1. Unable to start the machine
A. The power supply of the scale is out of order when the scale can be powered on by connecting the battery and cannot be powered on only by connecting the adapter
B After startup, the buzzer has a normal prompt tone, but the LCD does not flash, which means that the flash is abnormal
C Check whether the battery is dead
2. Incorrect weighing
A. Observe whether the internal code value is stable, and whether there is conflict in each part of the sensor, Features of electronic weighbridge Whether the regulated power supply is stable, whether the operational amplifier circuit is normal, whether the circuit board of the A/D circuit has foreign matters, and whether the reaction resistance/capacitor/filter capacitor is poor or leaking.
B Check whether the output signal value of the sensor is within the standard.
C Use weights to check whether the four feet of the scale are evenly weighed.
D Please check the weight according to the instructions in the manual.
3 Poor flash
A. Connect the normal LCD pins in parallel with the repair scale LCD by hand, and then turn on the machine to check whether the normal LCD has the same bad condition. If not, it can be concluded that the LCD is bad.
B Check the CPU pins for oxidation, cold welding or short circuit.
C Whether there is oxidation, cold welding or short circuit between the LCD pin and the hole.
D Check the circuit between CPU and LCD for open circuit.
4. Abnormal movement and static
A There is no movement after starting the machine. The buzzer may be broken, but there are some Electronic weighbridge manufacturer In order to save power, the buzzer switch parameters have been set. You can check the manual to see if you accidentally entered the parameter setting and closed the buzzer. This is a common thing!
B. There is movement or stillness after starting the machine, but there are large or small movements or hoarseness, which is basically due to the poor buzzer of the electronic scale itself.
5. The key function is abnormal
A Assume that the electronic scale just has poor key contact or the key is difficult to press, Electronic weighbridge design Just change the button, Electronic weighbridge details If the key is still invalid after replacement, the CPU of the scale motherboard is poor and needs to be replaced.
B Please update the K/B inspection first. If the new K/B function is normal, it can be judged as K/B defective.
C Measure the circuit between K/B and CPU for open circuit and cold welding.
D Check whether the K/B foot rest has poor contact.
E Measure whether the diode on the K/B and CPU circuits is short circuited or open circuited
