19 Apr
2005
19 Apr
'05
4:50 p.m.
On Apr 19, 2005, at 2:56 PM, Tom Jennings wrote:
On Tue, 19 Apr 2005, Mark Davidson wrote:
I'll let you know. My understanding is that the machine was working
and functional when it was disconnected (probably around October of
last year). However, I promise not to throw anything out! My big
question is how to remove the front or side panels. I know the front
panels should "pop off", but I tried pulling one or two and they are on
tight.
In any case, you can see photos of the machine in
my garage at
http://homepage.mac.com/medavidson/PhotoAlbum2.html
Cool! Looks like my nova4 setup! I have a 602x tape drive too
(vacuum column). It's likely that the vacuum column switches are
dead, they have a latex membrane. Don't throw them out! I was able
to repair most of mine.
Do you have any media for it?
Not yet. I've had two gracious offers to send me boot tapes, and I'm
also in contact with someone who has a large collection of DG tapes
that will hopefully be able to help. I should have an AOS/VS boot tape
by next week.
My goal is to do the following:
1) Remove the panels and check the connections.
2) Check the boards and make sure they are seated.
3) Pull out the drive and check the heads... and pray they locked the
heads down; once that's verified, I'd unlock them
4) Apply power individually to the units (tape, CPU, disk). Make sure
they power up ok.
5) Connect a terminal and try to get the thing to boot.
Suggestions are most welcome... it's been years since I worked with one
of these beasts. I'm only a "semi" hardware guy... I can do some
checking, but I don't have a lot of diagnostic experience with these
machines.
Mark