So, my 400CX is tripping the rear breaker.
I have replaced a number of PNP and NPN transistors on both output boards as they were testing kaput, plus a bank of .47 and .2 ohm resistors that tested open.
This has made no difference.
The workflow is as follows
Power On - Standby LED illuminates
Button Press - Reg LED illuminates then Bias then click breaker
So all LED illuminate which for debugging is not helpful, I am going to check for when the high signal occurs on the breaker, as this is clearly being sent high (or low I am not sure if it is active LOW or HIGH but I will tell)
It would be good to understand what conditions the MC tells the breaker to trip, there is mV of DC on the terminals even when it trips, so it is not that, I do not know any of the other conditions.
Any help is as always appreciated.
Kiitos
Björn
I have replaced a number of PNP and NPN transistors on both output boards as they were testing kaput, plus a bank of .47 and .2 ohm resistors that tested open.
This has made no difference.
The workflow is as follows
Power On - Standby LED illuminates
Button Press - Reg LED illuminates then Bias then click breaker
So all LED illuminate which for debugging is not helpful, I am going to check for when the high signal occurs on the breaker, as this is clearly being sent high (or low I am not sure if it is active LOW or HIGH but I will tell)
It would be good to understand what conditions the MC tells the breaker to trip, there is mV of DC on the terminals even when it trips, so it is not that, I do not know any of the other conditions.
Any help is as always appreciated.
Kiitos
Björn