RetroBBS - alt.sys.pdp11 - Re: Need 11/93 repair

Need 11/93 repair

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Subject: Need 11/93 repair
From: gtdelaney@gmail.com (Jerry D)
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by: Jerry D - Thu, 17 Nov 2022 15:56 UTC

I have an 11/93 (M8981-AA KDJ11-EA) that has shown an error alarm 000002 under testing. I assume that this is a repairable fault but I have neither the knowledge nor expertise. Can anyone recommend a facility/person that is in the business/hobby of repairing vintage DEC cards and what I might expect to pay for said services??

Re: Need 11/93 repair

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From: jon@jschneider.tenreversed (Jon Schneider)
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Subject: Re: Need 11/93 repair
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by: Jon Schneider - Thu, 17 Nov 2022 16:56 UTC

On 17/11/2022 15:56, Jerry D wrote:
> I have an 11/93 (M8981-AA KDJ11-EA) that has shown an error alarm 000002 under testing. I assume that this is a repairable fault but I have neither the knowledge nor expertise. Can anyone recommend a facility/person that is in the business/hobby of repairing vintage DEC cards and what I might expect to pay for said services??

You should mention your location.

Jon

Re: Need 11/93 repair

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Subject: Re: Need 11/93 repair
From: gtdelaney@gmail.com (Jerry D)
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by: Jerry D - Thu, 17 Nov 2022 16:59 UTC

On Thursday, November 17, 2022 at 11:56:35 AM UTC-5, Jon Schneider wrote:
> On 17/11/2022 15:56, Jerry D wrote:
> > I have an 11/93 (M8981-AA KDJ11-EA) that has shown an error alarm 000002 under testing. I assume that this is a repairable fault but I have neither the knowledge nor expertise. Can anyone recommend a facility/person that is in the business/hobby of repairing vintage DEC cards and what I might expect to pay for said services??
> You should mention your location.
>
> Jon

Sorry, I'm in the US, Massachusetts to be specific.

Re: Need 11/93 repair

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Subject: Re: Need 11/93 repair
From: michaeljacoblesychyn@gmail.com (Michael Lesychyn)
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by: Michael Lesychyn - Mon, 28 Nov 2022 22:45 UTC

On Thursday, November 17, 2022 at 11:59:30 AM UTC-5, gtde...@gmail.com wrote:
> On Thursday, November 17, 2022 at 11:56:35 AM UTC-5, Jon Schneider wrote:
> > On 17/11/2022 15:56, Jerry D wrote:
> > > I have an 11/93 (M8981-AA KDJ11-EA) that has shown an error alarm 000002 under testing. I assume that this is a repairable fault but I have neither the knowledge nor expertise. Can anyone recommend a facility/person that is in the business/hobby of repairing vintage DEC cards and what I might expect to pay for said services??
> > You should mention your location.
> >
> > Jon
> Sorry, I'm in the US, Massachusetts to be specific.

You might want to be a little more explicit in terms of what specific error alarm and what testing? Is this an LED/Diagnostic/Specific Test error which is generated during the self-test at power-up of the board or is this another test of the system the board is integrated into? I would recommend taking a read through the DEC User Manual for the KDJ11-E on bit-savers (EK-KDJ1E-UG-001) if you have not already, Chapter 4 may have a clue to the issue you are experiencing if it is with the board.

Cheers,
Michael

Re: Need 11/93 repair

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From: bqt@softjar.se (Johnny Billquist)
Newsgroups: alt.sys.pdp11
Subject: Re: Need 11/93 repair
Date: Thu, 1 Dec 2022 17:14:53 +0100
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by: Johnny Billquist - Thu, 1 Dec 2022 16:14 UTC

On 2022-11-28 23:45, Michael Lesychyn wrote:
> On Thursday, November 17, 2022 at 11:59:30 AM UTC-5, gtde...@gmail.com wrote:
>> On Thursday, November 17, 2022 at 11:56:35 AM UTC-5, Jon Schneider wrote:
>>> On 17/11/2022 15:56, Jerry D wrote:
>>>> I have an 11/93 (M8981-AA KDJ11-EA) that has shown an error alarm 000002 under testing. I assume that this is a repairable fault but I have neither the knowledge nor expertise. Can anyone recommend a facility/person that is in the business/hobby of repairing vintage DEC cards and what I might expect to pay for said services??
>>> You should mention your location.
>>>
>>> Jon
>> Sorry, I'm in the US, Massachusetts to be specific.
>
> You might want to be a little more explicit in terms of what specific error alarm and what testing? Is this an LED/Diagnostic/Specific Test error which is generated during the self-test at power-up of the board or is this another test of the system the board is integrated into? I would recommend taking a read through the DEC User Manual for the KDJ11-E on bit-savers (EK-KDJ1E-UG-001) if you have not already, Chapter 4 may have a clue to the issue you are experiencing if it is with the board.

Fully agree. It's really hard to say anything based on this.

During a normal boot, the machine will be displaying a count down of
codes in the 7-segment display. But there, if you see a 2, it's not an
error, but that the booting is now trying to boot from code in the eeprom.
It could possibly stay there for ever.

You you run the built-in diagnostics, I don't think it can show an error
code of 2. And if it's when running some other tests, or software, it
would be really helpful to know what.

Also, a very silly thing to point out. There is a small lithium battery
on the CPU board. Have that ever been replaced? I don't think you'd get
an error if not, but just in case...

Johnny

fortune: cpu time/usefulness ratio too high -- core dumped.

computers / alt.sys.pdp11 / Re: Need 11/93 repair

computers / alt.sys.pdp11 / Re: Need 11/93 repair

Subject	Author
Need 11/93 repair	Jerry D
Re: Need 11/93 repair	Jon Schneider
Re: Need 11/93 repair	Jerry D
Re: Need 11/93 repair	Michael Lesychyn
Re: Need 11/93 repair	Johnny Billquist