Fault one, can not be turned on.
Treatment: The first step should be to check whether the power supply is connected, in fact, many customers did not connect the power supply, you think the machine does not work, can not be turned on, according to our statistics, more than 60% of the problem is not turned on the power supply is not connected. Check the power supply is very simple, you can take other appliances plugged into the original jack to see if it works, if not, it is indeed not connected to the power supply.
Fault two, the power indicator does not light up.
Treatment: Some machines are used for a period of time, suddenly do not work, the power indicator is not lit, after the exclusion of the power supply, if the light is still not lit, you can pull out the machine’s insurance to see, or directly replace a. Enough to most models of ultrasonic cleaning machine with a spare insurance, drop to change over is. Note: This operation should be carried out after the power is disconnected.
Fault three, no vibration.
Treatment: the machine is plugged into the power supply, can be turned on, the light can light, but the cleaning tank liquid no signs of vibration. If the mechanical control, you can check the control of ultrasonic knob switch is open or have tuned to the time bit. CNC ultrasonic cleaning machine to check whether there is pressed at the beginning, timing is set up. The two items are ruled out, then you can determine the internal components of the machine problems, can be sent to the factory for repair.
Fault four, no ultrasound, power switch indicator does not show, the fan runs normally: ①, check whether the rectifier bridge
①, check whether the rectifier bridge is damaged. The method is: the pointer multimeter to × 10k block, the black pen connected to the rectifier bridge positive, the red pen is connected to the ac end of the two pins are on, is the next step to check.
②, check whether the main capacitor is damaged, is to replace the battery.
③, check whether the power tube is damaged. The method is: the pointer universal meter to × 10k block, the black meter pen connected to the power tube 2 pins, the red meter pen is connected to 1, 3 pins are on, is to replace the power tube.
Fault five, no ultrasound, power switch indicator light, fan operation is normal.
① remove the output cable, turn on the power supply, the power to the maximum, with a multimeter AC 1000v gear, measure the voltage at the output, generally about 1000v, if there is voltage that the generator is not a problem, plug the output cable, check the ⑤ step, if there is no voltage, check the next step.
② use a multimeter DC 1000v block, measure the main capacitor or rectifier bridge output positive and negative terminals, whether there is about 300v, no voltage then check the ④ step, there is voltage check the next step.
③ with a multimeter AC 20v block to measure the d1 frequency measurement diode should be about 10v, if there is no voltage, replace the IC1 module.
④ check the power control part, measure whether the power adjustment potentiometer is short-circuited, is replaced. Otherwise, check the power, control the output resistance r3 should be 240 ohms, 5w resistor is damaged, is the replacement of the resistor.
⑤ check whether the ultrasonic shock is normal, available megohmmeter to measure the insulation resistance of both ends of the shock, generally more than 500k or use the multimeter x10k block to measure the resistance of both ends of the shock, the general meter needle will have a small swing and return to the original position, switch the meter pen will have the same effect, if the resistance is small may be the shock problem, short-circuit after moisture.
Fault six, there is an ultrasound, but the power can not be adjusted.
1, check whether the thyristor is short-circuited, is replaced, otherwise check the next step.
2, check whether the triode t5 is damaged, is replaced.
Fault seven, the ultrasound intensity becomes weak.
1, use the frequency table to measure whether the host is within the normal frequency range, generally 28k of the vibrator bit 27-31k, 40k of the vibrator for 39-41k. If the difference is too large, the same can be restored by adjusting the frequency adjustment potentiometer on the motherboard.
2, observe the current size of the ammeter, if the current is too small than the rated current, the first thing you should check whether the ultrasonic shock plate is damaged, such as the shock off, shock chip rupture, bonding glue cracking, etc., whether the connecting wires have a short circuit.
3, in general, if the current does not drop much or basically no drop, and the sound is normal, but the ultrasonic strength drop is more powerful, it is likely that the shock bonding glue cracking, the judgment method is: observe the shock and steel connection glue coating, under normal circumstances should be smooth surface, such as a small crack is likely to be the glue has cracked, at this time should be removed from the shock re-bonding, such as current If the current drops a lot, the main check is whether there is a broken connection wire or shock wafer crack.