A Treadmill Powers On But The Motor Does Not Run Repaired
An out of town customer brought me only the board of a treadmill to look at and get it fixed. As I checked the board, I could see that someone tried to get it fixed but for some reason the repair was not successful.
The Mosfet was already taken off board and if you look where the arrow is,
there is a yellow loose connection laying around not connected to anything.
The place of that Mosfets was completely destroyed but the customer brought that shorted part with him when he came to my shop.
The part number IRFP 460 which is well known and found in this kind of device and of course I have plenty of in my shop.
That is the metal heat sink that the Mosfet and the diode were sitting against and as you can see, it is very dirty and the thermal paste was dry.
I put the Mosfet back on board, checked everything around that area for bad parts but everything checked fine. I cleaned the metal heat sink, added fresh thermal paste to the parts, tighten up the screws and put everything back together.
Since I do not have the rest of the machine (too big to move) I called the customer and we went together back to his house for testing. I was not allowed to take photos of the final product but everything was running smoothly and to that I could say…
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 repair articles in the link below: