1. No output from the power amplifier tube; replace with a new tube.
2. The microphone is broken. Replace it.
Q
Reception indicator is green but no sound
A
1. The speaker may be damaged and needs to be replaced.
2. The audio power amplifier may be damaged and needs to be replaced.
3. The switch tube may be damaged and needs to be replaced.
Q
When I read/write frequency, the computer prompts "Initialization serial port error! Communication failure"
A
The reasons might be:
1. The PC software model and version are incorrect;
2. The radio is not powered on;
3. The program cable is not original from the manufacturers;
4. The USB interface driver is not installed;
5. The wrong port is chosen;
If not the reasons above, please contact the manufacturer and distributor.
Q
Low, intermittent or silent signal reception
A
1. Check whether the battery is too low; recharge or replace the battery.
2. Check whether the volume itself is low, increase the volume through the knob or contact the dealer and manufacturer to adjust the microphone gain function.
3. Check whether the antenna is loose or not properly installed. Reinstall the antenna after power-off.
4. Check whether the speaker is damaged or blocked; do some external cleaning.
5. Check whether the radio is beyond BS coverage.
Q
Other voice or noise occurs in the channel
A
1. Check whether it is interfered by the same frequency users. It is suggested to change the frequency or adjust the noise level.
2. You can configure signaling for all terminals in the group to prevent co-frequency interference. The signaling settings of all terminals must be changed at the same time.
