HI IVE JUST ACQUIRED A BEOCENTER 7700 THE TAPE DECK IS NOT WORKING BUT I CAN HEAR A MOTOR ,THE TRACKER ARM WILL NOT GO TO 45s JUST 33s IS THIS A COMMON PROBLEM AND IS IT FIXABLE   

Record size is determined by record weight, not the chosen speed. Try with a 7inch and a 12inch record respectively.
Sounds like your Beocenter tape deck needs new belts, I can supply the belts, PM me for details.

Martin

Thanks very much for the help ,what is the cost of the belts and are they easy to fit cheers ,sorry iam not to sure what you mean by the weight of record ive tried what you said it still will not move to the 45

A 12 inch record is much heavier than a 7 inch. That's how the deck senses
what size record is on the platter.
Are the transport safety screws undone ?

The tapedeck belts are available as a set.
It's not one of the easiest decks to replace belts in but by far
the worst either. Mounting instructions with photos and text (english)
can be included if you need.

You have a PM, check your inbox.

Martin

I seem to have a related problem with my Beocenter 7700. Even with a record on the platter the unit flashes uu:uu. Would this be caused by a calibration problem in the weight sensor?  Any other ideas as to the cause? I have downloaded the service manual so will try the procedure there for adjusting the weight but would really appreciate a few instructions if anyone is familiar with doing this.

Thanks

Dylan