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Garmin FORERUNNER 645 MUSIC オーナーズマニュアル
Synchronizing can take several minutes.
NOTE: Refreshing the Garmin Connect Mobile app or the
Garmin Connect application does not synchronize your data
or update your step count.

The floors climbed amount does not seem accurate

Your device uses an internal barometer to measure elevation
changes as you climb floors. A floor climbed is equal to 3 m
(10 ft.).
• Avoid holding handrails or skipping steps while climbing
stairs.
• In windy environments, cover the device with your sleeve or
jacket as strong gusts can cause erratic readings.

My intensity minutes are flashing

When you exercise at an intensity level that qualifies toward
your intensity minutes goal, the intensity minutes flash.
Exercise for at least 10 consecutive minutes at a moderate or
vigorous intensity level.

Acquiring Satellite Signals

The device may need a clear view of the sky to acquire satellite
signals. The time and date are set automatically based on the
GPS position.
1
Go outdoors to an open area.
The front of the device should be oriented toward the sky.
2
Wait while the device locates satellites.
It may take 30–60 seconds to locate satellite signals.

Improving GPS Satellite Reception

• Frequently sync the device to your Garmin Connect account:
◦ Connect your device to a computer using the USB cable
and the Garmin Express application.
◦ Sync your device to the Garmin Connect Mobile app using
your Bluetooth enabled smartphone.
◦ Connect your device to your Garmin Connect account
using a Wi‑Fi wireless network.
While connected to your Garmin Connect account, the device
downloads several days of satellite data, allowing it to quickly
locate satellite signals.
• Take your device outside to an open area away from tall
buildings and trees.
• Remain stationary for a few minutes.

Restarting the Device

If the device stops responding, you may need to restart it.
NOTE: Restarting the device may erase your data or settings.
1
Hold
for 15 seconds.
The device turns off.
2
Hold
for one second to turn on the device.

Resetting All Default Settings

NOTE: This deletes all user-entered information and activity
history. If you have set up a Garmin Pay wallet, restoring default
settings also deletes the wallet from your device.
You can reset all of the device settings to the factory default
values.
1
Hold UP.
2
Select Settings > System > Reset.
3
Select an option:
• To reset the all of the device settings to the factory default
values and delete all activity information and stored music,
select Delete Data and Reset Settings.
26
• To reset all of the device settings to the factory default
values and save all activity information and stored music,
select Reset Default Settings.
Updating the Software Using Garmin
Express
Before you can update your device software, you must have a
Garmin Connect account, and you must download the Garmin
Express application.
1
Connect the device to your computer using the USB cable.
When new software is available, Garmin Express sends it to
your device.
2
Follow the on-screen instructions.
3
Do not disconnect your device from the computer during the
update process.
NOTE: If you have already set up your device with Wi‑Fi
connectivity, Garmin Connect can automatically download
available software updates to your device when it connects
using Wi‑Fi.

My device is in the wrong language

You can change the device language selection if you have
accidently selected the wrong language on the device.
1
Hold UP.
2
Scroll down to the last item in the list, and select START.
3
Scroll down to the second to last item in the list, and select
START.
4
Select START.
5
Select your language.
Is my smartphone compatible with my
device?
The Forerunner device is compatible with smartphones using
Bluetooth Smart wireless technology.
Go to
www.garmin.com/ble

Tips for Existing Garmin Connect Users

1
From the Garmin Connect Mobile app, select
2
Select Garmin Devices > Add Device.

My phone will not connect to the device

• Enable Bluetooth wireless technology on your smartphone.
• Bring your phone within 10 m (33 ft.) of the device.
• On your smartphone, open the Garmin Connect Mobile app,
select
or
, and select Garmin Devices > Add Device to
enter pairing mode.
• On your device, hold LIGHT, and select
Bluetooth technology and enter pairing mode.

Maximizing the Battery Life

You can do several things to extend the life of the battery.
• Reduce the backlight timeout
Settings, page
23).
• Use UltraTrac GPS mode for your activity
page
22).
• Turn off Bluetooth wireless technology when you are not
using connected features
page
13).
• When pausing your activity for a longer period of time, use
the resume later option
• Turn off activity tracking
for compatibility information.
or
to turn on
(Changing the Backlight
(UltraTrac,
(Bluetooth Connected Features,
(Stopping an Activity, page
(Activity Tracking Settings, page
Troubleshooting
.
2).
8).