Beogram 1000V type 5203 repair - UK Vintage Radio Repair and Restoration Discussion Forum

Chris308 · 6th Dec 2018, 2:57 pm

Hi

I have acquired a Beogram 1000V type 5203 which has an issue. The platter seems to be rubbing against the main metalwork when the platter rotates.i have removed the platter from the unit. Dores anyone know if there should be some sort of bearing or a shin between the platter and the base?
I attach two pics.

Thanks

Chris

Studio263 · 6th Dec 2018, 3:07 pm

Oh dear, by the look of it you've ruined that.

Apart from the very early ones (42V, 42VF etc), the platter is riveted to the hub which is part of the spindle. To remove it (in most cases) you drive out a tiny roll pin from inside a plastic gear (which doesn't do anything) and pull out the whole thing as one unit. These parts are all under the top plate. Some have a larger (gold coloured) bearing housing with a screw which you loosen to release the spindle, but I've only seen a few like that. that looks like someone has wrenched the platter off without doing any of those things, not a good start.

The first thing to do is to get the spindle out and re-attach it (and the hub) to the platter. It has to run true, so if anything is bent you won't be able to do it without access to a decent lathe. Drill the rivets out and tap the holes oversize (M4?). You may need countersunk screws to clear the plastic strobe disc and 45 centre located above.

The end of the spindle is a needle point bearing (very sharp, be careful), if this is damaged the deck is scrap. If not, and even after you've re-attached the hub to the platter properly it still scrapes then you'll need to shim up the bearing a little. Again buying another one may be easier at this point, its the motors and the expensive styli that kill these, not the platters and bearings as a rule.

Extra notes: Looking at the pictures again (with a certain degree of despair...) it seems as if the hub casting has been pulled off the centre spindle somehow. This shouldn't be possible, so its either cracked or broken in some other way. It should be a dead tight fit, I've never seen one come off. If the tolerances are still there you may be able to loctite it back on at the correct height (but I doubt it). It may be necessary to bore out the centre of the hub and make a short sleeve to make it a tight and true fit again - that's what I'd do.

Chris308 · 6th Dec 2018, 4:01 pm

thanks for the reply.

That doesn’t sound good. The unit was catching when I got it. So I guess the platter had slipped down the spindle.

The platter is still a good fit on the spindle and I cannot see any cracks in the casting.

How do I know how high it should be on the spindle? There are what appears to be two small grooves on the spindle.

Chris

Studio263 · 6th Dec 2018, 5:15 pm

The clearance between the bottom of the platter and the top of the deck should be about 3mm. I'd take the deck out of the plinth, put the belt back on and set the height so that the belt run is straight (remember to do the right way up as the motor is mounted on springs). Then measure how much of the spindle is sticking up and the top and loctite the platter to the shaft in that position.

Chris308 · 6th Dec 2018, 5:52 pm

Thanks I will give it a go.
Chris

6th Dec 2018, 2:57 pm	#1
Chris308 Tetrode Join Date: Jun 2016 Location: Ipswich, Suffolk, UK. Posts: 67	Beogram 1000V type 5203 repair Hi I have acquired a Beogram 1000V type 5203 which has an issue. The platter seems to be rubbing against the main metalwork when the platter rotates.i have removed the platter from the unit. Dores anyone know if there should be some sort of bearing or a shin between the platter and the base? I attach two pics. Thanks Chris Attached Thumbnails

6th Dec 2018, 3:07 pm	#2
Studio263 Octode Join Date: Apr 2007 Location: Hampshire, UK. Posts: 1,577	Re: Beogram 1000V type 5203 repair Oh dear, by the look of it you've ruined that. Apart from the very early ones (42V, 42VF etc), the platter is riveted to the hub which is part of the spindle. To remove it (in most cases) you drive out a tiny roll pin from inside a plastic gear (which doesn't do anything) and pull out the whole thing as one unit. These parts are all under the top plate. Some have a larger (gold coloured) bearing housing with a screw which you loosen to release the spindle, but I've only seen a few like that. that looks like someone has wrenched the platter off without doing any of those things, not a good start. The first thing to do is to get the spindle out and re-attach it (and the hub) to the platter. It has to run true, so if anything is bent you won't be able to do it without access to a decent lathe. Drill the rivets out and tap the holes oversize (M4?). You may need countersunk screws to clear the plastic strobe disc and 45 centre located above. The end of the spindle is a needle point bearing (very sharp, be careful), if this is damaged the deck is scrap. If not, and even after you've re-attached the hub to the platter properly it still scrapes then you'll need to shim up the bearing a little. Again buying another one may be easier at this point, its the motors and the expensive styli that kill these, not the platters and bearings as a rule. Extra notes: Looking at the pictures again (with a certain degree of despair...) it seems as if the hub casting has been pulled off the centre spindle somehow. This shouldn't be possible, so its either cracked or broken in some other way. It should be a dead tight fit, I've never seen one come off. If the tolerances are still there you may be able to loctite it back on at the correct height (but I doubt it). It may be necessary to bore out the centre of the hub and make a short sleeve to make it a tight and true fit again - that's what I'd do. Last edited by Studio263; 6th Dec 2018 at 3:15 pm.

6th Dec 2018, 4:01 pm	#3
Chris308 Tetrode Join Date: Jun 2016 Location: Ipswich, Suffolk, UK. Posts: 67	Re: Beogram 1000V type 5203 repair thanks for the reply. That doesn’t sound good. The unit was catching when I got it. So I guess the platter had slipped down the spindle. The platter is still a good fit on the spindle and I cannot see any cracks in the casting. How do I know how high it should be on the spindle? There are what appears to be two small grooves on the spindle. Chris

6th Dec 2018, 5:15 pm	#4
Studio263 Octode Join Date: Apr 2007 Location: Hampshire, UK. Posts: 1,577	Re: Beogram 1000V type 5203 repair The clearance between the bottom of the platter and the top of the deck should be about 3mm. I'd take the deck out of the plinth, put the belt back on and set the height so that the belt run is straight (remember to do the right way up as the motor is mounted on springs). Then measure how much of the spindle is sticking up and the top and loctite the platter to the shaft in that position.

6th Dec 2018, 5:52 pm	#5
Chris308 Tetrode Join Date: Jun 2016 Location: Ipswich, Suffolk, UK. Posts: 67	Re: Beogram 1000V type 5203 repair Thanks I will give it a go. Chris