Re: HP 1000 E (2113B) Power Supply Fault

Colin Eby

Thanks for the input. I’ll crack on with that today and let you know.

Kind regards,

On 13 May 2020, at 22:00, Stephen Hanselman <> wrote:


After I wrote that I thought I’d better go read the CE Handbook again. I’d go with their troubleshooting and look for the status of the various LEDs that are in the power supply.

First though remove all of the I/O and Memory from their backplanes. Then try a power-up, this take a significant load off of the supply.

Passed that, it’s been a long time since I’ve had to work on a 1Kand I never did one in a depot setting. Our power supply guy had a group of load resistors to run the supplies with. I’d guess a 1/2A load on 5 volts might be enough.

Unless you have the jumper board you can’t just pull the memory backup boards out.


From: <> On Behalf Of Stephen Hanselman
Sent: Wednesday, May 13, 2020 1:48 PM
Subject: Re: [VintHPcom] HP 1000 E (2113B) Power Supply Fault


I can’t remember if the B/C supply will get ticked off with no load. BUT, if the manual suggests that then YES, you need to remove both the Molex connector and the cables from the PS to the Crossover PCA

This should completely unload the supply.

Before doing that you might want to measure the voltages at the crossover.

Having said that were I in the field still, I’d swap out the supply in an instant. On the other hand we used to have a saying “the weirder the problem the quicker you change the Proc PCA” mostly it worked well, good luck



Stephen Hanselman
Datagate Systems, LLC

From: <> On Behalf Of Rik Bos
Sent: Wednesday, May 13, 2020 1:41 PM
Subject: Re: [VintHPcom] HP 1000 E (2113B) Power Supply Fault

If you have the battery option, you should try the system with this option disabled you’ll need the short plug then.
It’s the square black plug on the back of the system.


Van: <> Namens Rik Bos
Verzonden: woensdag 13 mei 2020 22:28
Onderwerp: Re: [VintHPcom] HP 1000 E (2113B) Power Supply Fault

Hi Colin,

You will need the engineering reference
Exactly the last part
Be careful the capacitors in the switcher hold high voltage for a long time.
Parts to check are the high current schottky diodes of the 5V main supply and memory supply also LM339 /199 are the usual suspects.
First thing to do is to check all the voltage, you have to remove the top cover to access them, don’t let the supply run without a load.
The supplies are protected against overvoltage with crowbars. If you run them without a load chance is the crowbar will cut in and shortens the supply blowing your fuses.
If you use the diagrams form the ER manual it shouldn’t be a big problem to troubleshoot the supplies.


Van: <> Namens Colin Eby
Verzonden: woensdag 13 mei 2020 21:29
Onderwerp: [VintHPcom] HP 1000 E (2113B) Power Supply Fault

Hi --

We have a problem (another one). Could use some advice.

Just got really moving with the L series box, and thought I'd try to bring the 1000 E along at the same time. This machines was refurbed by a dealer. It was fully operational but without peripherals. I've hand key programs on it before. There were no known faults... until just now.

So I was going to try and step the loaders. The machine was running while i looking up the loader listing. When I look back everything had gone dark with the fans still whirring. The PSU fault light was flashing. Bugger.

So now I need a little before I turn a problem into a catastrophe (again).

The CE manual suggests if you remove the 'DC Output Connector' and try powering up again, you be able to eliminate an upstream short circuit. If the lamp is still flashing, that means the problem is in the supply itself. There are in fact two such connections -- the Output Voltage Connector Molex and then the terminal block with a loom running off to the backplane connectors. I assume I would need to disconnect both. Before I do that, can anyone confirm this is correct?

Kind regards,

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