Drilling Machine Repaired
A customer brought this drilling machine for repair and explained the issue to me. He said if he wiggles the power cord, the machine would work but he starts to see sparks then the machine goes into shut down.
The customer put an electrical tape around the cord and according to the customer it worked for awhile then the problem started.
I think it is a power cord issue but let us find out for sure.
There were three screws holding the black cover piece and once these were out I was able to see where the two wires meet with the power switch.
As seen, very dusty areas near the power switch but I will clean that area later one once the repair was done.
I connected the drill to my current limiter and powered on the drill machine and right away I could see smoke coming out from power cord area but not near the power switch.
Once the defective area was found, it was time to trim it out and connect the good part directly to the power switch.
This is the defective part of the power cord and after cutting it off.
The defective part of the power cord was the brown wire and you could see burnt marks on that.
Before connecting the power cord to the power switch I decided to add these metal shields for better stronger joints.
I added and pressed the metal shield parts on the two wires, connected both of them to the power switch and fired up the machine; it worked like a charm. I put everything back together and called the customer for pick up.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
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Note: You can check his previous article on Faulty Transistor Caused LED Blinking