Hi Folks, I replaced all the tact switches on the board as some were not working properly.
it worked fine for awhile but now the assigner board and programmer boards switches are unresponsive, the displays constantly shows program P5 / parameter 61 kinda strange..and won't respond to any pushbuttons. The PSU +15/-15/+5 volt rails are good. Both programmer & assigner boards have voltage, checked all transistors and diodes and are good on both.
Has anyone seen this type of problem before? I doubt both processors have gone suddenly bad
Looking at the prints, I can't seem to find whats common to both boards?
is there a re-boot sequence?
any ideas?