Common faults and maintenance methods:
1. After the power is turned on, the rotary blade does not rotate or reciprocate.
(1) The battery voltage is too low: the voltage can be measured with a multimeter in the DC voltage range; You can also connect 1.5V ~ 2.5V small beads in parallel, and judge the voltage level according to their brightness. If the voltage is low, the dry battery should be replaced, and if the rechargeable battery is used, it should be charged in time.
(2) For shavers using AC power supply, the plug is not in good contact with the socket or the power cord is broken: it should be plugged in again, and the plug should be repaired in time if it is faulty.
(3) Oxidative wear and poor contact of power switch contacts: clean the contacts with anhydrous alcohol; A layer of solder can be welded instead.
(4) Poor contact between the battery clip and the battery: As the spring of the battery clip is corroded by battery leakage, resulting in poor contact, the accumulated dirt can be removed by sandpaper polishing. If it is caused by insufficient spring force, a piece of metal can be padded at the bottom of the battery to make it contact well.
(5) The mesh cover is deformed and the moving blades are stuck: nonmetallic materials (such as cloth balls, thread balls, sandbags, etc.). ) similar to the inner surface of the net cover can be found, and it can be glued to the inner surface of the net cover and squeezed to restore the original geometric shape. If the net cover is broken, it should be replaced with a new one.
(6) The carbon brush of the motor is seriously worn or falls off: replace, grind or reinstall the carbon brush.
(7) Fracture of motor rotor: send it to a professional repair shop for repair.
2. The moving blade rotates abnormally or slowly, resulting in poor shaving effect.
(1) The power supply voltage is too low, or the dry battery will be exhausted, or the rechargeable battery will be insufficiently charged. If AC power supply is used, it can be used after the voltage is normal; Dry batteries need to be replaced with new batteries after a long time of use; Rechargeable batteries should be charged.
(2) The cutting edge of the moving blade becomes dull: the moving blade should be sharpened or replaced.
(3) The blade is stuck by foreign matter: remove the blade and the rotating shaft to remove the foreign matter.
(4) The motor bearing is short of oil or seriously worn: a small amount of lubricating oil (white oil) can be added or the bearing with the same specification can be replaced.
(5) The carbon brush is badly worn, and the dirt contact of commutator is poor, which leads to the decrease of motor speed. Repair or replace the carbon brush. Clean the commutator with anhydrous alcohol.
(6) Short circuit of rotor coil: After inspection, send it to a professional repair shop for repair.
3, loud noise, accompanied by vibration
(1) The motor bearing is short of oil or seriously worn. Lubricating oil can be added or bearings can be replaced.
(2) The motor spindle is bent and deformed, resulting in friction between rotor and stator. The spindle should be reshaped or the rotor should be replaced.
(3) The clearance between the net cover and the movable blade is too large, and the movable blade moves up and down when rotating: the adjusting screw in the center of the movable blade disc can be adjusted to increase the pressure of the spring leaf, or the net cover can be further tightened.
The charging indicator light is on, but it can't be charged.
(1) The rectifier diode is damaged. The diode should be replaced.
(2) The current limiting resistor is open. The current limiting resistor should be replaced.
(3) The rechargeable battery is faulty. Rechargeable batteries should be replaced.
Tips:
The net cover of the electric shaver is very thin, so don't use too much force to avoid deformation of the net cover. If the electric shaver is stuck or can't rotate during use, don't use it reluctantly, but stop using it immediately and turn off the power. Unscrew the net cover, remove shavings, remove the rotating blade, and gently rotate the motor shaft by hand. If the rotation is flexible, turn on the power supply and observe the rotation of the motor. If it is normal, you can continue to use it. If it is not normal, find out the reason.