BeoGram

Re: Beogram 3400 spins too slowly

msissons — Thu, 01 May 2008 10:57:39 GMT

Thank you - I'll give it a go and report back on how I get on

Matt

Re: Beogram 3400 spins too slowly

Dillen — Wed, 30 Apr 2008 11:16:50 GMT

Welcome to Beoworld !

Your Beogram is in need of cleaning and lubrication of the motor bearings. It seems to spin freely - just not freely enough. It's a one-phase AC motor so it has almost no initial torque. The bearings are porous bronze, the old oil has hardened inside the pores and will need to be cleaned out and fresh oil pressed in. Vacuum and sometimes heat is best for this.

Martin

Beogram 3400 spins too slowly

msissons — Wed, 30 Apr 2008 10:05:50 GMT

I've bought my first Beogram! It's a 3400 (the earlier type 5703) without the CD4 circuit installed. Everything seems to work fine except that the table runs slow (at a guess it's about 25rpm). I've replaced the belt, tried adjusting the eddy brake (even taking out the magnets), and cleaning the switch contacts, but none of these has worked.

The speed doesn't appear to change when the 45 switch is pressed either, it stays at the same sub-33rpm speed. I don't know if this could be related.

I've taken it all apart and everything seems to be in order - no broken parts, all the switching levers intact and correctly places. Everything spins freely as well, so basically I'm stumped! It's such a simple turntable electronically. The only parts I can think may need replacing are the 10 ohms resistor and 10nF capacitor, but looking at the circuit diagram I can't see why that would make any difference.

If anyone can shed some light on this, I'd really appreciate it!