x0xb0x – Replacing buttons with Omron B3W-4050

The buttons in this x0xb0x had been worn out over the years. I replaced them with Omron B3W-4050 buttons. These buttons are a bit pricey (compared to No Name chinese ones) but they are sealed so dust and grime will not get into the buttons. Apparently the dirt is the main reason for the buttons going bad. The Omron buttons are the buttons recommended by Robin Whittle (of Roland TB-303 Devil Fish Mod fame) for replacement in the TB-303:


The cross cut mod used her is his idea AFAIK, but it works fine for the x0xb0x also. It is a bit harder to get the caps on, but it is doable; just be careful! It is a good idea to order a few extra buttons as you might break the stem while modifying it. Be careful and take it slow!

Related posts

3 thoughts on “x0xb0x – Replacing buttons with Omron B3W-4050

  1. Great overview! What vacuum desoldering station do you use? I need one 🙂

    1. Laban

      The desoldering station is a ZD-985, it’s available under multiple brands on e.g ebay but all use the same model number (https://www.ebay.co.uk/sch/i.html?_from=R40&_nkw=zd-985+desoldering&_sacat=0&LH_TitleDesc=0&_udlo=110). It will work fine if you use the supplied cleaning rods after each use as it might clog up at the back of the tube. Make sure you buy it with the correct voltage for your area as it is available in 110V and 220V versions and it is NOT switchable. I would also recommend buying some spare part kits for consumables e.g https://www.ebay.co.uk/itm/Is-1-Glass-Set-For-ZD-985-Desoldering-Gun-New/324424986742. I managed to break the chamber while cleaning it and it was a PITA to have to wait weeks for the to arrive.

      A more expensive brand will probably be more reliable but this has worked fine for me and what I do 🙂

  2. […] or so though. If you are worried about this you can do a cross cut using a Dremel in the stem (see x0xb0x – Replacing buttons with Omron B3W-4050 for details how to do this). I encountered a small issue when having mounted right side board, some […]

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.