[vcf-midatlantic] Personal IRIS PSU repair

Bill Degnan billdegnan at gmail.com
Wed Feb 17 22:07:24 UTC 2021


Herb Johnson of VCFed has in the past done this work, he may have the parts
and he certainly has the expertise if you want to hire him for the job.
Bill

On Wed, Feb 17, 2021 at 4:22 PM Joseph Marlin via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> > 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.
> >
>


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