05.07.2021, 21:04
Many thanks for your reply Kai, so I measured 36v - 0v - 18v at the purple solenoid wire when the set is in play mode. There is a constant 18v at point A and at D226.
As a precaution, I decided to pull one leg of D226 and run 18v from my bench PSU to point 34 on PCB 4C and the machine works perfectly, I can see 36v - 18v at the solenoids in play mode. I substituted D226 for a 1N4007 and put the power back as it should be, and it works. I can only guess that the diode must be at fault, its an odd one too SR1K-2, whatever that is! I hope the 1N4007 will be sufficient (1A).
Thanks for your advice Kai.
As a precaution, I decided to pull one leg of D226 and run 18v from my bench PSU to point 34 on PCB 4C and the machine works perfectly, I can see 36v - 18v at the solenoids in play mode. I substituted D226 for a 1N4007 and put the power back as it should be, and it works. I can only guess that the diode must be at fault, its an odd one too SR1K-2, whatever that is! I hope the 1N4007 will be sufficient (1A).
Thanks for your advice Kai.
