Rework is also commonly known as repair in a pcb factory, which is fundamentally different from repair.
Rework generally refers to re-processing of unqualified pcb circuit board products by using the original process or replacement process to ensure that the processing quality fully meets the requirements of drawings or technical specifications. Repair refers to the act of restoring the function of a defective product. It cannot ensure that the repaired product complies with applicable drawings or technical specifications.
Rework is not a standard process. The following only briefly introduces some of the major risk issues encountered in PCB repairs.
Reworked process goals:
(1) Non-destructive process (in any assembly or rework process, PCB, adjacent components and components to be removed should not be damaged).
(2) Controllable, reliable and repeatable process (in order to obtain consistent and acceptable results, a trained operator should reuse this process and adjust it if necessary).
(3) Efficient processes (processes that can be performed quickly and easily in a production environment, without time pauses).
What are the rework procedures?
Rework includes a lot of things, the usual task is to replace components.
The component replacement process includes three basic procedures of removing components, arranging pads, and mounting components. Sometimes, it is necessary to consider the structural components of electronic components, and the removal and replacement of conformal coating.