How to repair the trumpet for epidemic prevention and control?

The horn for epidemic prevention and control is repaired as follows:

1. Glue the dust cover of epidemic prevention trumpet with the paper basin along the inclined plane with an artist blade. Make a small cut of about 2 to 3 mm on the tool and tear it slowly by hand.

2. Find out the voice coil of the small horn for epidemic prevention and control, and use a multimeter to find the open circuit, usually the joint between the voice coil and the copper wire. After welding with electric soldering iron, repair with AB glue.

3. If the whole voice coil is damaged or burnt marks can be seen, directly replace the voice coil, and pay attention to observe the resistance and parameters of the voice coil when replacing.

4. After replacement, assemble and paste the original epidemic prevention control horn, and then repair the epidemic prevention control horn.