[Vinlyfrontier57]

My first post on Beoworld forum.  I’ve been restoring a BeoGram 6000 turntable, and have regained the audio output by replacing both transistors in the series regulator on the RIAA pre-amp circuit board.  So it now plays.

But my next problem is mechanical: the 3 spring steel plates that are supposed to hold the platter in suspension (away from the chassis) must have lost some of their spring.  I thought I had fixed the problem by raising the screws that hold the plates in place, but then then they are too high to allow the brushed aluminium covers to be replaced.

Has anyone come across this problem, and know a fix?  Can the plates be re-bent to restore their spring, or does this risk breaking them?

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[Mark-sf]

First, confirm all of your springs curl up when the sub-chassis is unhooked. Then you use the rear nut to bring the sub-chassis high enough to float between the lower and bottom stops. Then tweak the three nuts to ensure the platter is level but not necessarily even with the top plate. If you then need additional height, you can loosen the locknut on the center bearing and raise that as it is threaded. You will then need to make sure your arm cued-up position will still clear the record.

As to centering, there is some side play in each leaf spring and you can also get some side or front/back play by slightly bending the rear height screw. I have never seen the need for more than 1-2mm of adjustment. If you do then look at your top plate alignment as that is likely out.

[Vinlyfrontier57]

Thanks for your helpful reply Mark-sf.

Yes, the plastic inserts in the transport screw mechanisms had broken into lots of pieces and fallen into the bottom of the chassis.  I’ve picked them all out as far as I can see, and they don’t seem to be interfering with the suspension.  But a complete strip-down is beckoning.

I still can’t figure out why the leaf springs don’t seem strong enough to hold the sub-chassis in suspension.  They’re struggling to bring the platter surface level with the surface of the cover plates…  Also the platter isn’t quite central in the opening in the main cover; the service manual suggests that the leaf springs can be moved side-to side to adjust this, but on my model no adjustment is possible.

Maybe a strip-down will reveal all! (The label inside my unit says it’s a model 5502.)

[Mark-sf]

I have never seen the leaf springs fail. I have seen the plastic inserts break down and leave pieces interfering with the suspension. I would carefully examine the transport screw mechanism for these. When I do a referb of either 400x 0r 6000 I remove the entire sub chassis to clean out the pieces left behind. If you do remove the transport screw assembly be careful of the multiple washers and there orientation and ordering.

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