2100 at smecc

From: ed sharpe <esharpe_at_uswest.net>
Date: Sat Sep 11 23:02:01 2004

Hi Jay...yes we had discussed the 7905 7906 issue... I think yu had
indicated that the 06 only will look like the 05 though.... have you ever
tried a 7925 or a 7920? they probably would only address out as a 05
also... but...

yes the power supplies should be tested on the 2100's first.... I work best
with a wicker basket of parts to sub after that point though.
Thanks Ed Sharpe archivist for SMECC

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glendale az 85301

----- Original Message -----
From: "Jay West" <jwest_at_classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic Posts"
Sent: Thursday, September 09, 2004 8:37 PM
Subject: 2100 at smecc

>> hi jay need a drive 2883 or a controller and a 79xx drive(s)
> At least in my world, 2883's are unobtanium. I will check how many 7900's
> I
> have. If I have enough after refurbing them all, I can trade you a 7900A
> drive. A 13210 controller may be more difficult. There's a catch though -
> I'd rather not send a pristine 7900A that I spent a hundred hours
> refurbishing into a non-working environment. Let's get the other
> processors
> and peripherals working first. Once they fly, then we'll talk about a
> drive.
> By the way, you DO know you can use a 7905, or a 7906A,B,C,D don't you?
> The
> latter are common as dirt it seems.
>> will have to fire up the processors and see what happens there...
> You will need a diagnostic library. There's quite a few you'd need to
> pass,
> and at least two that should be run for an extended period. If you don't
> have a diag lib, contact me off-list and I'll get you one on any of
> several
> media. If it was me, I'd do some serious inspection if they haven't been
> powered up in years. At the very least pull all cards, progold the edge
> connectors and backplane sockets, check the power supply (there's a simple
> adjustment procedure). To check the power supply you need a single board
> in - I think it was the IDL board, have to check. To adjust the 20v memory
> supply you need the machine to warm up and the setting is based on a
> temperature chart. I'd also check the backplane wirewrapping for damage,
> bent pins, etc. The last thing you want to do is just hit the power switch
> and pray. You may loose a set of processor cards and those aren't easy to
> get.
>> if I was
>> to run this system I would want a good stash of 2100s on hand...
> You definitely don't need a "stash of 2100's" to run a system regularly.
> At
> least in my experience, the 2100's dont fail often, once you get one
> running
> well. Most common failure is an XY driver board or DC board. Get your two
> cpu's running well, then get one spare cpu set, and a couple spare memory
> boards. You should be set with that.
>> do you have any extra?
> Not yet, maybe in the future. But don't you already have two? Let's spend
> the time to get your existing ones working first.
> Jay
Received on Sat Sep 11 2004 - 23:02:01 BST

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