Here we go again.
Another rotten dog f**k up
this time its a replacement power supply / solenoid driver board

the 2 mistakes i found is:
A: the led for the high voltage section grounds to the +5 power supply ground. problem being if you have a bad connection on the ground for the 5 volt supply it feeds 180 volts Via the led and a resistor to the ground on the +5 circuit and gives you the impression that there is no +180 volts for the displays.
Plus it reverses the polarity for all the I.C,s on the power supply board.

Then you have J4 PIN 8 for the flipper control relay, no pull down resistor so if you have a bad connection to J4 pin 8 you will have a oscillating flipper control relay.

I will post the upgrades to get rid of these potential problems soon

   

Mate i didnt understand a f##ken word of that, lol ahaha went straight over my head you tech heads are way to clever for me, lol