How to check the cause of the failure of the furniture tester

Abstract: The maintenance of furniture testers is an indispensable part of the electronic market, and companies that sell such instruments and equipment can only make those unqualified products enter the market with good testing technology. in. Therefore, it is necessary to have a sufficiently solid foundation of electronic expertise for the technical staff of instrumentation, and more extensive field experience is required.　　 We often encounter the phenomenon of ups and downs when the furniture tester is running. In fact, most of this phenomenon is caused by poor contact or false welding. What methods do we have to check the malfunction of the instrument? Here are three practical methods.　　1. Methods of observation　　We can observe by smell, sight and touch. In some cases, the damaged components will be discolored and blistered or scorched spots will appear, and some components that have been burned will produce some special smells. The short-circuited chip will be a little hot, and we can also observe the false soldering and desoldering with the naked eye. 2. Knock and hand pressure. In fact, the 'knock' mentioned here refers to the place where a fault may have occurred, using a small rubber finger or other knocking objects to gently hit the plug-in board and components, and then See if it will cause errors or downtime. The 'hand pressing' mentioned here means that when a fault occurs, turn off the power and then re-press the inserted parts and plugs by hand, and then try to turn it on again to see if the fault has been eliminated. If you find that tapping the case is normal, and then tapping it again is not normal, then first re-plug all the connectors and try again. If it still fails, then you have to find another way.　　 Third, the troubleshooting method 　　 In fact, the elimination method is mainly to determine the cause of the furniture tester's failure by unplugging some plug-in boards and devices in the plug-in machine. When some plug-in boards or components are removed, the meter returns to normal, which means that the fault occurred there.　　Related reading: The development of the furniture tester industry is restricted by the objective environment

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