Hi, I refurbished one of these a couple of years ago. I am not a luthier, just a bass player who likes tinkering around with old basses. Old pots can crackle a lot and it's usually down to a build up of dirt/dust etc etc. So first try to clean them. Take the knobs off and try spraying 'sparingly' a 'little' WD 40 on the pots' shaft, where it goes into the body. Then turn the shaft back and forth slowly for a minute, wipe off any excess that is on the woodwork. Give it 5 minutes, then plug it in and see how it goes. This worked for me, hopefully it will for you.
Status S3 Headless (Movingui facing)
Status S2 Headed Thru neck (Walnut)
Jaydee Supernatural Roadie IIA
Warmoth Jazz (DIY)
Ibanez AEB10E (Acoustic bass)
Thanks for the replies, i will give it a try.
According a post on a washburn guitar forum these basses seem to have the PS1 board.
And indeed print has pre-set 1 on the back but the volume pot legs are bend to be able to fit. This print is still available, but will try to clean pots first.