Thanks so much James - very helpful. I’d read that section of the manual but Figure 1 doesn’t actually show the PCB and the jumper positions; it’s a schematic illustrating the routing of the CV and Gate signals to the bus. And since I couldn’t remember whether I’d changed the jumper positions when I first had the module I thought it best to check before inserting it in the A-100 case. As it turns out I had removed them.

I don’t have the module to hand at the moment (on vacation) but I recall that there are three pins for CV and three for Gate (although my ‘little grey cells’ might be letting me down). If I’m right, for future reference, which pins do I need to short to put the module back to factory settings

Thanks again for the advice.