The ultrasonic wave propagates in the liquid, so that the liquid and the cleaning tank vibrate together at the ultrasonic frequency, the liquid and the cleaning tank vibrate at their own natural frequency, this vibration frequency is the sonic frequency, so people hear the buzz. With the continuous development of the cleaning industry, more and more industries and enterprises have used ultrasonic cleaning machines. The advantages of ultrasonic cleaning machine are: ultrasonic cleaning effect is good, simple operation. The sound that people hear is an acoustic signal with a frequency of 20-20000Hz, and the sound wave higher than 20000Hz is called ultrasonic wave. The transmission of the sound wave propagates longitudewise according to the sine curve, producing a large number of small bubbles. One reason is that the local tensile stress in the liquid and the formation of negative pressure, the reduction of pressure makes the gas originally dissolved in the liquid supersaturated, and escape from the liquid, become a small bubble; Another reason is that strong tensile stresses "rip" the liquid into a void, called cavitation. The ultrasonic cleaning machine used for too long will also have some small problems, if the user can not solve it in time, it will cause a greater failure.
View the switch panel, many users in the process of using ultrasonic cleaning machine, will face the problem of control panel failure. In this regard, do not feel worried, may be due to its long running, internal components aging or internal cleaning fluid infiltration caused by. In the face of such situations, you can disconnect the power supply first, and then disconnect the connection between the motherboard and the control board, and power on the motherboard, if there is no abnormality, the control board should be replaced in time. Check the insurance status, the number of ultrasonic cleaning machine, after starting neither power display, nor any action. In the face of such a situation, the customer can first observe the overall instrument, if there is a smell in the machine, it may be caused by short circuit caused by damage to the components of the instrument, and most of these conditions can be intuitively seen, timely replacement of the components. Of course, there may be due to the instrument is not grounded caused by the fuse burning, the user can see the fuse that if there is a break should be replaced immediately.

1. Insurance damage
If there is no power display and no action after starting up, we must first see whether the insurance in the power supply seat is damaged.
Analysis and judgment: It may be that the user grounding wire is mixed with the live wire or the neutral wire, and there is no grounding (the ground wire of the machine is connected to the machine shell), and it may be the machine short circuit, and the short-circuit phenomenon of the aging components leads to insurance damage.
Detection and solution: Take out the fuse to see if it is broken, use a multimeter to measure whether it is broken, and replace the new device.
2. The transducer is damaged
Analysis and judgment: Possibly due to a long time in the boot use state, the temperature will gradually rise, resulting in alternating melting of the ceramic to fall off or the ceramic to break.
Detection and solution: Use a dial to measure the insulation strength of the phone, the insulation strength is less than 200M, can not be used, must be replaced with a new transducer. Because the internal ceramics of the transducer will also be broken due to long-term use and cannot work normally.
3. The power tube is damaged
Analysis and judgment: The power tube on the main board will be short-circuited because the machine will be used uninterrupted for a long time, or the cleaning liquid will be used too little for a long time.
Detection and solution: When the power tube is connected on the main board, use a multimeter to measure the resistance of the pins on both sides of the power tube. Under normal circumstances, the resistance value should be about 22. After taking down the power tube (disconnected from the main board), the measurement between the pins should be blocked.
4. The voltage regulator is damaged
Analysis and judgment: The damage of the voltage regulator tube is generally caused by startup after the resistance value of the power tube is small or short circuit, and it is rarely damaged.
Detection and solution: According to the characteristics of the diode, the forward guide is on, the reverse end is on. Measured with a multimeter diode, the forward resistance is about 70, and the reverse ∞. If the numerical deviation is too large or the positive resistance value is also ∞, replace the new voltage regulator.
5. Bridge damage (diode rectifier circuit)
Analysis and judgment: the condition of the same voltage regulator
Detection and solution: Also according to the diode characteristics (the bridge itself is composed of diodes),
6. Damage to the control board (adjustable ultrasonic cleaning machine)
Analysis and judgment: long-term continuous work, aging of components, or sometimes infiltration of cleaning fluid.
Detection and solution: When the machine is not working, disconnect the connection between the control board and the main board, the main board is powered on, such as the machine works, it means that the control board is damaged and needs to be replaced.
7. Damage of inductance and isolation transformer
Analysis and judgment: Because the machine works for a long time, the inductor and transformer are heat dissipating components, which may melt and burn due to high temperature, resulting in short circuit.
Detection and solution: the damage of inductors and transformers, in most cases, the trace of burning can be seen intuitively, and the replacement of new devices.