Garmin GPS-III+ Use and care manual

Garmin® GPS-III+ Backup Battery Replacement
If you receive a screen message that your backup battery has lost charge, it is time to
replace it. Here is how.
1. Tools and supplies
a. Japanese JIS Standard “Phillips” head screwdrivers. These drivers are cut
in a different manner and provide a good grip on the screws. You will
mess the screws up if you do not use JIS screwdrivers.
b. De-soldering gun, de-soldering braid or solder sucker.
c. Soldering station with a fine tip
d. Solder
e. Precision sidecutters
f. Battery. Panasonic VL1220-1VC. These are available from
www.mouser.com
1. Replacing the battery. If you do not have the equipment and ability to do fine
soldering do not attempt this project. Please note that removing the backup
battery will delete all waypoints and other stored information.
a. Remove six screws from the back of the case
b. Carefully open the case. There is a connector cable that you can damage
if it suddenly pops open.

c. Using a jeweler’s screwdriver, gently pry up the white cable connector
from the circuit board and set the back of the case aside.
d. Locate the battery. It is on edge next to a capacitor just to the left of the
white connector.

e. Using a jeweler’s screwdriver, pull the plastic clamp back on the brown
ribbon cable to the stops.
f. Remove the screw near the metal can on the antenna end of the board.
g. Gently tip the board up, hinging on the ribbon cable edge. The board will
stick and it will take some leverage to get it up. The ribbon cable will
slide out of the clamp.
h. Turn the board over and locate the battery pads on the back side of the
circuit board and remove the solder.
i. Remove the battery and clean the holes in the pad.
j. Insert the new battery, and check the polarity. The positive side of the
battery should be towards the metal can on the antenna end.
k. Solder the battery leads and trim them.
l. Replace the board in the chassis. Slide the ribbon cable into the clamp, set
the board in place, and install the screw.
m. Replace the white cable clamp
n. Making sure antenna wire is not pinched, reassemble the case and install
the screws.
o. You are done!