CNC Dan
Veteran Member
Did you measure the volts accross the diodes both ways. AC or DC?
Do you have a clamp on ammeter?
Can it read DC current?
A good diode should block current in one direction(showing full volts), and pass current in the other(showing low volts). But with 60hz AC you will have both happening.
Could you put a battery on the AC side of the diode bridge, with the transfomer disconnected?
Add a small load an check the diodes again. And then reverse the battery connections an check again.
I'm sure your problem is in the diodes. Just not sure witch ones.
Are they expensive? If not, I would just replace them all.
Do you have a clamp on ammeter?
Can it read DC current?
A good diode should block current in one direction(showing full volts), and pass current in the other(showing low volts). But with 60hz AC you will have both happening.
Could you put a battery on the AC side of the diode bridge, with the transfomer disconnected?
Add a small load an check the diodes again. And then reverse the battery connections an check again.
I'm sure your problem is in the diodes. Just not sure witch ones.
Are they expensive? If not, I would just replace them all.