Question about Motorola Talkabout FRS 250 (14 Channels) 2-Way Radio

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Push to talk problem

When i push to talk on radio #1 there is no sound coming from radio #2 as if i have a mic problem on radio 1 . From radio #2 to #1 everything is fine. How do i repair a mic problem

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Re: Push to talk problem


If indeed radio #1 has a mic problem, this may be confirmed by trying an external speaker/microphone plugged into the accessory jack. If still a no, then its not the mic but possibly the modulator circuitry. If there is transmit audio with the external mic and hence internal mic is defective, the unit would have to be pried open and the defective component replaced. The internal mic is normally an electrofet 2-3 terminal soldered to a shielded wire and physically attached to the front plate.

Alternately, another possibility is that radio #2 has its Interference Eliminator Code enabled/activated. This is indicated by the presence of small sized digits on the top right of display. If this is the case and no similar digits are displayed in radio #1, then radio #2 will not allow any received transmission to be heard. Along the same line of reasoning, if the code is activated on both radios signified by the presence of the 2 small digits, and radio #1 has a problem with its CTCSS (code) generator, then it would also prevent reception of radio #2. A way to verify this is by deactivating/disabling the Interference Eliminator Codes on both radios.

On certain occasion, it is also possible that radio #2 has a defective speaker. You should be able to verify this by plugging in an external speaker to the accessory jack of radio #2.

Hope this be of some help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

Posted on Nov 10, 2007

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