What about the damage to the power tube of the ultrasonic cleaner?
When the power tube is connected on the main board, the resistance value of both sides of the power tube can be measured by a multimeter. Under normal conditions, it should be around 22 ohms
The power board on the main board will cause the short circuit of the power tube because the machine has not been used continuously for a long time or has too little cleaning liquid for a long time
After taking off the power tube (disconnected from the main board), it should be impossible to measure the pins between the pins.
