I created a cloning cable based on the wiring diagram of the cloning board (TN207).
For the most part, it functions properly. However, about half the time, I connect it up, press reset, and nothing happens. The status led on the cloning cable just remains lit. I have tried slow presses, quick presses, multiple presses, etc., and sometimes it will start up, sometimes not. There does not seem to be any clear cause / effect relationship.
The assembly I am cloning is of our own design. It is patterned after the RCM3300 running with a 14.7mhz crystal. I have double and triple checked the cloning cable pinout and verifed that the reset button on it grounds the correct pin.
The TN207 document recommends that the master and clone be powered up together. Through trial and error, I have not observed any difference in operation no matter what order I power them up in.
Any suggestions or insight as to what else to chedk would be appreciated.