Nortel Networks BCM200, 400 4.0 manual To install a new clock/calendar battery

Chapter 24 Replacing data cards and processing hardware 321

To install a new clock/calendar battery

Warning: There is a danger of explosion if you do not replace the battery correctly. You must replace the battery with a CR2032, 3v Maxell coin cell battery.

The positive side of the battery must face up and the battery must sit securely in the battery socket.

Warning: Protect the hardware components against damage from electrostatic discharge. Always wear a grounded wrist strap before you handle components. Always place the components in a static-free container.

1Remove the old battery. See “To remove the clock/calendar battery” on page 319.

2Ensure you have the positive side of the battery facing up when you position it in the socket.

3Push down until the battery snaps into the socket.

4Install the media services card. See “To install the media services card (MSC)” on page 306.

5Install the WAN card (if applicable). See “Installing the WAN card” on page 302.

6Partially insert the base function tray into the main unit.

7Connect the DS30 connectors to the MSC.

8Position the PCI cover plate on the front of the base function tray so that the base function tray and cover plate screw holes align.

9Position the PCI cover plate locking screw in the PCI cover plate. Tighten the PCI cover plate locking screw until the plate is firmly set in place (see Figure 163).

10Install the base function tray bezel (see “To install the base function tray bezel” on page 238).

11Completely insert the base function tray into the main unit. See “To install the base function tray” on page 236.

12Restore the BCM system to operation. For details, refer to “Restarting the system after maintenance” on page 232.

BCM200/400 4.0 Installation and Maintenance Guide