Exploring the Roland Jupiter 6

Exploring the Roland Jupiter 6 | What did I get myself into? video upload by MIDERA

"I spent too much money on this. I told myself I shouldn't get it. I knew I didn't need it. I knew it wouldn't add anything to my setup. I knew it would be a project... And yet, I bought it. The Jupiter 6.

The Jupiter 6 belonged to someone I know and have bought other things from. When we started our discussion, only 2 issues were known. The Master 2 knob and the ENV2 keytracking weren't working. I figured I could fix this. Then VCO MOD ENV-1 tracking wasn't working. Then, the unit wouldn't power on at all. They managed to get the power working again (the switch itself wasn't working). So I decided to go ahead with the purchase.

I drove an hour to pick it up.

I got it home and, yes, those issues persisted, but I tested it out and decided right then that this was indeed a mistake. My Prophet 10 is a better synth with less issues. Anyway, a few days passed and I decided it was time to open it up. I replaced the power switch. I tore out the 2 faders that weren't working. I cleaned them and fixed them. I cleaned out a few others that seemed to have intermittent issues.

All seemed well... until I made this video. It was at the very end of this video when I realized that Oscillator 2 has one voice that isn't working correctly. The Pulse wave is silent. Digging deeper into this, I've found that IC36C pins 4 and 5 are not receiving any voltage. This is voice C (or 3). Unfortunately, so far this is beyond my skillset to fix, but it seems something (hopefully common between these two pins, both related to Pulse wave and PWM) is not working. It's not a bad chip, because I swapped chips and the issue persists on the same location, i.e., it didn't follow the chip. One possibility is that this location is not soldered properly, and those two aren't receiving any information. I'm not sure. I'd have to delve deeper, but again, I'm just out of my depths here.

So what are my thoughts now? I'm frustrated that I put so much money into something that really needed more work than I originally thought... But then again, I've also learned a lot, like how to repair faders, how to do some basic IC chip testing.

I am shocked by people saying it's 'cold'. I don't know what that is about at all. Doesn't sound cold at all to me. It sounds like a proper Roland synth. But wow it has a ton of range. I didn't properly capture it here, but a few sounds I have made sounded like hitting a stringed instrument... it's like you can feel the electricity, where I don't often feel that way with the Prophet 10. It's really a great sounding synth. To me, it retains everything I liked about my Juno 6 and added a lot more. The only thing I really miss about the Juno 6 is the better feeling faders and the smoother cutoff when modulated.

All I can say is - I can't wait to have this thing back to 100%.

Happy New Year!"