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Hello - first post. I  have a new XPH10 cordless hammer drill that suddenly will no longer run but the light does come. Switch tests OK. Battery  fine. I am not getting any voltage to the brushes. There is a small rectangular piece about 1/8 thick attached to a heat sink which sits under the motor. 3 black wires go to it. There is continuity through all wires so none are burnt. I have a feeling that is what is wrong but can not find that part in any schematic. What is it? Any other ideas?  Can't send it back. I live in the Caribbean and it will cost more than the drill is

worth.Thank you   Bruce

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Motor controller transistor. The one currently installed in the drill should have a product code which you can search to find a replacement. They're quite cheap to replace.


If you have continuity at all three points it most likely is faulty.


It doesn't have its own item code on the spares catalogue, however. 

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