Mining machine giant dragon switch voltage regulator is not resp

1. It's easy to repair. As long as you can understand the principles and understand the fundamentals of electronics, you can basically repair it. If you don't have an electronic foundation, I won't tell you.

2. Check the feedback circuit, this kind of switching power supply sometimes need to add load to have output, I don't know how you test.

3. Unknown_Error

4. This is the switching power supply is not working. Need to follow the circuit diagram to find bad parts.

5. Check the contact between the power cord and the host. It is recommended to unplug the power cord again. If the power cord is normal, check the socket for power. If it is normal, the power supply of the host is broken ~!

6. The motherboard's Beiqiao chip is burned. Although I don't want to say it, it's true. It means that unless it's returned to the factory for maintenance, the general maintenance point can't handle this kind of problem.

7. This is a multifaceted problem
1. First check whether the electrical circuit diagram is correct. From the problem you described, the contactor is good, mainly because the self-locking contact on the contactor is connected in front of the stop button, so the contactor can't stop when it moves together
2. Check if the contactor is connected with large capacitors
3. If there is no problem above, it is the problem of the contactor. If the contactor is powered on directly, if the power is cut off, it is the problem of the contactor itself. Ask the contactor manufacturer. Just replace the contactor
4. The contactor is burnt out. Replace the contactor. There are many kinds of burnt contactors, such as burnt contacts, burnt supports, etc. The reason is that the capacity of contactor is too small.

8. It depends on the control chip you use. If you use the 3842 mole, check whether the 7-pin voltage is normal, whether the 3-pin voltage is more than 1V, and whether the 7-pin voltage is about 16V. If the 3842 is low, it will not work, if the 3-pin voltage is more than 1V, it will not vibrate, whether the switch tube is damaged, and whether the resistance from the switch tube to the negative pole is damaged. Whether the rectifier voltage is normal or not.

9. First of all, check whether the power supply is connected (whether there is a problem with the power supply), and then check whether the switch of the percussion drill is turned on. If there is no problem with both items, the percussion drill has a problem and needs to be repaired.