Charger fan repair: problem switch repair.

How are you all? I hope everyone is well and healthy by the grace of God. Today I will show you how to repair a charger fan.

A few days ago, a charger fan came to me, and the customer claimed that this charger fan is fine, the power is fine, and the charging is fine, but the DC and AC switches were not working. So today we will open this fan and see if the switch inside is damaged or if there is a problem with the battery line or any other problem, so let's open the fan now.

First, I took off the black plastic cover at the back and checked the power supply and battery charging line and battery with a digital multimeter and found no problem. Then I opened the controlling circuit and prepared to check if there is any problem with the switch inside it.

I used a kind of swimming oil which is used as coconut oil in Bangladesh, but it is much better than original coconut because coconut oil freezes and becomes hard in winter, so I used such a mixture of oil which is the same in winter and summer so it will not affect the switch. And the switch will always be good, and no carbon will accumulate.

After putting oil inside the switch and moving it for a long time, my switch connection was fixed, and there was no problem in the circuit, so I did not change the switch, and you can see in the video that the switch is working very well.

Our Bangladeshi market price of a switch is 20 taka. By buying and installing this switch, I earn 200 taka to 150 taka as wages since I did not have to install the switch and did not have to go to the market to buy my switch, so I will take 100 taka as wages from this fan.