Electronic scales are more common in the supermarket industry and are also one of the accessories for supermarket cash registers. With these two machines, the supermarket can be more efficient, precise and convenient in the process of cash register. The electronic scale is mainly composed of a load cell, an amplifying circuit, an AD conversion circuit, a single chip circuit, a communication interface circuit and a voltage stabilizing circuit. For ordinary users, the internal structure of the electronic scale is extremely complicated, and the problem is often overwhelmed. For example, how should the electronic scale suddenly crash? Xiaobian introduces some simple processing methods.
(1) Check if the 220V power supply is normal;
(2) Whether the voltage regulator circuits inside the electronic scale are normal;
(3) Check if the power supply voltage of the printer is normal, and whether the current is too large when printing;
(4) Focus on checking whether the voltage of the AD circuit is normal and stable, otherwise check if the sensor is normal.
(5) Check whether the power supply of the circuit board digital circuit is normal, and focus on checking the crystal oscillator components, which may be damp or damaged.
(6) Electronic scales often crash, mainly checking the capacitive components on the circuit board, whether the capacity is reduced or leakage.
(7) After the electronic scale is turned on, the digital instability or hop count is displayed, which belongs to the AD circuit or the sensor is bad. It is important to check that the voltage of this part must be stable and normal.
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