XDJ RX low eq cutting on channel 2

Hi all,

I just bought an xdj rx used and have found an issue with it. The low eq on channel 2 cuts in and out, as in the lows themselves seem to cut in and out. There seems to be a bit more play in the eq itself than channel 1, and slightly less resistance. If I push the knob up a little then it comes back in.

What would be the easiest way to resolve this? Is it easily repairable or is it something thats going to be allot of hassle. 

Thank you,

Callum