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Chapter 20 Replacing data cards and processing hardware 269
Installation and Maintenance Guide
7 Slide the new DIMM, edge connectors first, into the slot.
8 Carefully push the DIMM down until the fastening tabs clip to the side of the DIMM.
9 Replace any boards or cables that you removed to insert the memory chips.
10 Replace the cover.
11 Restore the unit to operation. Refer to “Restarting the system” on page 220 for details.
Replacing the clock/calendar battery
The clock/calendar battery supplies the power required to keep the BIOS information current if
there is a power failure. Figure 138 provides an overview of the process of replacing this
component.
Figure 138 Process Map: Battery replacement overview
Note: The DIMM has two notches on the edge connector. Position the DIMM so that one
of the notches is on the side of the slot nearest to the Business Communications Manager
cards.
Note: Do not force the DIMM into its slot. If the DIMM does not slide in easily, check the
alignment of the DIMM.
Warning: You must replace the battery with a CR2032, 3v Maxell coin cell battery.
Do not use any other manufacturer because this may invalidate the safety approval of the
BCM1000 hardware and possibly cause a fire or explosion.
Danger: Disconnect the telephone cables and network cables and then the ac power
before opening the computer. Read and follow installation instructions carefully.
Do a software
shutdown
Set up unit for
maintenance
Restore unit to
operation
CAREFULLY
lift battery off
motherboard
Install
new battery
WARNING:
+ faces up