Ultrasonic cleaning machine is a highly clean cleaning tool that is used in industrial production, commerce, scientific research, and daily life. When the ultrasonic cleaning machine malfunctions and cannot be used normally, the following seven situations are generally common. Jining Tianhua Ultrasonic Electronic Instrument Co., Ltd. will analyze and test these seven situations.
1、 Insurance damage: If there is no power display or action after turning on the power, first check if the insurance inside the power socket is damaged. Analysis: It is possible that the user's grounding wire is mixed with the live or neutral wire and not grounded (the local grounding wire is connected to the machine casing), or it is possible that the machine is short circuited due to aging components, resulting in damage to the fuse. Testing: Take out the insurance and check for any breakage. Use a multimeter to measure whether it is disconnected in the on/off mode, and replace it with a new device.
2、 Damage to the transducer: Analysis: It is possible that due to prolonged use of the device, the temperature will gradually rise, causing the colloid to melt and the transducer to detach or the ceramic part of the transducer to break. Testing: Use a shaking table to measure the insulation strength of the transducer. If the insulation strength is below 200m Ω, it cannot be used and a new transducer needs to be replaced. The internal ceramic of the transducer may also fracture due to long-term use, making it unable to function properly.
3、 Power tube damage: Analysis: The power tubes on the motherboard may experience short circuits due to prolonged uninterrupted use of the machine or insufficient cleaning fluid. Testing: When the power transistor is connected to the motherboard, use a multimeter to measure the resistance of the pins on both sides of the power transistor. Under normal circumstances, it should be around 22 Ω. After removing the power transistor (disconnecting it from the motherboard), measure that there should be no connection between its pins.
4、 Damage analysis of voltage regulator: The damage of voltage regulator is generally caused by low resistance or short circuit of power transistor, and it is rarely damaged. Detection: According to the characteristics of the diode, it conducts in the forward direction and stops in the reverse direction. Measure with a multimeter in diode mode, with a forward resistance of around 70 Ω and a reverse resistance of ∞. If the numerical deviation is too large or the forward resistance is also ∞, replace the voltage regulator with a new one.
5、 Bridge damage (diode rectifier circuit) analysis: same as voltage regulator condition detection: also based on diode characteristics (the bridge itself is composed of diodes)
6、 Analysis of damage to the control board (adjustable ultrasonic cleaner): Prolonged continuous operation is related to component aging, as well as occasional infiltration of cleaning solution. Detection: Disconnect the control board from the motherboard when the machine is not working. If the motherboard is powered on and the machine is working, it indicates that the control board is damaged and needs to be replaced.
7、 Analysis of damage to inductors and isolation transformers: Due to long-term operation of the machine, inductors and transformers are heat dissipation components that may melt and burn out due to high temperatures, causing short circuits. Detection: For damage to inductors and transformers, in most cases, visible signs of burning are visible, and new components should be replaced.
The above analysis and testing of ultrasonic cleaning machine faults are based on the TH series ultrasonic cleaning machine of Jining Tianhua Ultrasonic Electronic Instrument Co., Ltd. For more information on ultrasonic cleaning machine products and technical knowledge, please call Jining Tianhua Ultrasonic Electronic Instrument Co., Ltd. Our company supplies ultrasonic cleaning machines and can also customize non-standard ultrasonic cleaning equipment.