Printed Circuit Board Repair Methods
Signal Injection Techniques: through this way the external signal source will be introduced and different output signal can be viewed as already known test signal, at the same time, terminal indicators of tested electronic device should be able to reveal the test result.
In the process of PCB rework, corresponding signal source must be chosen according to the specific requirement to acquire the different known signal with different icons; and moving the test probe from back part to front back part which means from the input terminal of the indicator of the tested device to inject the signal, and then push the source from end to head. inject the known, different test signals into the separate input terminal in various circuits, at the same time monitor the reaction and response of the tested device display indicator to see if it is perform normally, through which we can locate the possible malfunctions area and the reason of possible cause of malfunctioning.
