Hi, I now have a non-working stock EX-800 it fires up but no sound. Just wondering what are (if any) differences between the ex800 and poly800 Eproms. Obviously there is no joystick so the D/A calibration can be adjusted to 1.986v on IC10 pin7 but no upward/downward pitchbend...but wondering if I can swap a poly800 eprom in there OR install the EX800 motherboard in the poly800? Also noting that the midi is not working on the EX800. Circuit #20 EG control waveforms up to IC12 are ok so far..
Any help or ideas appreciated.
thanks