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GPSMAP 620 and GPSMAP 640 Owner’s Manual 73
Appendix
Problem/Question Solution/Answer
How do I know my
GPSMAP 620 or
GPSMAP 640 is in
USB mass storage
mode?
When your device is in USB mass storage
mode, a picture of a GPSMAP 620 or
GPSMAP 640 connected to a computer
is shown. Also, you should see two new
removable disk drives listed in My Computer.
My computer
never detects the
GPSMAP 620 or
GPSMAP 640 when I
connect it.
1. Unplug the USB cable from your computer.
2. Turn off the GPSMAP 620 or GPSMAP 640.
3. Plug the USB cable into a USB port on
your computer and into your device.
The GPSMAP 620 or GPSMAP 640
automatically turns on and goes into
USB mass storage mode. Ensure your
GPSMAP 640 is connected to a USB port
and not a USB hub.
I cannot see any new
removable drives in
my list of drives.
If you have several network drives mapped
on your computer, Windows can have trouble
assigning drive letters to your GPSMAP 620
or GPSMAP 640 drives. See your operating
system Help le to learn how to map or assign
drive letters.
How can I nd
restaurants near the
hotel I will be staying
at in the future?
1. Touch Where To? > Near > A Different
City.
2. Find the hotel, and touch Go!.
3. Touch Menu > Where To? > Near > My
Destination.
4. Search for a restaurant. Restaurants
nearest your hotel are listed rst.
Messages and Alarms (Marine Mode)
Boat is not Moving Fast Enough to Calibrate—(speed sensor)
appears during water speed calibration. Check the speed wheel for
blockage and calibrate again. If the wheel is clear, calibrate again
and increase speed.
Can’t Read User Card—cannot read card when attempting a user
data transfer.
Can’t Unlock Maps—maps are locked and cannot be used on this
unit.
Can’t Write User Card—cannot write card when attempting a
user data transfer.
Database Error—general database error. Contact product support.
Lost Satellite Reception—the unit has lost satellite reception.
Make sure you have a clear view of the sky.
Maps Fit, Some Maps Will Not Be Drawn—there are more maps
present on the SD card than what the unit can support. Some of the
maps on the card will not be drawn or used to nd map features.