What are the steps and methods for PCB debugging?

For a new PCB Model , Novices often encounter some difficulties in debugging , Especially when the sample is large 、 When there are many components , There is often no way to start . that ,PCB What are the steps and methods for circuit board debugging ？

One 、 Board surface observation and resistance inspection
First, make a general observation , Is there a problem on the board , If there are cracks , Whether there is short circuit 、 Open circuit, etc . If necessary , Check whether the resistance between the power supply and the ground wire is large enough .

Two 、 Mounting elements
Independent modules , When there is no guarantee that they will work properly , It's better not to install all of them , But part by part , It's easy to determine PCB Fault range .

3、 ... and 、 Check the output voltage of the power supply
Generally speaking , You can install the power supply first , Then power on to check whether the output voltage of the power supply is normal . On power up , Consider using adjustable regulated power supply with current limiting function .

Four 、 Preset overcurrent protection current
Set the overcurrent protection current first , Then slowly increase the voltage value of the regulated power supply , And monitor the input current 、 Input voltage and output voltage . If in the process of upward adjustment , There are no problems such as overcurrent protection , And the output voltage has reached normal , It means that the power supply is normal .

5、 ... and 、 Install other modules and power on for test
Gradually install other modules , Every time a module is installed , Just power on and test , To avoid design error or component installation error , Cause overcurrent and burn out components .

The above is PCB Steps and methods of circuit board debugging , Have you got it all ？

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