Numark TT1650 When I hit switch to start the turntable it starts ok but when I hit the switch again to stop it, the turntable starts to speed up really fast then after a few moments slows down, could this be the motor ?

SOURCE: Numark ttx turntable

More than likely the drive IC (integrated circuit) has shorted, and needs to be replaced. Not an easy fix, and you'll have to take it to a service center for replacement.

This is a common problem on this turntable.

- OPTiC
Turntable Repair Expert
Digital Analog Therapy

SOURCE: my numark tt1625 turntables keep

If you could be a little more specific, we might be able to help you out better.

Does it slow down, when you do anything, or after a long period of time of being on/used? Or as soon as you turn it on, it slows down?

Any specific information would be greatly appreciated.

- Davis
DJ Pro Audio
www.djproaudio.com

SOURCE: Too slow?

http://www.archive.org/details/Turntable_Belt_Installation

above is a generic video that applies to almost all belt driven turntables including yours that will show how to install the belt and a few other things.

this can be caused be a new belt being too wide, you may need a narrower belt.

SOURCE: help for technics 1200 MK2 and 1210 Speed is too fast

On the 1200MK2 the pitch control slider is for just that purpose. Disregard the 0 setting and use the illuminated strobe marks on the platter to adjust to nominal speed. When they appear to be motionless you are there. The control on the 1210 may be a knob but the same principles apply.

http://en.wikipedia.org/wiki/Technics_SL-1200

SOURCE: My Numark TTX Turntable turns on but wont spin

It's probably the motor drive IC Chip.

Send it to us for speedy, cheap repair.

http://www.reflexdjsuperstore.com/Service-and-Repair-p11441/