Common failures of electronic circuits

To accurately determine the electronic circuit fault location, and then take effective measures to eliminate, first of all, have basic knowledge to cope with the causes of failure, only in this way can avoid the "blind man riding a blind horse", be targeted, symptomatic treatment, improve the work efficiency of electronic circuit troubleshooting. 

 

Electronic circuits work by themselves or external factors in the process of interference, easy to cause the various types of faults, the causes of these faults, complicated is multifarious, but nothing more than internal cause and external cause generalizing two forms, one by one, to introduce below. 

 

1. There are many internal causes of electronic circuit faults. First, electronic circuit long running resulting in failure of certain components or circuit performance aging easily happened, some of the common breakdown fault resistance change, transistor, capacitor leakage, etc.; Secondly, in the process of electronic circuit, some positions are broken, loose, bad contact, etc., which can lead to system failure. In the end, the maintenance personnel in the maintenance process, installed the electronic components that do not meet the specifications or the wrong line.