Judgement of common failures of ultrasonic cleaner

When the ultrasonic cleaner fails and cannot be used normally, the following eight situations are generally common. For these eight situations, analysis and detection are carried out:

1. Insurance damage: If no power display and no action are found after the power is turned on, it is first necessary to see whether the insurance in the power supply seat is damaged.

Analysis: It is possible that the user's ground wire is mixed with the live wire or the neutral wire, and it is not grounded (the ground wire of the machine is connected to the machine shell), or the machine is short-circuited, and the components are aging to cause a short-circuit phenomenon, resulting in insurance damage.

Detection: Take out the insurance to see if there is any breakage. Use a multimeter to check whether the switch is disconnected and replace it with a new device.

Second, the transducer is damaged:

Analysis: The temperature may gradually rise due to long-term use in the power-on state, causing the melted transducer to fall off or the ceramic part of the transducer to break.

Detection: measure the insulation strength of the transducer with a shaker. The insulation strength below 200MÎ© is no longer usable, and a new transducer must be replaced. The internal ceramic of the transducer will also break due to long-term use, making it unable to work properly.

Third, the power tube is damaged:

Analysis: The power tube on the motherboard will be used for a long time because of the uninterrupted use of the machine for a long time or the cleaning liquid is too little to use for a long time, so that the power tube is short-circuited.

Detection: 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. Normally, it should be around 22Î©. After removing the power tube (disconnected from the motherboard), the measurement of each pin should be unconnected.

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