PCB Fault Finding

Solder Bridges

Solder bridges are unwanted flecks of solder that cause shorts between two or more tracks on a PCB.

pcb-fault-micro-pin-short-close-up-02 A solder fleck between two microcontroller pins, causing a short.
pcb-fault-micro-pin-short-close-up-01 Flux residue ontop of some microcontroller pins.

Flux Residue

PCB soldering flux is designed to be as PCB-friendly as possible, but flux residue from soldering can still cause problems in the long run (e.g. accelerated corrosion, moisture absorbtion leading to conduction).

flux-residue-on-pcb-close-up-01 Flux residue ontop of some microcontroller pins.
flux-residue-on-pcb-close-up-02 A solder fleck between two microcontroller pins, causing a short.