Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Awesome! Congratulations! Marc > From: Dominique Carlier <d...@skynet.be> > Date: Tuesday, August 29, 2017 > Subject: Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and > restarting > YES! The monster booting again! :-)

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On Tue, Aug 29, 2017 at 10:44 PM, Dominique Carlier via cctalk wrote: > YES! The monster booting again! :-) Congratulations! Well done! Thanks for sharing the story and the pictures. -- Regards, Torfinn Ingolfsen

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

YES! The monster booting again! :-) Thus after checking the condition of the capacitors and the rectifying diodes by interchanging the 5v sources under the advice of Curious Marc, a finally swapped Q12 and Q13, find the dead one, replace Q13. Following the advice of Christian I raised both

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On Sat, 26 Aug 2017, Dominique Carlier wrote: I have temporarily replaced the 2N6471 by an approaching equivalent, I makes the settings to get very exactly + 5V on both outputs and the machine restarted, finally! YES !! :-) [...] then 02, 03 !! 04 !!! 05 !! And then ... nothing, and since

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Dominique, I just want to say how impressed I am with your work here, as well as the way you're documenting it. This is fantastic stuff! There's a lot of emails on this thread for me to catch up on from the past month. But if I have one request, it's that you post any additional pics you might

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

behalf of "cctalk@classiccmp.org" <cctalk@classiccmp.org> Reply-To: Dominique Carlier <d...@skynet.be>, "cctalk@classiccmp.org" <cctalk@classiccmp.org> Date: Wednesday, August 23, 2017 at 6:17 AM To: "cctalk@classiccmp.org" <cctalk@classi

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

talk@classiccmp.org> *Reply-To: *Dominique Carlier <d...@skynet.be>, "cctalk@classiccmp.org" <cctalk@classiccmp.org> *Date: *Wednesday, August 23, 2017 at 6:17 AM *To: *"cctalk@classiccmp.org" <cctalk@classiccmp.org> *Subject: *Re: DCC-116 E / DATA GENERA

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

talk@classiccmp.org> *Reply-To: *Dominique Carlier <d...@skynet.be>, "cctalk@classiccmp.org" <cctalk@classiccmp.org> *Date: *Wednesday, August 23, 2017 at 6:17 AM *To: *"cctalk@classiccmp.org" <cctalk@classiccmp.org> *Subject: *Re: DCC-116 E / DATA GENERA

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Hi all, Thank you Marc, I will follow your advice. Doubts must be removed. I would be glad to know that the big (and expensive) capacitors are OK. In the meantime I have new information. Following the remarks of Brent Hilpert I sought to have more information on the backplane of my D116-E.

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

alk@classiccmp.org> Subject: Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting Here is the situation. The + 5V 12A that collapses comes out from pins 10-14 / 36-40, the other + 5V 12A (pins 15-22 / 36-40) never goes down. All that I surrounded in gr

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

arts to degrade, and if it exceeds the design >> criterion for the power supply. >> Marc >> >> From: cctalk <cctalk-boun...@classiccmp.org> on behalf of >> "cctalk@classiccmp.org" <cctalk@classiccmp.org> >> Reply-To: Dominique Carlier <d...@skyne

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

I put the answers in your message 23/08/2017 20:22, Brent Hilpert via cctalk wrote: Am I correct in inferring that this machine (the processor) has four +5V regulators?: it appears there are 2 power supply chassis (rear photo), each with 2 regulators, or are those 2 chassis not identical

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 2017-Aug-23, at 6:17 AM, Dominique Carlier via cctalk wrote: > Here is the situation. > > The + 5V 12A that collapses comes out from pins 10-14 / 36-40, the other + 5V > 12A (pins 15-22 / 36-40) never goes down. > > All that I surrounded in green on that image (1950×2361, zoomable) are the

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Here is the situation. The + 5V 12A that collapses comes out from pins 10-14 / 36-40, the other + 5V 12A (pins 15-22 / 36-40) never goes down. All that I surrounded in green on that image (1950×2361, zoomable) are the components that I tested on the power supply G2, A3 motherboard,

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 2017-Aug-21, at 8:46 AM, Dominique Carlier via cctalk wrote: >> As is typical for power supplies of this type and era, this power supply >> includes current limiting circuitry. >> >> The current-limiting circuitry will throttle down the output voltage (not >> shut it off completely) as the

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Because I had removed every wires to test transistors on A1 and A2, and since I have to buy 4 new 0.1ohm resistors and an equivalent of 2N6254, in the meantime because they are identical I decided to interchange A1 and A2, I was hoping note a +5V collapsed on the other output but no, it is

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Hello, Yes, it is a "Fluke 73" maybe not enough accurate for that kind of measurements ? On 21/08/2017 18:53, Anders Nelson via cctalk wrote: Hi Dominique, Are you using a standard DMM to make your resistance measurements? If not, you may have more consistent results by using a laboratory

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Hi Dominique, Are you using a standard DMM to make your resistance measurements? If not, you may have more consistent results by using a laboratory DMM that is rated to measure milliohms. On Mon, Aug 21, 2017 at 11:47 AM Dominique Carlier via cctalk < cctalk@classiccmp.org> wrote: > > Thank you

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Thank you very much for these valuable detailed information! :-) Also following the suggestions of Curious Marc, I focus now on the comparison between the two almost identical circuits that deliver the regulated + 5V on G2. Following your explanations, I started by checking the transistors

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 2017-Aug-20, at 12:08 AM, Brent Hilpert via cctalk wrote: > On 2017-Aug, at 12:10 PM, Dominique Carlier via cctalk wrote: >>> >>> Question: a faulty voltage regulator can behave in this way? I always >>> thought it worked or it did not work, but not between the two states >>> depending on

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 2017-Aug-19, at 12:10 PM, Dominique Carlier via cctalk wrote: > Maybe it's better to give us all the useful information these power supplies, > moreover it might be useful to other people with the same computer. > > An overall bloc diagram of the D-116 power supply including G1 and G2. >

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 08/19/2017 11:29 AM, Rod Smallwood via cctalk wrote: > Leaky Crowbar SCR? > Never heard of such a thing. SCRs are usually all the way on, or all the way off. Why would it be sensitive to load on the power supply? Jon

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

A straightforward linear supply. We should be able to get that puppy working. Looks like you have two of the same thing on G2, two +5V supplies. You could take advantage of that and compare voltages of one against the other at several points. You coukd also monitor the voltage on the non

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Maybe it's better to give us all the useful information these power supplies, moreover it might be useful to other people with the same computer. An overall bloc diagram of the D-116 power supply including G1 and G2. http://www.zeltrax.com/classiccmp_forum/psu_overall_bloc_diagram.jpg The

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Leaky Crowbar SCR? On 19/08/2017 17:06, Jon Elson via cctalk wrote: On 08/19/2017 03:17 AM, Dominique Carlier via cctalk wrote: Hello Marc, In fact no, i am not really sure, I checked twice all the big filtering caps but as you with a low voltage tester. These caps comes apparently from a

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 08/19/2017 03:17 AM, Dominique Carlier via cctalk wrote: > Hello Marc, > > In fact no, i am not really sure, I checked twice all the > big filtering caps but as you with a low voltage tester. > These caps comes apparently from a new old stock and some > doubts persists now. > I admit, I don't

RE: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Of Dominique Carlier via cctalk Sent: Saturday, 19 August 2017 6:17 PM To: Curious Marc <curiousma...@gmail.com>; General Discussion: On-Topic and Off-Topic Posts <cctalk@classiccmp.org> Subject: Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting Hello Ma

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

power supply for that regulated +5V, and bypass the +5V regulated of G2, but it would be a shame and not in the spirit of a restoration in my opinion. Forwarded Message Subject: Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting Date:W

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

spirit of a restoration in my opinion. Forwarded Message Subject: Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting Date:Wed, 16 Aug 2017 23:33:31 +0200 From:Dominique Carlier <d...@skynet.be> To:Christian Kennedy via cctalk <cctalk@classi

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Dominique, I agree with Rod’s suggestion to check the current, but one other possibility is to check for small resistances, maybe considerably less than 1 Ohm, somewhere between the 5V regulation and the delivery of 5V to the logic boards. If a connector has corroded or a solder joint

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

. Forwarded Message Subject: Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting Date: Wed, 16 Aug 2017 23:33:31 +0200 From: Dominique Carlier <d...@skynet.be> To: Christian Kennedy via cctalk <cctalk@classiccmp.org> Hi

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

NOVA 2/10 / Nixdorf 620 - Restoring and restarting Date: Wed, 16 Aug 2017 23:33:31 +0200 From: Dominique Carlier <d...@skynet.be> To: Christian Kennedy via cctalk <cctalk@classiccmp.org> Hi ! I finally find some time to work again on my D-116, try to find the problem(s), thus

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Hi ! I finally find some time to work again on my D-116, try to find the problem(s), thus principally at the level of PSUs. As you suggested, I inspected particularly the large capacitors of both power supplies. I replaced those that appeared suspicious according to the results via my ESR

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Hi all, Sorry for this long wait. Because of some family problems combined with a big professional project I had to put this project on hold. However I intend to continue this restoration with detailed photos and all the continuation of the adventure with a lot of informations ;-) Since my

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Hi, I saw this ad but the shipping costs until Belgium decided me to react as if I had not seen anything ^^ It's a pity, I would have taken a few boards. On 18/05/2017 06:05, AJ Palmgren wrote: My search for this was prompted by my seeing one on eBay: http://www.ebay.com/itm/282462822861

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 4/1/2017 6:47 PM, Jay Jaeger via cctech wrote: Typically not, since with no tape it should act like all the holes are punched, yes? with no tape, the Data Products servo ran open loop. You'd think what you said was true, but IIRC, you didn't run them with no tape. Later the 2230/60/90s

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

My search for this was prompted by my seeing one on eBay: http://www.ebay.com/itm/282462822861 Did anyone here purchase it, or know who did? Just curious, since these seem so rare and interesting. Best, -AJ On Wed, May 17, 2017 at 8:29 PM, AJ Palmgren wrote: >

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Dominique, I'm quite interested in seeing your Entrex/Nixdorf system restored. Please keep us updated here. Nice work saving these rare items! I've done some of my own work restoring a DG Nova-type system. ( http://Point4iris.com ). I'd love to see if there's any way I could help. I'll read

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

> On 4/4/2017 7:09 AM, Dominique Carlier via cctalk wrote: >> Concerning the memory, I analyzed more in detail, I think finally that >> all the memory is core type, 1 X 16KW (it is marked on it) and 2 X 8KW >> (according to the size of the core package in comparison with the 16KW >> board).

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 4/4/2017 7:09 AM, Dominique Carlier via cctalk wrote: Concerning the PSU I will analyze your suggestions. Concerning the memory, I analyzed more in detail, I think finally that all the memory is core type, 1 X 16KW (it is marked on it) and 2 X 8KW (according to the size of the core

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Many thanks for these detailed answers ! :) Indeed, I finally do not know exactly what Nova my DCC is the clone. Another specialist suggested that it was rather a clone of NOVA 1200? Note that in Nixdorf contracts for the 600 series, these machines were sometimes updated with a new CPU over

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

After the mess, ... http://actingmachines.com/classiccmp_forum/mess01.jpg ... it was time to reorganize a cool place to continue this restoration :-) http://actingmachines.com/classiccmp_forum/calm01.jpg http://actingmachines.com/classiccmp_forum/calm02.jpg Without the schematics of the two

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Typically not, since with no tape it should act like all the holes are punched, yes? Sent from my iPad > On Apr 1, 2017, at 18:04, Chuck Guzis via cctech > wrote: > >> On 04/01/2017 01:45 PM, Al Kossow via cctalk wrote: >> >> >>> On 4/1/17 12:33 PM, Dominique Carlier

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

I do not have anything useful to say, but I liked your pictures and video. Congratulations on a successful first boot! -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 04/01/2017 01:45 PM, Al Kossow via cctalk wrote: > > > On 4/1/17 12:33 PM, Dominique Carlier via cctalk wrote: >> strange machine, there is a tape reader inside the printer. > > it is used to program vertical forms postioning. the format tape is > in a loop ...and whatever you do, don't

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

On 4/1/17 12:33 PM, Dominique Carlier via cctalk wrote: > strange machine, there is a tape reader inside the printer. it is used to program vertical forms postioning. the format tape is in a loop

DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

Hi guys ! My name is Dominique, 43 , from Belgium (I apologize in advance for my approximate English). I join this forum under the recommendations of Curious Marc. It seems there are people here who can help me to get back to life the venerable machine that I have just recovered. Some