Small Component, Big Impact

Diodes are tiny components on circuit boards that control the direction of electrical current. When a diode fails, it can cause a device to stop charging, lose power unexpectedly, or display other electrical faults. Learning to identify and replace faulty diodes is an essential micro-soldering skill that applies across phones, tablets, and game consoles.

This module teaches you how to use a multimeter to test diodes in circuit, how to read board schematics to locate the correct component, and how to remove and replace diodes using precise soldering techniques. Because diodes are so small, this work requires a steady hand, proper magnification, and the right tools.

You will practice on our custom boards that include various diode configurations matching what you will encounter in real-world repairs. We cover both standard diodes and Zener diodes, explaining the differences and how each functions within common device circuits.

Diode replacement is one of those skills that separates a basic screen-swap technician from a true board-level repair professional. Once you can confidently work with components this small, you will find that many other micro-soldering tasks become much easier.