It's a design feature.
They burn out self-destructively, clearing the fault and signalling the
loss of cable-borne RFI suppression.



On Sun, Jun 16, 2024 at 11:55 AM D. Resor via cctalk <cctalk@classiccmp.org>
wrote:

> I reached out to the seller and explained that it may have been AC line
> capacitors which went up in smoke etc, and why it's always a bad idea to
> "just plug it in" and power it on without some knowledge to remove the
> cover and make a visual inspect first.
>
> Yes, I found the same info searching online. It's a Z80 box which can run
> the proprietary O/S which Litton-Monroe furnished or C/PM.
>
> A nice looking piece of equipment but nothing special.
>
> The cursor key layout could have been laid out in a more user friendly way.
>
> Don Resor
>
> -----Original Message-----
> From: Chuck Guzis via cctalk <cctalk@classiccmp.org>
> Sent: Saturday, June 15, 2024 9:58 PM
> To: D. Resor via cctalk <cctalk@classiccmp.org>
> Cc: Chuck Guzis <ccl...@sydex.com>
> Subject: [cctalk] Re: The magic smoke....
>
> On 6/15/24 21:51, D. Resor via cctalk wrote:
> > Seems this eBay seller let the magic smoke get out, then proceeded to
> > power it on again one hour later.
> >
> > Litton Monroe OC 8820
> >
> > https://www.ebay.com/itm/355793400092
> >
> > See the description..
>
> Probably due to the failed film-in-oil (sometimes known as Rifa) line
> filter capacitors--a very common failure and nonfatal.
>
> My recollection of these machines is that they are a basic Z80 CP/M box--I
> do have samples of these floppies in my archives.
>
> So nothing special, AFAIK.
>
> --Chuck
>
>
>

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