Dear All,
These 15kHz ultrasonic generators are rather basic Chinese units (see pictures) used for welding nonwoven plastic (basically thin plastic fabric).
This Ultrasonic Generator become faulty, I have medium idea about electronics, but fail to repair it.
The Chinese manufacture did not give us any circuit diagram, so I made a full circuit diagram and exhibit here for reference.
After checking I found some power transistor (2SC3998) faulty on Lord amplifier then changed and found two diode on oscilation PCB then change. After that when I run the machine frequency not matching with ultrasonic transducer and nonwoven fabric soldering not possible.
If any one familiar with this system please give me the solution.
Thanks
Shahed
These 15kHz ultrasonic generators are rather basic Chinese units (see pictures) used for welding nonwoven plastic (basically thin plastic fabric).
This Ultrasonic Generator become faulty, I have medium idea about electronics, but fail to repair it.
The Chinese manufacture did not give us any circuit diagram, so I made a full circuit diagram and exhibit here for reference.
After checking I found some power transistor (2SC3998) faulty on Lord amplifier then changed and found two diode on oscilation PCB then change. After that when I run the machine frequency not matching with ultrasonic transducer and nonwoven fabric soldering not possible.
If any one familiar with this system please give me the solution.
Thanks
Shahed