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I have a Beogram RX2, the platter scrapes when i play a record. I presume there is some way of changing the suspension height?
There are three leaf springs under the platter with a simple screw adjustment. Just pick the platter off to get at the leaf springs.
I would hazard a guess, though, that the height of the platter is not your problem. Look under the platter and check the suspension locks (three screws) and transport locks (three plastic assemblies that rotate ninety degrees to lock the subplatter).
With the 3 leaf springs you will have to adjust highs and center, if after that, its still scraping, check where and we may have further help. Pics are welcome
Collecting Vintage B&O is not a hobby, its a lifestyle.
Even if the suspension is bottomed out, it shouldn't be scraping. I'm betting one or more transport locks are still partially engaged.
So the front of the platter has lots of travel before it bottoms out, the rear of the platter has hardly any travel before it bottoms out.
As I suspected, the locks are still partially engaged. They need to be rotated with a screwdriver.
See Figure #1 on the subplatter? Those aren't rotated enough.
I tried to turn the plastic locks but they started making noises like they were going to crack.
Yeah, they'll squeak, and yeah, at this age they may start to break. Get yourself a one of those very short (no shaft) screwdrivers with a largish head. You have to move those further out of the way.
One of these.
And it will take more force than you think it will to move those locks. Sometimes it helps to get them started in the direction of locking, then move them to the unlocked position. Believe me. I've locked and unlocked RX 2's dozens of times for more than 20 years now.
Clockwise to lock/anti-clockwise to unlock?
I think that's backwards. I'm at work right now, but I can check in about 2 hours at home it you'd like.
Locked will have the groove in the lock (where you put the screwdriver) perpendicular to the tangent of the subplatter. Unlocked has the groove of the lock parallel to the platter.
Clock wise to unlock, see the arrow fig. 1, press down the platter a little when unlocking
Ok, all the way clockwise locks and all the way anti-clockwise locks them. Should they be in the middle position?
Now even I get confused, look down on the locks, you should be able to see if the platter is free, the platter has to move free up and down at all 3 points
Vox_T: Ok, all the way clockwise locks and all the way anti-clockwise locks them. Should they be in the middle position?
Yes, groove parallel to subplatter, just like the picture on the subplatter.
Tried that, still bottoming out at the rear of the platter.
Vox_T: Tried that, still bottoming out at the rear of the platter.
Well, that back leaf spring does look a little low. Can you post a new picture centered above the subplatter that shows all 3 leaf springs? I'll compare that to my two working RX2s at home after I leave work (in about an hour and a half at this point, 6 pm eastern time).
The front leaf spring is definitely higher than the rear one.
Vox_T: The front leaf spring is definitely higher than the rear one.
I think that may just be an illusion, or it may be by design. My front spring appears higher than the back one as well. There is a third to the right under the tonearm and top plate.
Here's a shot of the better of my two RX2s.
And here's a shot of the back leaf spring. Not sure how helpful this photo is.
When I place the platter on the sub platter it is clearly higher in the front than in the back. I need to get the back end up a bit.
Vox_T: When I place the platter on the sub platter it is clearly higher in the front than in the back. I need to get the back end up a bit.
I've never done it before. The service manual says the following:
Adjust the turntable height until the underside of the platter is approximately 0.5 mm above or is flush with the topside of the foam chassis all the way round.
Make the adjustment by bending the three brackets which support the suspension leaf springs. Make the bends with a screwdriver inserted in the holes A.
The "foam chassis" is the top plate of the turntable. "Hole A" is 2 mm x 3 mm hole next to the two screws.
Good luck.
Ok, you bend the bracket down to make the leaf spring come up. I went too far at first and had the opposite problem at the other end but after some tweaking i now have the platter level and not scraping. :D
Underside of the platter shall be at level with, or 0.5 Mm over the foam chassis, thats just what it is, the foan chassis, not the cover sitting on the chassis.
If the underside of the platter is over or level with the cover, the record played will ride some 5 Mm over the cover.
Vox_T: Ok, you bend the bracket down to make the leaf spring come up. I went too far at first and had the opposite problem at the other end but after some tweaking i now have the platter level and not scraping. :D
So problem solved? Outstanding!
Søren Mexico: Underside of the platter shall be at level with, or 0.5 Mm over the foam chassis, thats just what it is, the foan chassis, not the cover sitting on the chassis. If the underside of the platter is over or level with the cover, the record played will ride some 5 Mm over the cover.
Shouldn't you be working on your BM4400?
Rich:Shouldn't you be working on your BM4400?
I love you too Rich
Here the adjustment, done without the top cover
Should look like this when you finish
Here my pics from my BG 5000, more or less the same as the RX