Fault analysis of ultrasonic cleaner

1. Damaged transducer:

Analysis: It is possible that due to prolonged use on the machine, the temperature will gradually rise, causing the gel to melt and the transducer to fall off or the ceramic part of the transducer to break.

Detection: Measure the insulation strength of the transducer using a shake table. If the insulation strength is below 200M Ω, it is no longer usable and a new transducer needs to be replaced. The internal ceramic of the transducer may also break due to long-term use, making it unable to function properly.

2. Insurance damage:

If there is no power display or action after starting up, first check if the fuse 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 grounding wire of the machine is connected to the machine casing), or there may be a short circuit in the machine or aging of components, resulting in damage to the fuse.

Detection: Take out the insurance and observe if there is any breakage. Use a multimeter to measure whether it is disconnected and replace it with a new component.

3. Power tube damage:

Analysis: The power transistor on the motherboard may experience short circuits due to prolonged uninterrupted use of the machine or insufficient cleaning liquid.

Detection: When the power transistor is connected to the motherboard, use a multimeter to measure the resistance value of the pins on both sides of the power transistor. Under normal circumstances, it should be around 22 Ω. After removing the power transistor (disconnected from the motherboard), measure that there should be no connection between its various pins.