Too high voltage? (Solved)

[erwin_ve]

Voltage going in 14v in ac is no problem.
Can you measure the voltage at the voltage regulator:
Pin1: ?v in dc
Pin3: ?v in dc

[norburybrook]

I have 14,4 volt going in from the transformer to the relay board yes, a bit high maybe, but tolerable?

the transformer should be going to the rectifier/filter board then to the regulator.

what have you got coming out of the board to the regulator?

the regulator can take up to 30 vdc IIRC.


M

[Oddvar R]

Pin1: 83mv in dc
Pin3: -0.001 mv in dc

[Oddvar R]

I have 14,4 volt going in from the transformer to the relay board yes, a bit high maybe, but tolerable?

the transformer should be going to the rectifier/filter board then to the regulator.

what have you got coming out of the board to the regulator?

the regulator can take up to 30 vdc IIRC.


M

I am using this board configuration? V reg output to pin 3 and V reg input to 1? Might it be the other way round?

[erwin_ve]

Desolder the wires that are on pin 1 and pin3 from the voltage regulator; what is the voltage on the top right electrolytic that is on the relay filter board after desoldering and amp stby?

[Oddvar R]

It's 0.8 mV.

[erwin_ve]

And now measure the ac in points on the same board in v ac.

[Oddvar R]

That is 14.4v ac.

I have changed the diodes, there are some 7vac going across them, if that means anything.

I have two 1000uf electrolytes, but they ate only 16v. Would they be ok for testing?

I am attaching two pics of the board, if someone sees something I am missing?

[erwin_ve]

That is 14.4v ac.

I have changed the diodes, there are some 7vac going across them, if that means anything.

I have two 1000uf electrolytes, but they ate only 16v. Would they be ok for testing?

I am attaching two pics of the board, if someone sees something I am missing?

The electrolytics on your pic says 1000uF/35v , leave them alone.
So after changing the diodes, how much voltage(in dc) is between the right top electrolytic and earth?

[Oddvar R]

No change, it's the same.

[norburybrook]

are the -ve, bottom of your caps tied together, to ground?


M

[Oddvar R]

Yes they are, I have gone over the board many times, so I am blind maybe...

[erwin_ve]

What is the resistance of the right top electrolytic on the relay filter board to ground (amp off) in (k)Ohm?

Also what/where exactly did you measure here:

I have changed the diodes, there are some 7vac going across them, if that means anything.

[Oddvar R]

I don't know if this means anything, but the 84 mV's seem to pop up later?

[Oddvar R]

I wonder if the wire from the top right positive side of the cap is going straight to the V reg pin 1? It seems like it's connected to the diodes, but is it?