Please check the following things.

1) Is the firmware the latest?

The firmware is system software program on DDJ-SB2 device.

Please update the latest firmware to enhance the product's performance.

2) Aren't the jog dials dirty?

Because the jog on this unit has a touch sensor, dirt or hand cream on your hand onto the jog would prevent the touch sensor from fully functioning.

Please use a soft and dry cloth for cleaning the jog.

Clean the stain with the dampened and wrung-out cloth with diluted neutral detergent by 5-6 times of water.

Then, wipe the jog using a dry cloth.

3) Please conduct the following test to sort out the cause:

-Touch on a jog with one hand and touch on any part of DDJ-SB2 other than the jogs with another hand:

　If the jog does not work, the unit itself could be the cause of this problem.

　If the jog works, the problem could be caused by the devices connected to the unit.

-Depending on your computer, especially for a Build-to-Order PC, an amplifier connected to DDJ-SB2 and the grounding conditions, the touch sensor of the jogs might not work properly as expected.

Jog Wheel function

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The JOG dial does not react even when touching it.