320 Chapter 24 Replacing data cards and processing hardwareN0060612N0060612To install a DIMM card1 Position and correctly align the new DIMM (edge connectors first) into the connector.2 Carefully and firmly press down on the top of the DIMM card with your thumbs. At the sametime, use your index fingers to move the fastening tabs inward toward the card. When the cardis completely inserted in the connector, the fastening tabs clip to the side of the DIMM card.3 Install the media services card (see “To install the media services card (MSC)” on page 308).4 Partially install the base function tray in the main unit.5 Install the WAN card (if applicable). See “Installing the WAN card” on page 304.6 Connect the DS30 connectors to the MSC.7 Completely install the base function tray in the main unit (see “To install the base functiontray” on page 238). Ensure you do not pinch or damage any cables.8 Install the base function tray bezel. See “To install the base function tray bezel” on page 240.9 Insert all connectors in the correct locations on the base function tray face.10 Restore the BCM system to operation. Refer to “Restarting the system after maintenance” onpage 234 for details.Replacing the clock/calendar batteryThis section describes how to remove and install the clock/calendar battery located on the maincard. This section provides the following procedures:• “To remove the clock/calendar battery” on page 321• “To install a new clock/calendar battery” on page 323Note: There must be at least one DIMM installed in the BCM main unit for the system tofunction.Warning: Protect the hardware components against damage from electrostatic discharge.Always wear a grounded wrist strap before you handle components. Always place thecomponents in a static-free container.Note: The DIMM has two notches on the edge connector. Position the DIMM sothat one of the notches is on the side of the slot nearest to the BCM cards.Note: Do not force the DIMM into its slot. If the DIMM does not slide in easily,check the alignment of the DIMM.
