I have found the fault with my mixer ( UB2442fx pro) but I need to be able to identify 2 components that need replacing. The first is the rotary pot vr96 (aux 3 / fx) and the second is the rotary function switch SW1 (efx selector) Both components are made by Alps and available, I just need to know the value of the VR and the Alps part no of the switch. Both are still fully functioning but have been physically damaged. There is a compny here in the UK who can supply these parts, but I do not know which ones to order. Many thanks

The VR96 is a 50K "G" taper or "graphic taper" pot. Lots of luck trying to find that in a catalog... I finally got a scrapped piece of mixer board and salvaged one. The G taper is not stocked by any of the vendors like Digikey or Mouser here. Full Compass is the Behringer part distributor and I waited 6 months and got no delivery of one of these pots. The effects selector is a rotary encoder quadrature type. Use the Mouser.com catalog. Search for Encoder, then select ALPS manufacturer and then try to match up mounting and type using the spec drawings... with push switch also... Again, if you want to try Full Compass, you can call Behringer rep in Woodinville WA USA to get the Behringer part number and incident number to see if Full Compass might have one in stock.

Here is the maintenance schematics for your unit...VR96 is on page 7 of 32. :

http://elektrotanya.com/behringer_ub2442fx-pro_sm.pdf/download.html

Scroll down to "get manual" and click on it to download. IGNORE other download links as they are for viewers, etc.

Note, You may have to cut off a shaft on replacement to the right length to match existing shaft.