Nortel Networks BCM200 manual To remove the clock/calendar battery, Battery replacement overview

Chapter 24 Replacing data cards and processing hardware 319

The clock/calendar battery supplies the power required to keep the CMOS information current if there is a power failure. Figure 174 provides an overview of the process of replacing this component.

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 BCM main unit and possibly cause a fire or explosion.

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.

Figure 174 Battery replacement overview

Do a software shutdown

Set up unit for maintenance

CAREFULLY

lift battery off motherboard

Install

new battery

WARNING:

+ faces up

Restore unit to operation

Danger: Disconnect the power cord, telephone cables, and network cables before opening the computer. Read and follow installation instructions carefully.

To remove the clock/calendar battery

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.

1Shut down the system (see “Performing a system shutdown” on page 231).

2Disconnect the BCM system from the AC power outlet.

3Attach one end of the grounding strap to your wrist and the other end to a grounded metal surface.

4Disconnect any connectors from the front of the base function tray.

BCM200/400 4.0 Installation and Maintenance Guide