[vcf-midatlantic] Personal IRIS PSU repair

[Joseph Marlin]

> Have you found a schematic diagram for it?
>
> Mike Rosen

Did a lot of searching and came up with bupkis

>   The Indigo2 power supplies fail from 4 certain caps that go bad. Not
> sure about the Personal IRIS machines but tons of vintage electronics
> suffer problems from them and it's usually a general first check.

Yeah, probably something I should just do anyway.
There's a very fun spot where there are four caps soldered directly into two rails of sheet metal that I don't particularly look forward to dealing with...
Thanks for the info, on the Indigo 2!
________________________________
From: Ethan O'Toole <telmnstr at 757.org>
Sent: Wednesday, February 17, 2021 4:07 PM
To: Joseph Marlin via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org>
Cc: Joseph Marlin <j.marlin at outlook.com>
Subject: Re: [vcf-midatlantic] Personal IRIS PSU repair


Hello,


   Step #1, replace all the electrolytic capacitors. They dry up over time.
105c Nichicon or Panasonic from a source like Digikey, Mouser, AVNet,
Newark is top of the line. Can go with cheaper 85c caps from the same
sources. eBay and Amazon might be fakes.

   The Indigo2 power supplies fail from 4 certain caps that go bad. Not
sure about the Personal IRIS machines but tons of vintage electronics
suffer problems from them and it's usually a general first check.

   A low rent want to test them is warm it all up with a hair dryer and
sometimes they will start to work, but that isn't a given just a hack.

                       - Ethan


> Hey, all.
>
> Just thought I'd reach out and bother everyone to see if there's anyone else out there who's dealt with a dead Personal IRIS PSU.
>
> Apparently they pretty much all go eventually, but I haven't been able to find anything about what the common failure modes are.
>
> Hoping there's someone with some thoughts or experience, because I'm massively a novice when it comes to power supply diagnosis.
>