General Forum

Re: Beomaster 1900, speaker hum

Dillen — Tue, 24 Nov 2009 13:31:51 GMT

Hi Rob,

One broken lamp will not be the reason for the humming.

If you can handle a standard electronic type soldering iron and can tell the positive
lead of a capacitor from the negative, you can do the recap.

Alternatively, your Beomaster is welcome here for repairs (I'm also in Denmark).

You have a PM regarding kits (check your inbox at the extreme top right corner of this page).

Martin

Re: Beomaster 1900, speaker hum

Limburger — Tue, 24 Nov 2009 12:24:32 GMT

Hi Martin,

Thanks!

I've checked the mains voltage setting and its on 220V, which should be correct. I left out that I currently have a broken panel lamp (on one of the FM channels), but I never expected this to be relevant in relation to the hum.

The capacitator kit with 60 components, how much does this cost? Furthermore, is this a task that can be performed by a novice like myself? Finally the lamp kit, how much would that be as I have one broken anyway?

Med venlig hilsen, Rob

Re: Beomaster 1900, speaker hum

Dillen — Tue, 24 Nov 2009 07:36:04 GMT

Hi Rob,

Welcome to Beoworld !

First check that the mains voltage setting (at the bottom of the Beomaster) is correct for your area.
Some Beomaster 1900's are prone to hum a bit if the supplied mains voltage is a bit on the low side.
If f.e. you live in a 230V area and the Beomaster is set for 240V - if it hums set it to 220V. It will not be damaged
by on overvoltage of 10V. Just remember to ALWAYS unplug from mains when setting the mains voltage.

Having said that; The humming, from your description, sounds like aging capacitors indeed.
A cap kit is available (from me) for convenience, it's huge kit with more than 60 components and I would recommend
you replace the lot.
There can be other reasons for a Beomaster 1900 (/2400) to hum, like a rectifier fault, bad voltage regulation or a
wrong power supply load, wrong wattage panel lamps etc. (a lamp kit is also available) but the hum pattern you
experience screams capacitors.

Martin

Beomaster 1900, speaker hum

Limburger — Mon, 23 Nov 2009 17:18:12 GMT

Hi everyone. A few months ago I received a Beomaster 1900 with Beovox C30 speakers from my girlfriends grandparents, that after many years of service was left to gathering dust in a studyroom. Everything seemed to be working well, however there was a slight humming sound in the speakers that unfortunately got significantly worse over the last months. Nowadays I experience a loud humming sound when I power up the Beomaster that I can reduce by leaving the unit powered on for a while with the volume on minimal, before setting the volume to normal and playing music. I'm not an expert in electronics but I read in this forum that a humming sound in this model is generally caused by leaking and/or dried-out electrolytic capacitors, especially in the power supply. Can anyone confirm if this is likely the case with my Beomaster 1900? Furthermore I read something about a repair kit; could this be an option for me?

Thanks very much in advance,

Rob