NEC DS1000 Correspondence Course Workbook page 49

NEC America
DS1000/2000 Correspondence Course
Replacing the Battery
You should only need to replace your battery if it fails to hold a charge (i.e.,
no longer backs up memory and the Real Time Clock).
1. Do not power down the system.
If you power down the system and remove the battery, programmed
data and the Real Time Clock will reset to the factory-installed
default settings.
2. Gently push down on the battery and remove it.
3. Replace the battery with a Sony CR2032 3 Volt Lithium cell battery or
equivalent. (This battery is not available from NEC.)
4. Verify that the system's programmed data is intact.
5. Discard the old battery.
Take proper precautions when discarding the battery. It may be considered
hazardous material in some areas.
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufac-
turer. Dispose of used batteries according to the manufacturer's instructions.
Install the Expansion Board.
The Expansion Board pro-
vides an additional 3 analog
trunks, 8 digital extensions,
4 analog extensions and 1
analog door box. With the
expansion board installed,
the capacity of your system
is 6 analog trunks, 16 digital
extensions, 8 analog exten-
sions, and 2 analog door
boxes.
1. Be sure your system's
power cord is unplugged.
The Expansion Board is not hot-swappable.
2. Plug in the Expansion Board as shown at right.
Be sure to snap the Expansion Board into the plastic standoffs that
are supplied with the Expansion Board.
Replace and resecure the top panel.
DS1000 System Installation
!! Caution !!
DS1000/2000 Workbook 49