Hi all,

I don't know if this is a warning or a request for help .

I am trying to track down a input problem where I have 3v on all my inputs (disconnected) (no load).

Looking for the 12v regulator on the circuit diagram seem hopeless as well as i cant find the component .

The isolation chips are drawn in an obscure way and not many component values are whats on the chips .

There is aground drawn on the schematic which seem to be invented by the artist.

all these things are important when chasing the missing 12v source.

Has any body tackled this or is there abetter schematic as far as fault tracing goes?

I contacted the makers last week and no reply ...so it seems my Chinese controller will have to come out of the cobwebs to any more cutting.

Please help if you can ..I am experienced with fault /repair and can usually work with no diagram but this has me floored.


PS This has been a working machine until l I hooked up a motion controller (which has the same ins and outs )