Beogram 3400 intermittent tonearm movement

5 replies
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paxto (archived2)
Bronze
Posted May 25, 2019 at 16:40 GMT
#2209998

I am working on a Beogram 3400 turntable.  I have lubricated the tonearm lift piston, and have cleaned the cogwheels and other mechanisms. It all works perfectly----for a while---then unexpectedly (and seemingly randomly, though I'm not sure about that), the tonearm does not move over the record when the START button is pushed. If I gently nudge one of the plastic cogwheels, then everything goes into motion as it should.

I don't know if this is a lubrication problem, or a problem with the electronics.

Help would be appreciated.

AU
Offline
AudioOrigin
Bronze
Posted May 25, 2019 at 19:58 GMT
#2209999

Hi,

When it does not work properly does the platter still rotate?

Best regards Alistair

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paxto (archived2)
Bronze
Posted May 25, 2019 at 20:00 GMT
#2210000

Yes

DI
Offline
Dillen
BronzeModeratorFounder
Posted May 26, 2019 at 09:09 GMT
#2210001

The cam wheel with all its little arms and levers should NEVER be lubricated.
It MUST be dry and clean and very lose to work as intended.
If you lubricated any of it I suggest you clean it all off again and wipe everything dry and clean.

Only thing that must be lubricated is the cams center bearing, which could be given a little white lithium grease, but it's rarely needed - at least not yet.

Martin

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paxto (archived2)
Bronze
Posted May 26, 2019 at 19:56 GMT
#2210002

Bravo Martin (as usual): I cleaned everything and now it's working beautifully.  

I grew up on a farm in Oklahoma, and my dad taught me to GREASE EVERYTHING. But those were tractors, plows, and threshing machines---I guess B&O turntables require a lighter touch.

 

Thanks,

Steve

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