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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

B&O Beomaster 900 - Tuner stuck in MW - can't move dial

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darrenhales
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darrenhales Posted: Thu, Mar 20 2014 1:52 PM

I recently inherited a Beomaster 900 and started it up. That radio worked fine, until I moved the MW dial all the way to the left. When it got as far as it would go, I wen to turn the dial clockwise, but the dial was then stuck in the far left position. 

Although the knob turns fine, the dial doesn't move from it's far left position and so can not tune into any MW stations (the FM one still works fine).

Any ideas if this is something I can fix myself?

 

Dillen
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Copenhagen / Denmark
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Dillen replied on Thu, Mar 20 2014 2:58 PM

It's all mechanical.
Take a look inside and see what is blocking/binding or slipping.

Martin

Christian Christensen
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Stockholm
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Dillen is  of course always right :)

I add with some small tips.

The thread inside moves ontop of  the wheels on a magic amount of friction to grip.

If radio has been in a ktichen it might be fat dust that makes the thread slip, to less friction, clean wheels heads and thread with quetips and alcohol.

but gearwheels and axels of movement, they need low frictions,oposit ,a fraction of a drip of sewingmachine oil, will help on the right places.

Be just careful that you dont add oil onto the thread, if you do you have to start all over of cleaning as thread once again wont grip.........


The big capacitor, with the big wheel, if you look inside there is gearwheels there. Sometimes those gearwheels need a little oil.
and i mean a little, one drip of oil is way to much,  just dot the head of a small screwdriver in oil and dot it on the gearwheels
Sometimes this manouver does a magic trick.

Mechanics, some parts needs lower frictions and some higher friction, have a look and you will figure it out

 

Christian 

My re-capped M75 are my precious diamonds.

darrenhales
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Thank you all, I've cleaned it and oiled it a little and now seems to be working perfectly.

Brilliant!

 

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