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Auto adjust JVC jl_a1 turntable with new belt but runs too fast. How to adjust?

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  • Mark Giles Apr 28, 2013

    Looks to be no adjustment however problem resolved by bending up the lever for the 45/33 change mechanism to push the belt up higher and sit on the centre of the spindle at the 33 speed seetting. Ran at the correct speed at this point. Hope this helps others faced with the sme situation.

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  • JVC Master
  • 5,011 Answers

You could have got the Belt in the wrong position. If correct try looking underneath the turntable for small presets. They might be hidden or covered up. If you can't see them you will have to take off the bottom and look on the PC board for them.

Posted on Apr 29, 2013

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SOURCE: JVC Turntable model AL A1 BKX , need to know how to adjust speed

I have just fixed this problem on my Aiwa PX3800 with improvisation.
The platter was rotating too slowly, I didn't know how much too slow only that the records sounded wrong.
I imagined the belt, motor and platter as a bicycle gear and so simply increased the gear... I achieved this by winding a thin strip of a electrical insulation tape around the motor head to increase it's radius (like changing up to a larger front cog on a bicycle gear).
I could then time the rotations and remove a layer or two of the tape accordingly until I have achieved a perfect 45rpm. 33 is still way out but I only listen to 45s!
Be sure to trim excess tape from the motor head with a craft knife/scalpel or it'll stick to the platter.
Poor man fix up.

Posted on Dec 23, 2011

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I have just fixed this problem on my Aiwa PX3800 with improvisation.
The platter was rotating too slowly, I didn't know how much too slow only that the records sounded wrong.
I imagined the belt, motor and platter as a bicycle gear and so simply increased the gear... I achieved this by winding a thin strip of a electrical insulation tape around the motor head to increase it's radius (like changing up to a larger front cog on a bicycle gear).
I could then time the rotations and remove a layer or two of the tape accordingly until I have achieved a perfect 45rpm. 33 is still way out but I only listen to 45s!
Be sure to trim excess tape from the motor head with a craft knife/scalpel or it'll stick to the platter.
Poor man fix up.

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