??dear i need Motorola Talkabout MR350 schematic ?or service manual i need to make maintenance and i do not know how figure out without the schematic?

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Mark
Motorola Mobility Support

Check your CODE settings. From your description you likely have the CODE set to a different number on the MR350 than the MD200. I would guess the MD200 is set to zero since you can hear the MR350 when it transmits. Set your codes to match one another, and turn off any special features such as call alert or Qt filtering.
Ordinarily I would post links to the user guides, but FixYa seems to be having a problem with this feature today. If you need the user guides visit giantintl dot com website.
Best regards.

Holding in the MENU a long press will turn the LOCK on or off. You will need the menu unlocked for the following...

However, if you press the MENU button repeatedly, not holding it in a long press, you will walk through all the menu items, and there you will see when the CODE number begin to flash. You will also see setting for other features as you walk though the menu. Refer to your manual for these settings.

http://www.giantintl.com/ContentManage/manuals/Moto/MR350-351%20User%20Guide%2012-16-08%20KEM-PK14190-90.pdf

Best regards.

Likely not compatible. One thing to try is to make certain the transmitting unit is turned OFF when you initially plug in the headset. Sometimes if a headset is plugged into a radio when it is already ON, the headset will appear to be in VOX (voice activated) mode and will not allow the user to receive. Also, if this headset has an inline PTT, it may not be compatible with the radio and you would need to use the PTT on the radio.

If this doesn't work, you would need to use the TalkAbout headset designed for the MR350.

Best regards.

Try
mauritron.com

They have the world's largest library of
owners user instructions operating guides
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I'm not connected to them, just a satisfied user.
Also if you don't find your item in their listing then ask and they will get it for you

Here is a link to the user guide http://www.giantintl.com/ContentManage/manuals/Moto/MR350-351%20User%20Guide%2012-16-08%20KEM-PK14190-90.pdf On page two, in the lower right corner there is a phone number and email address for assistance. They may be able to assist you in getting a new battery door.

Best regards.

Here is a link to the user guide: http://www.giantintl.com/ContentManage/manuals/Moto/MR350-351%20User%20Guide%2012-16-08%20KEM-PK14190-90.pdf You will find the instructions for VOX and iVOX on the bottom of page one, and at the beginning of page 2.

Be certain when plugging in your audio accessory that the radio is turned off. If the radio is left on inadvertently, you would have no control over the VOX settings, it would immediately be in a confused VOX mode.

Also, with most Motorola radios, if VOX begins to occur, turn off the radio, and then re-insert the audio device plug. And in some instances, pressing the PTT on the radio when you are having a VOX occurrence will put the radio back to push-to-talk status.

Best regards.

Grasp the black bottom sides of the radio and tug it hard. No screws to loosen. The bottom slides off. The battery placement will be in there.

We are a M dealer and the schematics for the TalkAbout line were never released to the dealer channel.

to dissamble this radio you have to remove the face panel, under this face panel ( the blue one) you will find others screws. first of all try if you have an audio accesorie, with this earbund or head set the audio must be normal or the same quality than the other one, if is not, the radio need quilified service. Good luck Ernesto