Any pointers with what i should look out for on it?
bring a guitar tuner with you.
ask the guy to leave it switched on for at least 2 hours before you get there.
this is because if it's been calibrated cold it will be out of whack a little when it's warmed up.
check its been on for long enough by touching the back. it should be very hot.
check every function. check the midi. if you can be bothered, check the cassette interface. (do this last after everything else because if the cassette interface is no good you may
end up junking the patch memory)
don't forget to check each waveshape out. turn the volume up to max and make sure there's no distortion on the output. listen for crackles squips, blibs, blops and cut outs. all these horrible sounds are due to bad connectivity. nothing major, but will require service if you hear that. if you do hear these sounds and he claims it's just a dirty key, play it through midi to check.
don't freak out if you can turn (or modulate) the pulse width so far that the sound stops. this is normal and good. also the knobs do nothing until you hit EDIT. and make sure the release button is on.
check the calibration as follows:
hit tune. it should tune within 11 seconds at most. hopefully only edit 2 to 6
seconds if its in good shape.
make a patch that has a fast filter envelope, hit unison , turn up resonance. now play a key and listen out for the filter peaking. if you can hear separate peaks, the synth hasn't been calibrated well.
now take the guitar tuner out and plug it in. (you'll still need to hear the audio.)
make a basic square wave patch, no resonance, make sure not to hit the sync key. tune the oscillators as best you can so they play the same note (it doesn't matter which note, just as long as it's the same pitch relative to each other) turn down osc2 in the mixer section, make sure you have the sustain on max and the attack on min for the amp envelope. now save the patch.
hit the tune button
check the tracking and the tuning of the separate voices.
there's five of them and the way to isolate a single voice on the rev2 is to play key with your thumb and hod it down.. lets say middle C.
hold that down and check the guitar tuner. use the master tune to make it hit exactly C.
now play 5 other notes consecutively and hold them down as you play, the synth will allocate a new voice on each key press. on the 5th keypress it will release the voice on middle C.
now take off only your thumb from C and put it back again. the synth has now allocated the next voice to C. check the guitar tuner. hopefully it's still bang on C, if it's out by more than 8 cent, the synth needs a calibration. do the same with the other voices. eventually you'll come back to the perfect C voice again. now edit the patch and turn osc 1 down and osc 2 up. do the same thing (don't hit tune again)
now hit another note with your thumb to check it's tuned to the correct whole note, cycle though the voices to check this new note. this will test the scaling. i know an engineer in london that will service your pro5 for £120 so you can ask the guy to go down on the price buy that much if it only needs calibrating.