Beogram 4002 fluctuate at 33 rpm

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PierreSchwartz Posted: Sat, Apr 4 2015 1:06 PM

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My Beogram 4002 fluctuates at 33 rpm

It starts out perfect but after approx 5 minutes speed starts to fluctuate (goes down in speed)

Everything else works fine on the 4002, I have changed the drive-belt a year ago due to other issues, but it didnt remove the fluctuation at 33 rpm

Help?

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John replied on Sat, Apr 4 2015 1:46 PM

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Looking at circuit  resistor for setting 33rpm, can not see part number and pre-set resistor  1R15 should be looked at first, then relay 1RL1 contacts. The resistors mentioned above will need a small amount of switch cleaner and move the adjustment to clean the contacts, If that is not a cure clean contacts on 1RL1 .  If you are unlucky 1R15 will need replacing.  Others may know of more obscure fault.  I have never seen one of these players.

  PS Might be worth cleaning 1R14 (45rpm) pre-set and 45rpm pot adjuster while you are there.

 John.

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chartz replied on Sun, Apr 5 2015 5:23 PM

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Hi there. Welcome

First things first, replace the speed trimmers.

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Dillen replied on Sun, Apr 5 2015 5:37 PM

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chartz:

Hi there. Welcome

First things first, replace the speed trimmers.

Yes.
Then the speed switching relay.
And finally, clean and lubricate the motor bearings.

Martin