Keyword: pcb board , pcb , circuit board, board assembly
PCB re- examined and tested pcb board, either bare board or full load assembly plate , if found defective , we need to evaluate cost-effective method of repair , and to provide users with the original product with the same reliability. For only a few simple defective pcb board, its further processing is usually not economical. However, many circuit board has a high complexity , full load board assembly may price is high, this time on the failure of the product for further processing to pass the test will be more economical pcb board. Usually not bare board for repair , as this will give the future brings reliability risks assembled using Moreover, compared with the assembled board , bare board prices are relatively low. Taking all these factors , the high reliability pcb board And military applications , do not allow the bare boards for repair and re-processing, pcb board re- processing of the bare board can only be used commercially .
However, pcb board the board must meet the maintenance requirements of the original design , in line with expectations for reliability and quality standards Standards. In addition, some of the circuit board used to carry out repair and re-processing, in most cases pcb board, the existing components to be removed and replaced with a new part , this operation is usually performed manually . For the use of plated through holes of the board, maintenance work can be like a soldering iron and the capillary action from the braided cord and other such simple tools to complete. On the other hand , the SMD, requires a special re- machining table , depending on the hot air reflow soldering device pcb board. In the repair process, the need to use a lot of chemicals , especially in cleaning , moisture exclusion pcb board, flux removal , lubricants clean , freeze spray to locate the heat sensitive components such processes pcb board.
