Ultrasonic cleaner damage treatment

An ultrasonic cleaner is a liquid and solid contaminant that removes the working surface of the instrument to achieve a certain degree of cleanliness. Ultrasonic cleaners are damaged when they are used, which are generally caused by seven aspects. The following Xiaobian will introduce the causes and treatment methods of ultrasonic cleaner damage.

First, the transducer is damaged:

Analysis: May be due to a long time in the boot state, the temperature will gradually rise leading to colloid melting transducer off or ceramic fracture of the transducer.

Detection: Measure the dielectric strength of the transducer with a rocker. The insulation strength is below 200MΩ. The transducer must be replaced with a new one.

The internal ceramic of the transducer can also break due to long-term use, making it unable to work properly.

Second, the insurance damage: If you find no power display, no action, first look at the power seat insurance is damaged.

Analysis: It may be that the user's grounding wire is mixed with the live wire or the neutral wire. It is not grounded (this unit's ground wire is connected to the machine's enclosure). It may also be a short circuit of the machine. A short-circuit may occur due to the aging of the components, resulting in insurance damage.

Test: Take out the insurance watch, if there is any breakage, use a multimeter to measure if it is disconnected, and replace the new device.

Third, power tube damage:

Analysis: The power tube on the motherboard will cause short circuit in the power tube because the machine is used for a long time or the cleaning liquid is too little for a long time.

Detection: When the power tube is connected on the main board, use a multimeter to measure the resistance of the two sides of the power tube. Normally, the resistance should be about 22Ω. After the power tube is removed (disconnected from the motherboard), it is impractical to measure the individual pins.

Fourth, the analysis of the damage of the inductor and the isolation transformer: As the machine is working for a long time, the inductor and the transformer belong to the cooling element, which may itself be melted due to high temperature, burned, and cause a short circuit.

Detection: Inductor and transformer damage. In most cases, the traces of burnout can be seen visually. Replace the new device. Fifth, the damage of the bridge (diode rectifier circuit)

Analysis: Same as regulator status detection: same as diode characteristics (bridge itself is composed of diodes)

Sixth, control board damage (adjustable ultrasonic cleaner)

Analysis: The long-term continuous work, the aging of the components, and sometimes it will infiltrate the cleaning solution.

Detection: Disconnect the control board from the main board when the machine is not working. Power on the motherboard. If the machine is working, the control board is damaged and needs to be replaced.

Seventh, the analysis of the voltage regulator tube damage: The voltage regulator tube damage is generally after the resistance value of the power tube is small or short-circuited, caused by the boot, and itself is rarely damaged.

Detection: According to the diode characteristics, forward conduction, reverse end. Measured with a multimeter diode, forward resistance of about 70Ω, reverse ∞. If the value deviation is too large or the forward resistance is ∞, replace the new regulator.