Hair dryer for damaged hair.Negative ion electric hair dryer maintenance disassembly, heating does not work fault

　　Negative ion electric hair dryer maintenance disassembly, heating does not work fault

　　1, fault phenomenon: plug in, electric hair dryer heat, fan switch I gear no wind, ll gear no wind, hair dryer motor does not turn at all.

　　2. Disassembly: Remove the two screws on the handle of the hair dryer with the Y-type screwdriver; Remove the air volume regulating cover of the air inlet of the electric hair dryer; Remove the screws on the filter cover of the inner layer of the air inlet; Pry open the hair dryer shell slightly; Pry open the sliding switch decoration ring; Continue prying the hair dryer case until the two cases come off. This shell disassembly is still somewhat difficult, because I do not know where the buckle point is, too much force and afraid of damaging the shell, so I can only feel the disassembly!

　　3, check: After opening the shell, you can see that there are two sliding switches in the hair dryer, a key switch, a thin film safety capacitor, and one has not seen is the negative ion generator.

　　No anomalies in sight. Keep moving! Pull out the mica jacket, the most striking is the electric heating wire wrapped in the mica bracket, the mica bracket can be drawn from the base that fixed it, you can see the rectifier bridge composed of four diodes is to power the DC motor, from the appearance, there is no broken line found. Using a multimeter to detect the input terminals and output terminals of the rectifier bridge, the pointer swing is large, and it is suspected that the rectifier diode breakdown. On second thought, the output end of the rectifier bridge is connected to the DC motor, and this test result can neither judge the problem of the rectifier bridge nor rule out that it has a problem.

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