1. the speaker is broken; replace it.
2. Audio power amplifier IC may be damaged; replace it.
3. Check whether the volume knob is adjusted to the maximum.
Q
The transmission indicator is red but the call receiver hears no voice.
A
1. No output from the power amplifier tube; replace with a new tube.
2. The microphone is broken. Replace it.
3. Check whether the frequency is consistent.
4. Beyond the coverage.
Q
After reading recorded files for a long time, the prompt says Communication Failed.
A
1. Read the recording in sections and read part by part.
2. Do not use USB extension cable; use CPS cable to read.
Q
The recorder doesn't record.
A
In PC software, go to Sound Functions and enable the Recording feature.
Q
How long is the standby time?
A
With a 2000mAh high capacity lithium battery, the radio works over 12 hours in 5-5-90 working cycle and high power transmission.
