1. Repair of medium woofer: most of the speaker voice coil skeletons are made of aluminum alloy foil. First, heat the voice coil with a hair dryer until the glue softens.Then, use a surgical blade to separate the voice coil from the paper basin along the outer edge of the voice coil.

With Nylon king plastic or aluminum alloy cylinder car and voice coil diameter as large cylinder, and drill 12mm hole in the middle of the cylinder as a die (can also be used to replace several rolls of waste film), the voice coil aluminum foil set on the die, pay attention to voice coil skeleton can not be connected end to end to form a closed loop, leaving 0.8mm gap.

Voice coil winding: use enameled wire with the same diameter as the original voice coil. First, glue the end of the wire to the voice coil skeleton with 502 glue, and wind it in two layers, glue each layer (be careful not to glue the aluminum foil to the tread). After winding, blow dry with hair dryer.

Voice coil installation: the upper and lower position of the voice coil should be in line with or slightly higher than the core section of the magnet. The upper and lower positioning and the center positioning can be cut into narrow strips and inserted between the voice coil and the iron core. After positioning, apply AB glue and make micro adjustment after half an hour. When the glue is dry, remove the positioning plug and the speaker will be repaired.

2. Treble speaker repair: it is difficult to wind the voice coil by yourself. The Electronic News once introduced that it is convenient and feasible to wind the enameled wire inside the injection needle. If you have difficulty in making a finished voice coil, make sure that the material and impedance of the original voice coil are the same. No matter they wind or buy the finished product installation positioning must be accurate. According to many years experience, the author in the positioning, can turn the tweeters on audio signal noise first, generally in the output transistor radio, mobile voice coil around slowly, until the loudest, didn't wipe circle phenomenon, 502 glue, and then hold the voice coil with a little attention will be given to less glue, too easy to stick to death, the voice coil scrap.