I have two motorola talkabout T5700's. Same model numbers, same s/n but they will not transmit to each other. When set to same channels, same codes, and even without any encryption, neither will receive the others transmission. Both seem fine and working in every other way. What is happening? How can I fix it this? Thanks,

You have the modulation problem. If you have hand free you connect it and try to send message, if other unit hear you then it mean your microphone has faulty and replace the microphone, the fault is in mic or other circuit from mic input to modulation device which may be any transistor , capacitor or any resistance faulty. Consult with any Radio Service Shop.

http://shop.giantintl.com/Manuals.asp, use the pulldown to find your model

From reading through your settings, they appear to be identical. Except, I am not certain what Vox 2 is, or B5 0. If the number 2 beside VOX is a setting, you should set it to off or zero. Otherwise, they appear like they should work. (VOX = voice activation, and when enabled will cause a radio to transmit when it hears a sound, voice, etc.)
If you are using an audio device such as an earpiece or headset, be certain you are plugging it in with the radio turned OFF.
Lack of transmit can also be a sign of a bad battery or bad battery connection. You might try swapping the batteries and see if the problem moves to the other radio.
If these are less than one year old, use the number in your user guide to contact Motorola for a possible warranty replacement.

Best regards.

Hi,

Most radios of this series would have Interference Eliminator Codes. The codes eliminate other incoming transmission not with the same code (number). There could be similar radios working on the same channel/frequency, but if they do not have the same code then neither one would hear each other. This does not make a channel "private", rather it limits what one can hear on that channel to another radio with an identical setting of the code. In some Motorola models, pressing the Menu button until the small numbers/code flashes would enable them to be changed. To change, press the + or - keys. Pressing the MON key or setting the code to Zero would enable the radio to receive and sound off all incoming signals with or without the code.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Check your "code" setting. You may be on the same channel, but different codes. The code is the smaller number. Check your owners manual if you have one for resetting the radio to the factory default settings. This will clear any programming issues.

Hello Krisso,

Your best bet is likely going to be contacting Motorola directly. Their parts department may have the charger available. Their product support number is 1-800-353-2729.

Best Regards,
Ken
"Go Ahead. Use Us."

Every Motorola line TALK ABOUT can work between them.

Hi,

Normally in a Motorola T5700, to set a specific channel to monitor (and reply to) called your working channel, you press the Menu (center) button and the current channel shown in the display will flash. Press either the + or - buttons to change to your desired channel number which should be identical to both radios. Press the PTT button to save.

Likewise, both radios must have identical Interference Eliminator Code. To set code, press Menu till the code display blinks. Press + or - to select code. Press the PTT to save. To disable the code, select 0.

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

Good luck and kind regards.

I think there defective. I'd return them.