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This was a DR 5033 it’s been running on a large layout with five other DR5033s and a DR5000 for 3 years. Any ideas as to the cause of its demise would be appreciated.
thanks
George

Looks like either a Powersupply that went bazooka's

Or there was a massive external powersource connected to the TrackOut ...

Correction:

?

Since the LM7805 also has a crater, it has been massive overvoltage from the powersupply.

?

This typically happens with the Digikeijs Adjustable Powerbricks.... known problem.

Thanks Karst
?George?

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- Bob

Bob, thanks for asking the question as I would like to know as well.?
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All electronics have failures.?

7805 Regulars are produced by the billions over the years.

Equipment is always sent back to the respective companies for repair, most are just tossed by the user and they buy another.

I have one of the variable output Power supply's on my YD7001 and 5033 and have confidence in both and they may or may not fail.

Have you checked the output voltage setting and measured the actual voltage on the power supply?

I have not seen any other posts here or elsewhere claiming there is any major issues with the P/S or 5033 or any other DR products.

Lets hope this is not an major issue.

I have been in electronics for over 65 years and this just seems to be a common failure problem.

Just my 2 cents worth.
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Dennis Cherry
Owner/Moderator

Thanks Dennis for your input?
George

Did Digikeijs change the power supply over the years? I don't see any variable voltage capabilities on the ones I have.
The DR5033 and DR5000 I bought all came with MeanWell GST60A15-P1J power supplies - a 15 volt fixed voltage unit intended for HO. An 18v version was also on sale presumable for O scale.
When I bought them the 15 volt versions were becoming scarce so I got some 18v versions and simply replaced the power supply with 15v units. Mean Well power supplies are generally well regarded and I've used them extensively over the years.
These are not variable power supplies and are available on eBay.
Does that help or confuse the issue??

When I started using the Digikeijs Products around 2017, the Power Supply's all had the voltage selector switch, then Digikeijs changed to fixed voltage power supply's and only had the 16 & 18 volt units available.? This to me does not mean the multi voltage units are a problem, but it might without proof.

I am working with a club that has about 10-12 Digikeijs power supply's on the layout with the voltage selector switches. I visited the club last October (2023) and we measured all the P/S units and all where working within tolerance using the 16 volt position. They have not had a failure since installing these pre-pandemdic.
?
Is see just a component failure of the 7805 regulator in the DR5033, but more testing is needed to confirm what happened.

?
Dennis Cherry
Owner/Moderator

On Wed, Apr 17, 2024 at 05:12 AM, Dennis Cherry wrote:

Is see just a component failure of the 7805 regulator in the DR5033

?

Well, I do see a bit more than "just" a blown 7805.

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Further, in Europe ( maybe because we have 230VAC on our outlets ?? ) an number of those old PSU's caused a) fire ? and b) sponteaneously changed voltage. I personally witnessed this at DK's production site in Almere, where the tester blew away 10 pcs DR5052 in succession, because of 5 (!!) brand new? ADJ PSU's delivering 26VDC instead of the set 19VDC ??

?

In the end, DK was forced to withdraw the ADJ PSU's from the market, due to damage-claims from customers...?

Apart from that those ADJ's are very, very noisy. I never used them, since from the moment Roy proudly presented them I found they are reall crap ... Thay are so noisy, that one piece in my workshop would case all (!!!) Powerline Network Adapters to stop working...

Then, unfortunately they started to sell GST60A15-P1J power supplies... again the wrong ones, since the PE (Protective Earth) from the mains-plug has a direct connection to the GND output terminal ???

In Europe, this is NOT allowed for use with modelrailroads. Since one can touch the bare PE in this way ( via the rails for instance ).?

?

All this was for us the reason to (let) produce our own PSU's to our own specs. A decent alternative to those are the GSM60A15-P1J ( = medical use ) PSU series.

?

Greets,

Karst

Karst, over looked the other internal component failure, with the 7805 failure that could cause other parts to fail.

The history of the P/S make sense and wonderfully explained by you.

Thank You
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Dennis Cherry
Owner/Moderator

That’s great info Karst - thank you.
i am currently running my dr5000 and 2 dr5033 s off of 1 meanwell LRS350 15V. which I realise after reading one of your previous posts is ill advised. ?I’ll get a couple of?GSM60A15-P1J ?to run each of the boosters leaving the LRS350 to power the dr5000

many thanks,
adam

Karst; ?thanks so much, likely saved me from a huge headache as I have seven DR5033’s on my layout in different blocks. I went ahead a bought the safer power supplies you mentioned.