TUNE and ARPEG UP-DOWN buttons

[hotswank]

Hi, I'm not sure if this could be related to the GliGli Teensy upgrade, but lately my TUNE and ARP Up-Down buttons no longer work. HOWEVER, sometimes they do and I don't understand this. It's prolly not the membrane switch so what else could it be? Anyone has similar behavior of these (or other) switches? Thanks.

[hotswank]

Update: I've reinstalled the original Z80 CPU and both TUNE and ARPEG UP-DOWN are functioning correctly again.

[matrix12x]

If the Gligli mod worked otherwise fine in your synth, it sounds like one of the pins on your Teensy may not be making contact with the socket properly.

[hotswank]

Fast forward several days: I accidentely left the ARP ASSIGN on for at least 30 minutes and after that, the P600 went absolutely crazy: touching the pitchbend crashed the P600 hard and after a while it did not work at all and all kind of LEDs turned on upon power cycle. So I flashed the Teensy with sysex once again and this solved the pbwheel issue but all the presets where corrupt and now OSCA/B FREQ did not work properly either, so I pulled the Teensy and flashed it again over USB with Teensy Loader for Mac (in order to do that I had to restore the trace-cutter 5V pad with a blob of solder). Now it's working fine except for the same TUNE and ARP UP-DOWN buttons. I'v also tried different p600fw in the past to no avail. I'm currently using the 2.10 third release candidate v2_0992 BTW. Hope this helps someone in the future having similar problems with erratic behavior of the Teensy! I did check all the pins and also put some extra solder on pin30 for a snug fit.... I now wish the auto tune during powering up from previous firmware versions was still present! All I had to do then was power off-on during recording if the oscillators were drifting. Oh well...

[matrix12x]

Make sure you don't have a counterfeit Teensy.

[hotswank]

Update: something was wrong with the PB wheel and/or CV circuit and this caused all kinds of problems mentioned before. I tried to calibrate the wiper voltage (2,5V when centered while adjusting the pot and I accidentally over-voltaged the CV circuit I guess). Good thing is ARPEGGIATOR, OSCA/B FREQ, ARP UP-DOWN and TUNE buttons all work again. Pitchbend is now dead but when repaired I will report the problem when it's fixed.