Access Virus B Potentiometer Replacement

I had a loose shaft on a resonance potentiometer so I replaced it. This video shows that work but also contains a discussion of various tools that I use for synth repair. See additional info here: erichizdepski.wordpress.com/2...

[@chaunceymuppet]

Thanks for taking the time to show us this process! Just got a used Virus Rack unit and the pots are a bit sketchy--probably just going to clean the pots but I may get some spare ones to keep on hand just in case.

[@Bowwylad]

great video, will this pot work cant find yours? PTV111-3415A-B103

[@Maschinestorm]

DeoxIT works well on the contacts and pots. Replaced the LCD with an OLED on mine. Haven't replaced any caps or pots yet. Battery upgrade is always a good idea and fac reset.

[@nathanbell6962]

I turned mine on after 20 years and the patches have scrambled names, any ideas?

[@ErichIzdepski]

Change battery and reload the firmware. You can load from a DAW. Make sure the firmware matches the hardware. There are two versions- I think called 't' and 's'. A tiny letter will show in the display on startup.

[@ipointmedia]

I have a hardware bug that after switching on it is always set in EFFECT mode, so the EFFECT light is on. If I click CONTROL or EDIT it stays for a while but switches back to EFFECT. If I click SINGLE in order to change the patch it switches back to EFFECT. I can play the synths, I can switch the preset via MIDI, MIDI is working and the battery was exchanged. The problem stays. Any ideas?

[@ErichIzdepski]

Maybe a dirty switch contact that keeps it on? Misaligned plastic button cover? I don't think it is a setting but possible reflashing OS could clear it up.

[@ipointmedia]

@@ErichIzdepski Thanks for the quick answer. I was treating the synth very well over the years. The only problem could be the dust. That is why I already tried contact spray which didn't help. I also updated to the latest version. Can I replace the plastic button or lift it up to clean it? Any idea to replace the button? What do I need to buy then if still available? It feels that after a while of heating up the problem gets worse and if I can't click the EDIT button and it stays in EDIT other buttons won't work too.

[@ipointmedia]

it looks like the more LEDs in total are on, the more likely it falls back to EFFECT mode (11 LEDs are a key number here). More than 11 make the fall back more certain and quicker. So it looks like that there is a stabalizing problem of power. Clicking on LFO 2 and Transpose might also emphase this effect but this could be that with LFO I get more LEDs on. Could that be a hint for a capacitor? And if the question is which one?