SUNSHINE P-3005A DC Power Supply

Anyone moving from screen and battery swaps into board repair soon needs a bench power supply. It's the tool that lets you power a phone without its battery, see how much current it draws and stop a short from doing more damage. The SUNSHINE P-3005A is a desktop supply aimed at that work.

The P-3005A is an adjustable DC power supply from SUNSHINE with voltage and current adjustment, a digital display for both readings and short-circuit and overload protection. The listing names iPhone and Android phones, tablets and other PCBs, but doesn't state the maximum output voltage or current.

When the P-3005A is needed

• A dead phone that needs a battery-free power-on test.

• A short circuit that shows as high current.

• Abnormal standby consumption after liquid damage.

• Power-on failures during chip-level repair.

Good first habits

Set the voltage and current limit before you connect anything, and check the output settings every time; the listing stresses this too. Start with a modest current limit on an unknown board and raise it only once you understand how it behaves.

Check the photos or the front panel for its output ratings before buying, since the listing doesn't give them. You'll also want a boot cable for the phones you repair.