RK05 stuff

From: Gooijen H <GOOI_at_oce.nl>
Date: Mon Jul 19 03:47:16 2004

Ashley,
perhaps "kicking an open door", but you know that the 4 cards
of the RK11 go in a *dedicated* 4-slot backplane?
*not* in 4 SPC slots of the 11/34 backplane. For more info on
the PDP-11/34, check my website www.pdp-11.nl and click the
11/34 link. There is also some stuff about the floating point
processor and the cache module, including the power distribution
when you want to install both options.
[reminds me, there are still a few missing pictures of the OTT,
over-the-top connectors; somewhere on my (too long) to-do list].

- Henk, PA8PDP.


> -----Original Message-----
> From: cctalk-bounces_at_classiccmp.org
> [mailto:cctalk-bounces_at_classiccmp.org]On Behalf Of Ashley Carder
> Sent: maandag 19 juli 2004 4:44
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: RE: RK05 stuff
>
>
> I reracked these drives into a tall cabinet today so I could
> get to the tops and bottoms of both drives. In the process
> of moving the drives, I unhooked the cable that connects the
> two drives together (drive 0 and drive 1). I decided to
> check the drive that did not have a cable connected to it
> (drive 1), and it magically works now (in standalone mode).
> The drive spins up, the heads move in, no terrible
> sounds or anything like that. The READY and ON-CYL lights
> light up and all appears to be fine. The other drive that
> still has the cables connected to it still didn't spin up.
> I then removed the M930C terminator card from drive 1 and
> put it in drive zero, removed the card that had the
> controller cable attached to it (M993 RK8E cable), and
> powered it up. I then tried loading a pack and this drive
> works too, spins up, moves the heads and lights the READY
> and ON-CYL lights.
>
> Next step is to make sure these drives have the right cards
> to be able to hook up to an RK11 controller (the M993 having
> RK8E written on it doesn't sound good), install the
> RK11 card set in my 11/34 and connect the drives and see
> if RSTS/E recognizes it.
>
> I do suppose that I should do some cleaning on these drives
> because although the foam hasn't turned to goop yet, I do
> see a few small fragments of the foam laying inside the drive
> area that I didn't see before.
>
> Ashley
>
>
> -----Original Message-----
> From: cctalk-bounces_at_classiccmp.org
> [mailto:cctalk-bounces_at_classiccmp.org]On Behalf Of Tony Duell
> Sent: Sunday, July 18, 2004 12:26 AM
> To: cctalk_at_classiccmp.org
> Subject: Re: RK05 stuff (was RE: cctalk Digest, Vol 10, Issue 74)
>
>
> >
> > I've tried both of my RK05 drives. They power on fine. Blower
> > seems to be fine. I put a pack in, press the run switch. The
> > motor never comes on that turns the drive. The same thing
> > happens in both drives. Neither drive will start spinning at
> > all.
> >
> > Any ideas on where to start looking?
>
> Firslty, put a termionator card (M930) into one of the cable
> connector
> slots if the drive is not cabled up anyway with a terminator
> in the 'out'
> slot of the last drive. I seem to rememebr that RK05s do odd
> things if
> they're not terminated (and you might also want to try it
> with the drive
> disconnected from the controller, with just a terminator, in
> case it's
> something like the ACLO/DCLO lines on the bus being asserted).
>
> Now, the spindle motor is controlled by a relay on top of the
> PSU. From
> what you say in another message that relay is never being
> energised. The
> next thing to do is to trace the relay coil signal back to
> the logic and
> to find out what has to be asserted for the relay to pull in. There's
> certainly an interlock switch circuit -- 2 switches in series
> IIRC that
> detect that there's a pack in and the door is closed.
> Obviosuly the RUN
> switch has to be on. And I think there's some kind of power-OK line.
> Maybe more. Now find out which (if any) of those signals are
> not being
> asserted (if all of them are, then trace through the logic itself, of
> course), and find out why not. Maybe just a switch that's not
> closing,
> maybe more.
>
> If you need more help, I'll dig out the prints, but it's a
> little late to
> do that tonight :-)
>
> -tony
>
>
Received on Mon Jul 19 2004 - 03:47:16 BST