Looking for DEC RA80 (or RM80, R80) service manual (EK-ORA80-SV or similar)

[Josh Dersch]

On Fri, Oct 18, 2019 at 1:45 PM Antonio Carlini via cctalk <
cctalk at classiccmp.org> wrote:

> On 18/10/2019 05:51, Josh Dersch via cctalk wrote:
> >
> > (I should also note that there is an R80 service manual on Bitsavers -- I
> > misspoke (mistyped?) in my initial e-mail.  It doesn't provide a lot of
> > details on the drive's operation and I was hoping the RA80 or RM80
> manuals
> > might be more detailed...)
>
> I'm guessing you mean AA-M186B-TC "RA80 Maintenance Guide", but if not,
> that's there.
>
> (Assuming I've not mis-typed something, I seem to have a later version,
> AA-M186C-TC, but I've not scanned that).
>
>
> Someone else was looking 10 years ago:
>
>
>
> https://alt.sys.pdp11.narkive.com/gXk9CvKT/looking-for-ra80-service-manual-ek-ora80-sv


Yeah, I saw that while searching as well.  The service documentation that's
available for the R80/RA80 is somewhat useful but lacks detailed technical
information, it's a step above a board-swapping guide for service techs,
basically.

I spent some time yesterday with the schematics (which, annoyingly, don't
match my revision of the boards...) and immediately discovered that the
optical sensor on the spindle wasn't working anymore -- it was definitely
operational when I first started working on it but apparently it gave up
the ghost after running for a few hours.  So at minimum I need to fix that,
there may still be other faults.  The sensor picks up light, but it looks
like the LED light source on the other end of it is dead.  I'm going to
attempt to bodge in a replacement IR LED and see if that's good enough...

Thanks all,
Josh



>
>
>
> but seemingly with no luck.
>
>
> I think the FMPS must be on bitsavers but I hit this first:
>
>
> https://usermanual.wiki/Document/MP01286RA80Mar82.3622064137





>
>
>
> Antonio
>
>
> --
> Antonio Carlini
> antonio at acarlini.com
>
>