When i press the call button the radio with the RX icon is not working,the same when pressing the talk button.
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SOURCE: Constant RX mode on cobra microtalk PR3850WX
Sounds like the radio was subjected to electrostatic discharge. If you have your manual, and it describes a way to do a "master reset" on the radio, follow the instructions. This usually involves pushing down on one key while turning the radio on. Otherwise you have to find a licensed dealer for factory service, as there is no way to repair the radio yourself. The use of surface mount technology still confuses many Techs unless they have been to a company's two or three week seminars.
Your radio allows you to listen for weak signals on
the current channel at the press of a key.
To turn ON the Monitor Mode:
• For brief listening, press MON button. The RX
icon blinks.
• Press and hold MON button for 2 seconds until
two beeps sound for continuous listening. The
receiver circuit stays open, letting both the noise
and weak signals to be heard.
To turn OFF Monitor Mode:
Press MON button to return to "Normal" mode,
and the RX icon stops blinking and disappears.
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