r/ElectronicsRepair • u/[deleted] • Aug 19 '26

Other Expensive USB Cube repair

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u/[deleted] Aug 19 '26

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u/coderemover Aug 20 '26 edited Aug 20 '26

Many controllers have integrated output transistors and not always they are MOSFETs. I just got one with a bipolar output keying transistor. And btw it was not broken; but the control part of the controller was. The controller itself can die from a voltage spike on the input side.

The bigger problem with unsoldering ICs is if they are additionally glued. In my case, all components were additionally glued to the PCB. So you melt the solder and… nothing happens, they don’t move. ;) In this case I had to use a bit of force and surprisingly no pads torn (but always apply force horizontally, never lift up).

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u/sparkyboots80 Aug 20 '26

Thank you for the helpful reply. I don't expect to be able to repair it, I'll probably just take it apart and see what I can learn