There are several kinds of common instruments commonly used fault analysis method?

Current speed under the stage of development of science and technology, people no matter what will require a standard, instrument and meter is a benchmark of the measuring device, such as common bimetallic thermometer is the most commonly used instrument, as we all know, the more complex the likelihood of a system failure occurs, thus instrumentation failure often appear in the electronic circuit. Here are the commonly used fault diagnosis method for your reference in the work. 1, the hitting hand pressure often encounter the phenomenon of instrument operation and downs, this phenomenon is mostly caused by poor contact or virtual welding. In this case with hand pressure can be used. The so-called & other; Percussion & throughout; Is on the part of the fault may be produced by small rubber ð ¨ +  head or other tap tap the board or components, see if it will cause error or downtime The so-called & other; Hand pressure & throughout; Is when failure occurs, turn off the power to connect components and plug and seat back pressed firmly with the hand, it will try to eliminate the fault. Tapping the chassis is normal, if found again knock again not normal, it's best to put all joint stuck to try again, ever if you don't succeed, had to want to other measures. 2, observational method using visual, smell and touch. To some, the damaged element will change color, blister or charred spots; The smell of burning device will produce some special; Short circuit of the chip will be hot; With the naked eye can observe virtual soldering or desoldering. So-called method is through some board inside the machine, pull device method to determine the cause of the problem. When removing a card or device instrument returned to normal, after failure there. 4, replace law requires two same instrument or have enough spare parts. Will be a good spare parts with the same components of fault on board to replace, the fault is eliminated. Hope the above fault diagnosis methods can bring help in the work!