GPSMAP 620 and GPSMAP 640 Owner’s Manual 69
Appendix
Charging Your GPSMAP 620 or
GPSMAP 640
• Before using the device for the rst time, charge the battery for
at least six hours.
• Place the device in the mounting bracket with the bracket
connected to power. The vehicle or vessel key may need to be
turned to ON/ACC for the GPSMAP 620 or GPSMAP 640 to
charge.
Changing the Fuse on the Automotive
Mount
Notice
When replacing the fuse, do not lose any of the small pieces, and
put them back in the proper place.
If your unit will not charge in your vehicle, you might need to
replace the fuse located at the tip of the vehicle adapter.
1. Unscrew the black, round end piece, and remove it.
2. Remove the fuse (glass and silver cylinder), and replace it with
a 1.5 A fast-blow fuse.
3. Place the silver tip in the black end piece. Screw on the black
end piece.
Caring for the Unit
The case is constructed of high-quality materials and does not
require user maintenance, except cleaning.
Cleaning the Case
Clean the unit’s outer casing (except for the screen) using a cloth
dampened with a mild detergent solution and then wipe dry.
Avoid chemical cleaners and solvents that may damage plastic
components.
Cleaning the Screen
The unit’s lens is coated with a special anti-reective coating that
is sensitive to skin oils, waxes and abrasive cleaners. Cleaners
containing ammonia, alcohol, abrasives, or anti-grease detergents
will harm the anti-reective coating. It is important to clean the
lens using an eyeglass lens cleaner (that is specied as safe for anti-
reective coatings) and a clean, lint-free cloth.
