Arachnid rotary troubles...

[Kinski]

So I built two arachnids in one box. One works perfectly, the other has an issue. Patch positions 2 and 3 don’t work. Using a multimeter set to continuity, I found that the rotary is not connecting to itself on pins 2 or 3 when selected. Not sure why this is. Perhaps a bad switch? Is there a way to work around this?

 

[zgrav]

make sure you have good connections to the board for the pins for 2 and 3, since that would be something you could easily fix. You could also see if there is a problem on the board between the pads for those two pins and the FV-1 chip (the schematic shows that pin 2 should connect to pin 16 and pin 3 should connect to pin 17). if you have confirmed the terminals on the rotary switch for the 2 and 3 positions are not connecting to the center terminal it sounds like a bad switch. I don't think you have an easy workaround aside from replacing the switch.

 

[Kinski]

Yeah, I’m sure it’s the switch. Switch Pins are correctly connected to FV1 pins 16 and 17. It’s just switch itself. The center pin of the switch does not connect to pins 2 or 3. I’ll look into getting a replacement.