Motor When im playing a record it wont keep a constant speed it slows down and speeds up slightly.

Try replacing the drive belt. Look under the platter for a 'rubber band' that would connect the platter to a drive motor. I bet it's loose. My other idea is crazy, however, they do sell an item called a "variac" which has a knob to control the voltage to the player. It's big and bulky and not worth the trouble. I'm a musician so I have to have a player up to speed or slightly detune my guitar. Good luck..

Acceleration is defined as a change in speed, either a negative acceleration (slowing down) or a positive acceleration (speeding up). If you have constant speed, you are not accelerating.---------------------------------------------------------------------------------------
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You may be experiencing Acoustic Feedback, although it doesn't really make any sense the way you describe it. Make sure the tonearm is balanced and the proper weight is dialed in on same. Does it make any difference if the volume or bass are turned down, which my point to the Acoustic Feedback.

Found this post trying to troubleshoot my Aiwa PX-E860U-after replacing the belt and lubricating bearings, the speed was off. 33 setting was playing slow. Here's the fix:
1. unplug and flip upside down
2. Locate the two holes marked 33 & 45 where black dots are visible underneath
3. Using a very small flat screwdriver(I used one from an eyeglass repair kit), adjust the speed clockwise for faster, counterclockwise for slower

this is a DIY solution, so not perfect, but it works. I played the tracks along to a Spotify recording to get a good match. Hope this helps someone else!

Hello Rosie,

Some turntables have a pitch adjustment feature which allows you to speed up or slow down your records. The adjustment controller is usually a slider or a wheel somewhere on the turntable and is usually labelled "Pitch" "Adjust / Adj" or "Pitch Adj".

Please check for this feature on your turntable then get back to me if you are unable to find it. Please include the brand and model number of your turntable.

Hope this helps.

Regards,
BElectric

do you mean high engine speed or fan speed.
if fan speed is slow then motor in the fan is getting bad.
if your talking about running engine, then could be nothing because the sensor tell it not to..like running down the road it cools the car down and engine temp drops slightly enough to cut sensor off.

The turntable motor might be the problem, if the grease is old it becomes hard causing the turntable to run slow, by your description we can rule that out since you indicate it runs to fast. therefore it is the voltage that powers the motor with a regulator "keeps voltage constant" or the motor itself will be the problem. The pitch control allows a small change in speed when required.

I'm assuming your desktop has an AMD processor?
AMD have a process called "quiet and cool" this basically speeds up the fan when the processor is under load and getting hot or slows it down when the processor isn't working as hard.
Regards
Mike

There is no pitch control on this unit.

If it's slightly faster than normal, that's fine. You'll just need to check the rollers and tighten them slightly as well. They might be loose or sort of that.