① "Mini Air Cooling Fan" direct damage, the judgment method for measuring motor windings with a multimeter X10 master file, the secondary winding (secondary winding is connected to the capacitor on the two yellow and black lines, red, white and blue primary winding for governor three), measure seer, a pen then yellow line when another branch red and blue, respectively, then the primary winding, the resistance is generally 400 - 600 ohm
   ② "Mini Air Cooling Fan" motor oil dry out and die, there is buzz when turned on, struck with a screwdriver blade, motor card refuses flexible
   Workaround: open the motor bearings and clean around the bearing hole, then the right amount of oil (oil), be careful not to rub with sandpaper motor bearings installed at one time, when not tighten the screws with a screwdriver around, banging motor Tighten adjusting screw shell before it, after the motor bearing flexible
   ③ "Mini Air Cooling Fan" motor capacitor damage, start slowly or does not start, there is buzz, poke can start
   Solution: Disconnect the cable capacitance, measured capacitance with X10K file, returning a pointer deflection after 1/4, otherwise capacitor damage (Box Fan 1 or 1.2μF, table fan 1.5μF)