HM2000 analogue controller (Hornby R8012)

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Buelligan
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HM2000 analogue controller (Hornby R8012)

Postby Buelligan » Mon Oct 07, 2019 7:33 pm

Hi all, yet another question from me, I'm not sure if this is best here, or in the Hornby section, I'll let the mods decide.

So, I recently took a chance on an untested HM2000 analogue controller. It arrived today, all looks good, but while it works (runs locos nice and smoothly in both directions, on both controls), it makes an odd buzzing noise. The noise stops if I press down on the top of the case in a certain area. Has anyone got any suggestions as to what could cause it? I can't open it up at the moment as its held together with security screws and I don't have the correct screwdriver for it, I'll have to try and buy one.

As always, thanks in advance for any help offered.

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Roger (RJ)
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Re: HM2000 analogue controller (Hornby R8012)

Postby Roger (RJ) » Mon Oct 07, 2019 7:43 pm

The buzzing from many electrical items is often due to the transformer vibrating due to the alternating mains voltage passing through it but there can be a few other reasons.

If you are not electrically competent it would probably be best not to open up the controller. Just get used to it buzzing.

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Re: HM2000 analogue controller (Hornby R8012)

Postby Bufferstop » Mon Oct 07, 2019 11:02 pm

It's usually because the transformer laminations are loose. Probably someone's dropped it, or they occasionally come like that. As Roger says get used to it. Whatever you do do not try to cure it by clamping the transformer, it risks creating a "short circuit turn" which is the basis of the electric arc welder.
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Re: HM2000 analogue controller (Hornby R8012)

Postby Flashbang » Tue Oct 08, 2019 10:27 am

Humming or Buzzing from a mains powered item will not normally cause any safety issues. As stated by others it is the mains transformer(s) metal laminations vibrating and causing the noise.
A typical example is if you walk past a local electricity sub station when all around is quiet, you will hear the Humming/Buzzing coming from the transformers.
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b308
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Re: HM2000 analogue controller (Hornby R8012)

Postby b308 » Tue Oct 08, 2019 12:39 pm

And now you know why the seller got rid!

Buelligan
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Re: HM2000 analogue controller (Hornby R8012)

Postby Buelligan » Tue Oct 08, 2019 3:38 pm

Thanks all, I'll try and get a video and maybe buzzing isn't the best description. I used to live in a flat opposite a pylon so there was a constant buzzing, got even worse in the wet!

I'm not bothered by the noise as long as it's not going to be a hazard. Only paid £15 for it, trying to get bits together for my son, on a very tight budget. Would've got the a Gaugemaster twin control if money was no object, but at over £100 it was too much.

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End2end
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Re: HM2000 analogue controller (Hornby R8012)

Postby End2end » Tue Oct 08, 2019 4:10 pm

Flashbang wrote:A typical example is if you walk past a local electricity sub station when all around is quiet, you will hear the Humming/Buzzing coming from the transformers.

I've always found this a very ominous sound. :? :lol:
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RAF96
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Re: HM2000 analogue controller (Hornby R8012)

Postby RAF96 » Wed Oct 09, 2019 1:33 pm

In the absence of a triangular bit you can use a hex key but be aware the screw heads are soft and strip easily if you don’t use a tight key.

If you want to see how to dismantle the unit have a look here http://www.halton96th.org.uk/page15.html .....taking heed of the lethal Mains Voltage warnings.
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Flashbang
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Re: HM2000 analogue controller (Hornby R8012)

Postby Flashbang » Wed Oct 09, 2019 2:25 pm

I would suggest that you DO NOT open the controller. It contains no user serviceable items and you cannot/must not tighten the transformers lamination's. Plus lethal mains voltage exist inside when its plugged in!

You really have two options IMO...
Live with the humming - it can't be that bad really!
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Buelligan
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Re: HM2000 analogue controller (Hornby R8012)

Postby Buelligan » Wed Oct 09, 2019 5:56 pm

Hornby service centre is a good call, hadn't given that a thought. I'll send an email off to them and see if they think they'll be able to help. My hearing is ridiculously sensitive, and any sort of buzzing will drive me mad, even worse if I know it's not supposed to be there!

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Re: HM2000 analogue controller (Hornby R8012)

Postby b308 » Wed Oct 09, 2019 7:06 pm

Flashbang wrote:You really have two options IMO...
Live with the humming - it can't be that bad really!.


Three actually, sell it on and get another that works properly.

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RAF96
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Re: HM2000 analogue controller (Hornby R8012)

Postby RAF96 » Thu Oct 10, 2019 8:43 am

Buelligan wrote:Hornby service centre is a good call, hadn't given that a thought. I'll send an email off to them and see if they think they'll be able to help. My hearing is ridiculously sensitive, and any sort of buzzing will drive me mad, even worse if I know it's not supposed to be there!


You may be better giving them a call as folk on the Hornby site report tardy response to emails but instant response on the phone.
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