying reasonable levels of brute force, was able to remove the resin block and hollow out the case.

There's now plenty of space to hide a usb charger and the connections to the original cables inside, so it will look original, even if the PSU itself is modern

Re: 800xl power supply - how to open?

Posted: Sun Sep 13, 2020 4:48 pm
by PhilC
Nicely done @PeteW , all tips welcome.