As is known to all, the use of any machine has certain limits. The ultrasonic cleaner will also have various minor problems after being used for a certain period of time. Now let's take a look together at what common minor problems there are and how to solve them. Even without the ultrasonic generator, the working indicator of the cooling fan is still on. The problems are: Check if there is a frequency output on the generator driver board, or disconnect the oscillator output line and measure the output terminal of the generator (the input terminals of the output transformer) with a multimeter. Take the voltage range AC750V and set the external potentiometer to the maximum to see if there is a voltage of 180~240V. If there is a voltage of 180~240V, check if the oscillator is short-circuited. Then use the multimeter to conduct. Measure whether it is conducting. If it is conducting, check whether the oscillator wire is broken and whether the two wires are connected together or if the oscillator is short-circuited. 2. No ultrasound, no output. The problems are. If the generator indicator light is on and the fan is rotating, there will be a frequency display. There is no output. Check if the thyristor is broken. If not, check if the thyristor control part is normal. Also, see if the generator driver board 7812 has a 12V regulated output. If so, check whether there is a problem with the 772 in the thyristor control part of the starter board. If so, replace it. 3. If there is no ultrasonic wave and no output, turn on the cooling fan of the ultrasonic generator to rotate. The problems are as follows: Check whether the power tubes of the generator are burned out. If the power tubes are burned out, observe whether the fuses on the power board of the generator have blown or exploded. If it burns out, replace the power transistor and fuse. Resistance. Ultrasonic cleaning machine maintenance 4. The power of the ultrasonic generator cannot be adjusted when it is working normally. The problem is: To check if there is a problem with the thyristor, use the conduction range of a multimeter to measure whether there is a short circuit in the three pins of the thyristor. The most important thing is to check if the two thickest pins of the thyristor are conducting. If they are conducting in reverse, then replace them. 5. There is ultrasound, but the ultrasound sound is very abnormal and the ultrasound intensity is not good. Use a frequency table to check if the output frequency is within the operating frequency range of the transducer (Note: For a 28KHZ transducer, it should be between 27KHZ and 31KHZ, and for a 40KHZ transducer, it should be between 38KHZ and 42KHZ). If the difference is too large, the normal working frequency can be restored by adjusting the frequency potentiometer. Ultrasonic cleaning machine maintenance. 6. The circuit breaker of the ultrasonic generator cannot be activated and trips as soon as it is turned on. The problems are as follows: Check if there is a short circuit in the power line of the generator, check if there is a problem with the rectifier bridge of the generator, measure if there is a short circuit in the four pins. If there is a short circuit, just replace the rectifier bridge if there is a problem. I believe everyone has experienced that for these minor issues, sometimes it can be even more troublesome to have them repaired by professionals. Here are several common solutions to minor malfunctions of the ultrasonic cleaner, hoping to be helpful to you.
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