Hey everyone! This is my first post because I just got my first Moog! It’s a Source! Anyway, I love it thus far, but I am having a few problems. The first thing I noticed was that the triangle wave on the LFO isn’t working, and I’m not sure the LFO → filter is working either. The only use I can get out of the Mod wheel is with the square wave routed to the oscillators, thus causing the pitch to rise as I roll up the Mod wheel. Aside from that, I can’t seem to get any other function out of it. Perhaps this is user error, as I have yet to delve into the manual, which brings me to my next question. After playing around for about an hour I noticed that the back panel of the device is relatively warm (read: hot). I noticed the touch membrane surface starting to rise up between the “KB Glide” and “Rate” buttons, where there are two openings through the aluminum slightly exposed, and realized that the poor thing might actually be cooking itself. So, how warm is normal? I have never owned an analogue synth before and have no idea.
If I can rule out user error for the Mod wheel, what might be the problem? It may be useful to note that the exterior of the instrument is in very excellent condition, and that every button on the touch membrane causes the “Edit” light to blink when depressed, so I’m thinking the membrane itself is not at fault. I also think this because pressing the triangle wave button disables the pitch up function until i press the square wave again. So it seems like the switch is working, just that something it is triggering is broken. Could it be the oscillator, or perhaps wiring? I haven’t taken the casing apart to look inside yet so I have no idea what modifications/repairs may have been made (as if I’d even know 
).
Anyway, I’m going to start reading the manual, but I’m hesitant to power the machine up until I can figure out if it is overheating.
Thanks for reading! 