Yun Industrial provides common rework and modification services for your existing printed circuit boards. Our service is custom to fit your needs and includes a wide breadth of leading-edge technology and trained staff to complete the work on schedule or as a rapid 1-day assembly. For rework and modification, we provide refinishing operations or repair of an electronic printed circuit board (PCB) assembly, usually involving desoldering and re-soldering of surface-mounted electronic components (SMD). 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 specialized tools are used to pick up and position often tiny components.