Preparations for Analog PCB Board Debugging
After soldering a PCB board, it is necessary to check whether the printed circuit board can work properly or not. To avoid unnecessary danger, it is better not to power the PCB board in the beginning until you make sure there’s no problem for each step. To check the PCB board, you can do as following steps.
1. If the line connection is correct.
If you follow a standard PCB board design steps, you should check the schematic diagram where the chip’s main power and network nodes need more attention, moreover, whether the network node is overlapped needs more focus. Another point you should focus more is the components’ packaging, because different pins have different packaging and fabrication sequence.
2. If there’s a short.
The advantage of not to power the PCB board is to avoid burning your PCB board out by short phenomenon. Sometimes an explosion accident may occur, so you have to use a multimeter measure the input impedance. You’d better to add an extra circuit protection component, such as resettable fuse and more.
3. Components’ installation.
More attention should be paid to check those components with polarity, such as light-emitting diodes, electrolytic capacitors, rectifier diodes, etc. Besides, it is necessary to check if transistor’s pins are put on the correct location, because different manufacturers have different sequence of pins even the function of transistor is same.