Ultrasonic cleanerWhen a malfunction occurs and cannot be used normally, the following eight common situations are analyzed and detected:

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: Due to prolonged use and startup, the temperature may 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 break due to use, causing it to malfunction.

3、 Power tube damage:

Analysis: The power tubes on the motherboard may experience short circuits due to prolonged uninterrupted use 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、 Voltage regulator tube damaged

Analysis: The damage to the voltage regulator is generally caused by the low resistance or short circuit of the power transistor during startup, 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、 Damage to the bridge (diode rectifier circuit)

Analysis: Condition of the same voltage regulator

Detection: Also based on the characteristics of diodes (the bridge itself is composed of diodes)

6、 Damage to control board (adjustable)Ultrasonic cleaner）

Analysis: 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、 Damage to inductors and isolation transformers

Analysis: Due to prolonged operation of the machine, inductors and transformers are heat dissipation components that may melt, burn out, and cause short circuits due to high temperatures.

Detection: For damage to inductors and transformers, in most cases, visible signs of burning are visible, and new components should be replaced.

　　Ultrasonic cleanerDon't worry when a malfunction occurs, solve the problem based on the analysis and testing above.