Rework (electronics) Printed circuit board
Rework (or re-work) is the term for the refinishing operation or repair of an electronic printed circuit board (PCB) assembly, usually involving desoldering and re-soldering of surface-mounted electronic components (SMD).
Mass processing techniques are not applicable to single device repair or replacement, and specialized manual techniques by expert personnel using appropriate equipment are required to replace defective components; area array packages such as ball grid array (BGA) devices particularly require expertise and appropriate tools. A hot air gun or hot air station is used to heat devices and melt solder, and specialised tools are used to pick up and position often tiny components.
A rework station is a place to do this work—the tools and supplies for this work, typically on a workbench.
Reasons for rework
Reasons for rework of electronics include:
Poor solder joints due to faulty assembly or thermal cycling.
Solder bridges—unwanted drops of solder that connect points that should be isolated from each other.
Engineering parts changes, upgrades, etc.