Hello;

After years buying only new B&O gear, I decided to explore the older product lines. As a starter , I put together a nice vintage set up comprised by a Beogram 4004, Beomaster 3000-2 an a pair of Beovox S-55.

The lodspeakers soud really OK, the Beogram will benefit from a new band (a set from Martin is on its way) and a cartridge (probably follow the Sondsmith path) but it's the Beomaster the one that concerns me.

After listening to the radio for two hours, I started to notice a strange noise on the left channel. Something like a false connection or dirty switch. It's very annoying. I thought initially it was a problem on the loadspeaker, I swap them out and the problem moved to the other one. I tried on the speaker 2 connection on the back but it is the same.

Right now the problem starts as soon as I turn the Beomaster on. The noise remains for a minute or so after turning the BM3000-2 off.

Any suggestion as to what could be the cause? Could it be a false contact on the circuit board? A dirty switch? Other thoughts?

Thanks;

Gustavo this is actually a common problem on the 3000-2's.  The problem is often as you said a faulty contact inside the switch.  Disassembling the switches can be complicated, but others have had success by removing the front panel and spraying electrical contact cleaner in the backs of the switches while tilting the panel away so the fluid and residue runs out the front of the switches.  Then you should be able to clean up the residue and reassemble it.  Others may chime in with some better suggestions.

Austin 

Thanks Austin;

I imagine I only need to undo the screws at the bottom of the front and should be ready to try that out, or is there anything else to do to remove it?

Sorry Gustavo, I can't remember, but the service manual is on the site.  If you search the forum you should be able to easily find some of the members who did it and ask them.

Austin

http://forum.beoworld.org/forums/thread/94026.aspx

 http://forum.beoworld.org/forums/thread/116793.aspx

Does the noise increase with the volume control ?
Is the noise present on all FM presets ?

PM me if this is the Beomaster, you bought from me.

Martin

This problem often comes from the "TEST" button at the rear of the Beomaster.
Make it slide (up and down) several times after a good spraying of an electrical contact cleaner.

 Marc

Dillen:

Does the noise increase with the volume control ?
Is the noise present on all FM presets ?

PM me if this is the Beomaster, you bought from me.

Martin

You've got a PM Martin.

Regards;

I'm trying this tomorrow. I was away for a week and couldn't see your comments.

Thanks;