cmd10 again

illness has stopped me asking this earlier, clarkes cmd10. little use, been unused over 12 months and lives in the house, last year it stasrted blowing the fuses on the machine, illness then stopped me looking further, so at last feeling i want to start machining again i check it out, now seeing the `overload` light lit and the motors doing nothing, checked brushes they are fine , took the speed control out and noticed blackening to the board , and unless my eyes are playing tricks one end of a resistor connected to nothing ( marked with red lines , reality is the mills little used but too handy even if only as a drill to heave, is there any advice anyone can offer on how to sort this one

Mike, the resistor is soldered into a plated-through hole, will probably be connected to a track on the component side of the board. These speed controls seem to be nothing but trouble. Can't suggest what to do other than buy a new control board, or better buy a decently designed one t replace it. KB Electronics are good.

Without a circuit diagram or any test equipment it is almost impossible to fault these kind of boards. What you can do is make a careful visual inspection for any discoloured components; resistors, transistors etc. and replace them. This may fix the problem but then again it probably won't.

Some of the soldered joints look a bit iffy (but that may just be the quality of the photo'. Retouching the joints with a soldering iron may cause normal operation to be resumed but then again it probably won't.

In my experience the best way of fixing a board like this is to first order the replacement. Then even the most trivial of home repair operations will see it working again.

Good luck, you'll need it, Colin