Teach you how to check if the electronic scale circuit is faulty

2023-06-01 22:09:31
Whether the electronic scale circuit fault detection method is correct or not in the maintenance work is very important to quickly and accurately determine the location of the fault and repair it. On the basis of familiarity with the operation and structural principle of the price scale, the maintenance personnel of the electronic scale must also be able to use the measuring instrument correctly and master the basic repair methods of the electronic scale. Here are a few common troubleshooting methods:
Intuitive method
There are many components on the main circuit board of the electronic scale, and many faults occur due to short circuit, open circuit, poor contact and plugging, and the corners of the component tube are open. Therefore, when the electronic scale fails, the board should first be inspected with an intuitive feeling: visual, listening, smelling, touching, etc.
2. Comparison, alternative method
When the fault is checked, the electronic scale is compared with the faulty scale by means of the meter, and the fault point can be detected quickly. In addition, sensors, circuit boards, power supplies, keyboards, etc., which are prepared at work, are suspected to be damaged by sensors, circuit boards, power supplies, keyboards, etc., replaced with spare parts, and then observe whether the results have changed. Normal, it indicates that there is a problem with the original component. Comparison and substitution methods can quickly and accurately determine the point of failure.
3. Voltage measurement method
The electronic scale compares the working voltage of the circuit components and the individual tube corners with the normal value, and the place where the voltage changes greatly is where the fault is.
4. Short circuit and open circuit method
The short circuit method is to short-circuit a part of the circuit, and the electronic scale then judges the fault point by the result of the oscilloscope or multimeter test. The open circuit method is to disconnect a certain part of the circuit, and then use a multimeter to measure the resistance, voltage or current to judge the fault point.

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