Speaker Repair Coil Replacement
In general, the loudspeaker coil will light up as a result of overload or if the amplifier fails and supplies DC voltage to the output. Generally, repairs are not made for low-power speakers, but for expensive high-power speakers, repair... Electronics Projects, Speaker Repair Coil Replacement "technical video, " Date 2019/12/08
In general, the loudspeaker coil will light up as a result of overload or if the amplifier fails and supplies DC voltage to the output. Generally, repairs are not made for low-power speakers, but for expensive high-power speakers, repair is more economical.
Tools for replacing the speaker coil;
Hobby drill or hand motor
Scissors
Soldering iron
Toluene (used as solvent, a derivative of thinner)
Solder wire
Fine-tip tweezers
Masking tape
Radiography Transparent or inch plastic card
Epoxy resin
Black contact adhesive
A fan or compressor air gun
First of all, the coil cover is removed and Toluene is applied around the cover and the cover is carefully removed with a plastic part.
Then the soldering iron and coil connections are separated and removed with the burned coil carcass. It should be careful when separating the wires, and it is useful to slightly bend them so that they do not escape.
After removing the coil, the adhesive residues in the housing are cleaned by hand motor while doing this operation. In addition, dust can escape around the magnet metal inside the housing, to prevent this, you can put a piece of cloth inside and remove it at the end of the job, or you can stick paper tape on the plastic card and erase the magnet metal. Afterwards, dust and component residues are removed with a compressor.
If everything went so far, the new bonnet is assembled and the coating of the parts to be soldered is burned, cleaned and mounted to the housing.
Epoxy mixture is prepared and applied around the coil. An important detail at this stage is that the core of the bobbin needs to be centered so that you can place plastic strip pieces between the magnet metal and the crow and remove it after drying.
After drying, it is checked and soldered coil wires. Coil wires are covered with black contact adhesive.
Finally, the cover is glued and placed on a weight that does not cause collapse and left to dry. The author stated that 24 hours should be waited for the sound tests.
Speaker Coil Winding
Source:videorockola.com/tutoriales/arreglo-mantenimiento-parlantes/cambiar-bobina-parlante-altavoz/
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