The ultrasonic cleaning machine not only has its own cleaning function, but also has many functions, such as extraction, emulsification, accelerated dissolution, crushing, dispersion and so on. It is widely used in the manufacturing, maintenance and cleaning of machinery, electronics, plastics, instruments, medicine, packaging, military industry, aerospace and other industries; cleaning of suction pipes, suction nozzles and appliances of experimental materials, degassing before chromatography, cleaning of medical devices, medical materials and appliances; cleaning of jewelry, jewelry, precious metals, glasses, etc. If each part of the ultrasonic cleaning machine is damaged, how to repair it? Now let's take a look at it one by one!
1. Insurance damage:
If there is no power display or operation after power on, the first thing to see is whether the fuse in the power socket is burnt out.
Analysis: it may be that the user's ground wire and live wire or neutral wire have no ground (the ground wire of this machine is connected to the machine shell), or it may be that the machine is short circuited, and the components are aging and short circuited, resulting in the loss of insurance.
Suggested inspection: take out the safety watch and check whether it is damaged. Use the switch gear of the multimeter to check whether it is damaged. If it is damaged, replace it with new equipment.
2. Sensor damage:
Equipment analysis: sometimes, due to the long-term use of the machine, the temperature gradually rises, resulting in the melting of the colloid, the falling off of the transducer or the fracture of the ceramic part of the transducer.
Recommended inspection: use the instrument to measure the insulation strength of the sensor. If the insulation strength is less than 200 Ω, a new sensor should be replaced.
The ceramic inside the transducer will also be damaged due to long-term use, affecting the normal work.
3. The power tube is damaged
Analysis: due to the continuous use of the machine for a long time, the power tube on the motherboard will be short circuited.
Recommended test: when the power tube is connected to the motherboard, use a multimeter to measure the resistance of the pin on both sides of the power tube, which should be about 22 Ω under normal conditions. After the power tube is removed (disconnected from the motherboard), it should not be connected between pins.
4. The regulating pipe is damaged
Analysis: the damage of voltage regulator is usually due to the small resistance value of power tube or the startup after short circuit, which rarely damages.
Recommended test: according to diode characteristics, forward conduction and reverse cutoff. With the diode device of the multimeter, the forward resistance is about 70 Ω and the reverse resistance is ∞. When the value deviation is too large or the positive resistance is ∞, a new regulator should be replaced.
5. Bridge loss (diode rectifier circuit)
Analysis: same as regulation condition
Recommended test: it can also be tested according to the diode characteristics and methods (the bridge itself is composed of diodes)
6. The control board is damaged (adjustable ultrasonic cleaner)
Analysis: long term uninterrupted work, as well as parts aging, the penetration of cleaning fluid may also cause damage. Recommended inspection: shut down, disconnect the control board and main board. The power supply on the motherboard. If the machine starts to work, the control board will be damaged. Please replace it.
7. The inductance and isolation transformer are damaged
Analysis: due to the long working time of the machine, the inductor and transformer are heat dissipation components, and the high temperature will melt and burn out, resulting in short circuit.
Recommended inspection: most of the damaged inductors and transformers can see the burning marks directly. Replace the parts immediately.