Replacing The Real-Time Clock Battery - NEC MC2200 User Manual

1. Power off the system and remove the left side panel as described on page 4-3.
2. Using a IC removal tool or a small pointed tool, gently pry up each end of the non-
volatile memory and pull it straight up out of its socket (Figure 4-2).
3. Orient the new chip over its socket so the dot is properly oriented. Carefully insert
the chip into its socket connectors.
4. Press down on the chip until it is firmly seated in its socket.
5. Replace the side panel and turn on the system.
6. Run the BIOS SETUP and RCU to restore proper configuration settings.

Replacing the Real-time Clock Battery

You may need to replace the real-time clock battery because of its life span. The battery
(Vendor Part #CR2450) is a commodity part available through many vendors. Its located
on your system board as shown in the next figure. Notice the plus (+)sign on the battery.
This sign will assist you in correctly positioning the battery on the system board.
Danger of explosion if battery is incorrectly replaced. Replace only
with same or equivalent type recommended by manufacturer.
Dispose of lithium batteries as required by local ordinance or as
normal waste if no local ordinance exists. Do not expose the
component to excessive heat or fire. Keep all batteries away from
children
4-6 Upgrading Your System
Figure 4-2 Non-Volatile Memory Location
! CAUTION