What should I do if I cannot hear the other party's speech when the radio is receiving a call?

What should I do if I cannot hear the other party's speech when the radio is receiving a call?

The user cannot hear the other party's speech when using the walkie-talkie to receive a call;
This type of malfunction of the walkie-talkie is mostly caused by a problem with the receiving circuit or a damaged speaker;
According to maintenance experience, especially the failure rate of speaker damage is higher.

First of all, check whether the receiving circuit of the walkie-talkie is normal. If the receiving circuit is normal, then the possibility of noise and damage to the walkie-talkie is very high.

Walkie-talkies are widely used in public security and other communication networks because of their better quality, but the possibility of speaker failures is higher if they are used for a long time.
The loudspeaker is small, and it is usually difficult to buy the same type of loudspeaker. Based on years of repair experience, the following methods can be used to restore.
The speaker sound film was carefully taken out, and it was found that because the factory used glue to fix its voice coil wire on the sound film, and the other side was fixed on the bracket with glue, the wire from the sound film to the rack was disconnected due to vibration. The circle is intact.
When repairing, carefully remove the upper thread of the sound film, weld it with 0.07mm enameled wire, hold the butyl rubber and fix it on the sound film. Just on-chip.