It's a construction flaw, causing the electronics to accept twice the frequency of the motor circuit than normal. If the turntable belt is slipping, the motor will accellerate too fast and the electronics haven't got time to correct and happily accepts the double speed.

It happens in Beogram 2200,2202,2400,2402 too and I seem to remember that B&O introduced a fix at some point. I will see if I can find it. In the meantime you could check if the turntable belt slips easily on the motor pulley. If you rotate the subplatter by hand, the motor pulley should follow closely and not just skid along on the belt surface.

Martin

Lift off the platter.

Losen the (5 or so) screws that hold the plastic frame and remove it.

Then lose, I think, 4 screws holding the turntable chassis.

Martin

Dillen:

Lift off the platter.

Sometimes easy things are so hard....!

I thought I tried to lift off the platter but seems that I didn't! The whole turntable assembly is so springy that I though it would break if I put too much force into it.... Well, thanks, this will ease the repair a lot. I will get into this repair again next week as the deck is not currently at my home.

My friend is selling vintage audio things and he gave this BC to me for repair and as the turntable worked otherwise fine, except for one or two superfast-run I moved it back to him just few days ago. Today he said that he won't put it for sale until this problem is fixed - now I can tell him that it's not (completely) my fault of repair! I will get back to you, Martin, as I will most likely need new belts for this thing... :)

Meanwhile I have a nice Beocenter 9000 waiting for a new mute relay.... that's a real beauty!

Yes, I have a few left.

Martin