Tempo slider bpm jumps wildly

Tried rebooting?

Check the tempo Range

Click [TEMPO RANGE] in the platter to change the playback speed by 0.02% at [±6] / 0.04% at [±10] and [±16] / 0.5% at [WIDE].

manual, page 126.

I tried to reboot multiple times, didn't work. I also now tried changing the tempo range, but its still broken. When i change the tempo range, the BPM jump becomes higher.

When i bring the slider down (what should increase the BPM), it doesn't respond for some time, then it go back like 10 bpm and then starts to increase (but increase from the new value, so i cannot access the 10 bpm it jumped). Same happens when i move the slider upwards, bur inverted.

I'm going to make a video later and post here.

I have the same problem with my new sb3. How can i fix it? Thanks in advance

Same thing happened with my ddj 400, any updates?

Try cleaning your pitch slider using electrical contact cleaner. 

@Jstn & @Gilberto,

Both of you are using USB-powered controllers, and we've seen this happen with both the DDJ-SB3 and DDJ-400 when the computer is unable to deliver adequate power over USB to the DDJ.

There are a couple of things you can try, such as using a different USB port or USB cable, or connecting the DDJ to a powered USB hub. If these don't resolve the problem, it could still be the computer so please try a different computer if possible. Should it persist and it seems that the controller is at fault, please contact a Pioneer DJ authorized service centre in your region to have your hardware inspected and/or repaired.

Hello!

I changed the potentiometer for a brand new one. A month later, the problem reappeared. Then i took it to an authorized center. They said there was sand in the controller and cleaned everything. Until today, no more strange jumps.

Things i tried befor that: replacing the potentiometer, using a large variety of usb cables (with and without filters, braided, other matherials, you name it), using other computers, using 2.0 and 2.0 usb ports, using on and off battery, using other programs (traktor, serato, mixxx), using stabilizer, and a lot of things.

Its important to point that my slider wasn't instable (little jumps or trambling or moving a litte), it was jumping from 120 to 70 when i was increasing or from 80 to 200 when i was decreasing, stuff like that.

I'm glad to hear that fixing the potentiometer worked, as it is a physical contact component, it can happen that foreign debris causes it to behave erratically but we try to troubleshoot the more common causes as well. Thanks for your input.