After the intercom was turned on, there were Dudu alarm?

Most walkie -talkies have fault self -test function. When the alarm of a beep is issued when the power is turned on, it shows that the intercom was found to find problems when the self -inspection was turned on. The problems that can be found in the intercom self -inspection include:

1. There is an error in the frequency. When the frequency is written, the frequency range of the intercom is exceeded.

2. Poor soft circuit contact, you need to replace the soft circuit plug or motherboard socket;

3. VCO locks, or related devices are damaged, you need to replace 12.8M crystal or TC1, TC2 and other related devices;

Generally speaking, if the governance of the quality pass is not often hit, or the use time is too long, the chance of hardware problems will not be high. Everyone encounters problems when using. Or the method of use is wrong, and then check the inspection. It should also be sent to a regular repair point during maintenance to ensure the quality of maintenance.