gordak 936a schematic
Is it worth me reading the missing cap values, and the exact socket labels? Not studied exactly how though. This suggests that their failure is common.
Not sure why probing the reset pin should change the state of the Reset. The 5V supply rail track pass within about 0. If you measure the voltage across the front panel switches when they are not depresses, is there any voltage?
gordak 936a schematic - I would add a 10K to 1M resistor from pin1 to +5V and see if that fixes the problem. Not studied exactly how though.
If you measure the voltage across the front panel switches when they are not depresses, is there any voltage? Maybe if the problem is explained to Gordak, they would be sympathetic and supply a hex file to reprogram it? If it is being pulsed, the micro can never run. This was briefly tested and its outputs appear to be clean and in spec. The pictures were clear enough, and I like a challenge, so why not. Much appreciated Lots of people will benefit from your work Hope you enjoy doing it though! Trace the tracks, and draw the reset circuit. Maybe if the problem is explained to Gordak, they would be sympathetic and supply a hex file to reprogram it? So it can presumably be programmed in-circuit. The Gordak does have a separate power supply board. So it can presumably be programmed in-circuit. Thank you once again for going to all that trouble, amyk!