First, the 220V commercial power did not enter the mosquito killer circuit, and there was no voltage on the high-voltage power grid at this time. In this regard, you can first check whether the 220V mains electricity is normal. If it is normal, then check whether the power plug and socket are disconnected or have poor contact. If there is still no problem, you need to disassemble the mosquito killer for inspection, which is usually caused by loose solder joints of the power cord, and the fault can be eliminated after re-welding. A few may also be caused by internal open circuit of the power cord, which can be reconnected or replaced with a new one.
Second, the 220V commercial power has entered the mosquito killer circuit, and the voltage of the high-voltage power grid is normal, indicating that the fault is only in the ultraviolet cathode fluorescent lamp circuit. For the detachable mosquito killer shell, first check whether the lead between the lamp tube and the printed circuit board is welded or disconnected, and if so, reconnect it; If not, check whether the contact between the lamp tube and the lamp holder is good. If the contact is poor, you can tighten the lamp again. If there is no problem with the contact, it is that the lamp tube is broken. It is common for lamps to age and leak electricity after a long time of use. Generally, it is necessary to replace new lamps with the same specifications.
Precautions:
1, don't hold down the switch of the electric mosquito swatter all the time, and short the two electrodes with metal objects at the same time to make them emit continuous electric sparks. Because doing so will make the circuit bear a much larger load than usual, which is easy to cause circuit failure and damage the electric mosquito swatter.
2. Do not let the electric mosquito swatter enter the water, and use it in a humid or dusty environment for a long time. Because the electric mosquito swatter has a high voltage of 2000 volts, water or dust will make the insulation inside the circuit board worse or fail, resulting in high-voltage spark discharge, which leads to the failure of the electric mosquito swatter.
3. Always clean the net surface of the electric mosquito swatter to remove the residue of insect carcasses, otherwise it will seriously affect the use effect and make people mistakenly think that the electric mosquito swatter is broken.
4. The electric mosquito swatter should be charged in time (or the battery should be replaced) after use, especially the lithium battery, which is not resistant to over-discharge. Failure to charge in time after use is equivalent to over-discharge of the battery.