When there is a problem of no response after turning on the plug-in walkie talkie, we need to measure the DC working voltage of the main points of the CPU control board. If the voltage does not match the normal value, we need to turn off the plug-in walkie talkie and measure the resistance. When the resistance between the intermediate frequency circuit board and the ground of the display control board is around 600, it can be determined that the ground terminal of a certain board of the walkie talkie is not connected properly. Next, we can use copper wires to weld the intermediate frequency board to the ground wire of the control, which will eliminate the fault.

The receiving part of the walkie talkie directly receives the transmitted signal and processes it into an audio signal. Finally, it is amplified, bandpass filtered, and de emphasized to drive the speaker to produce sound. The speaker manufacturer tells everyone that the modulation part converts language into electrical signals through microphones.