Microphone not picking up any sound in bluetooth mode.
Regarding my Nuvi 660 in the blue-tooth mode the unit does not pick-up any sound. I can hear all the sound on the other end of the phone call but by all appearances the unit's microphone is not working. The unit is out of warranty and working fine with the exception of this one problem.
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Re: Microphone not picking up any sound in bluetooth...
First, I would go to the Garmin website and update the bluetooth software. Garmin just released v3.4 a few days ago (November of 2008). Use their webupdater to upgrade the BT firmware.
When you update the firmware, it will erase your phone paring data and you will have to re-pair the phone with your Nuvi.
Now, if that doesn't fix your microphone issue, you have either one of the following two problems:
1. The microphone is a condenser microphone. It's about a 1/4" in diameter and sits behind the front slot located in the lower left hand corner. The microphone has two wires (red & black) that run from the microphone to the main board. At the end of the wires is a 2 position plug that plugs into the main board. This plug can come loose as there is no lock mechanism on it.
2. The microphone is defective.
Please do not try to take apart your Nuvi unless you have the right tools. I have received many emails from people who have further damaged their Nuvi, trying to get it open.
Please let me know if you need further help with this problem.
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Many problems related to pairing can be corrected by verifying that the latest firmware is loaded to the GPS unit and the phone. To update the firmware on the GPS, please use the WebUpdater program. To make sure the phone has the latest firmware updates, please contact the phone service provider for more information.
One additional tip is to always pair the phone with the GPS from the phone itself. Do not attempt to pair to the phone from the GPS unit.
It fixed my garmin Nuvi 660:
With the unit off press firmly on the upper left hand corner of the screen with the tip of your finger.
2. Press the power button.When you see the screen light up let go of the power button but continue to press on the upper left hand corner of the screen until you receive the message "Do You Really Want to Start Up In Maintenance Mode?"
3.Say Yes and then select the third Option "Clear All User Data" and then say Yes.
4.The unit will then start up and ask you to set some preferences.
5.Once the unit is on the Main Menu please sit it in a safe place outside with a clear view of the sky for about 10 minutes and let it lock on to the satellites.
The unit does not save the phone book, it loads it each time your bluetooth phone is in contact with it. To verify this, turn off the bluetooth phone, then try to access the phone book in the GPS unit. It should not come up.
I had the same problem, and this is how I fixed it. Now it's working fine.
Thank you for contacting Garmin International,
you are currently running the most current version of bluetooth
software, and you are still seeing issues where your compatible phone
is still not connecting properly, please try the below procedure, which
will reinstall the version of bluetooth you have downloaded in case
there was any corruption during the transfer or installation of the
1. Power the unit on
2. Touch View Map
3. Touch the ETA/Speed button in the bottom left hand corner.
4. press and hold your finger over the speedometer for 10-15 seconds until a new screen appears.
5. Touch next at the bottom of the screen until the top blue banner reads Bluetooth Status.
6. Touch UPDT P, then Touch yes.
At this point the unit should go to a page that says Updating Bluetooth
Firmware, allow this to finish, once finished, press quit, then press
and hold the back button. At this point, go back through and try to
connect your Bluetooth device again.