TNP #25 – Teardown & Repair of a Keysight E36313A Triple Output Programmable DC Power Supply

In this episode Shahriar repairs a broken Keysight E36313A with a blown fuse and burnt smell coming from the unit. The teardown shows the dual-board design of the unit as well as the large toroidal transformer. The magic smoke has escaped from a dual Schottky diode power device with a Vf = 0.45V at If = 5A. The replacement eBay component is first verified to meet the specifications and installed in the power supply. The Keysight unit is then tested at a few output voltages and current to ensure proper functionality.

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