It is commonly known that recover PCB card needs to use a schematic diagram in most of the cases, particularly when the broken PCB card is complicated and comes from the application unfamiliar with repairing engineer, even if the engineer has acumulated sufficient amount of experience from previous work, he won’t be able to fix this issue promptly and effortlessly, hereby we list some of the main principles that can be followed when try to recover PCB card to increase the working efficiency:
Recover PCB Card in the absence of Schematic Diagram
Inspect and recover PCB Card from internally to externally by using the online rework station, if the circumstance is allowable, it is better to use a proper functional PCB Card to compare the defected one, and use twin rod VI curve scanning functions to make the comparison, and the comparison point can start from the terminal then slowly and steady spread into the other area especially the comparison on the capacitors, can recover the disadvantage of multimeter which can not measure if there is any leakage on the electro-capacitor online;
