Yes, an inserted jack kills the sound. I'll have a look at TR9, I thought from looking at the schematic that TR29 might be the issue, but then I've never opened a 101 before!

Thanks for the tip, I'll give it a look right now.

No, the button seems to work as well, when you press it the light comes on and off and the arpeggiator hold function works accordingly.

Yeah it does, the Envelope works via the LFO, too.

Edit - I've actually disconnected everything now, the buttons, the keyboard and most of the bender board, it's still going.

Hey, been visiting the site for a while, first time posting, but now I need some help! I have an SH-101 that needs fixing and it seems like the gate is constantly open, it will never stop making a sound until you pull the sustain part of the envelope down. I'm sure this can't be normal activity for ...