Chapter 20 Preparing hardware for maintenance or upgrades 231BCM200/400 4.0 Installation and Maintenance GuideChapter 20Preparing hardware for maintenance or upgradesThis chapter describes how to prepare the BCM system for maintenance activities. The followingprimary topics are covered in this chapter:• “Precautions” on page 231• “Special tools” on page 233• “Performing a system shutdown” on page 233• “Restarting the system after maintenance” on page 234• “Base function tray maintenance procedures” on page 235• “Advanced function tray maintenance procedures” on page 241• “Removing and installing the main unit top cover” on page 246• “Using the backup and restore utility” on page 250PrecautionsBefore you replace or update any hardware on the BCM system, disconnect the system from thetrunk lines.Remove the top cover to access the standard power supply, I/O card, or backplane components.For fan, hard disk, or power supply maintenance, remove the appropriate chassis panels. Removethe base function tray to replace any PCI cards. Remove the advanced function tray from theBCM400 main unit to replace or upgrade the hard disk. If applicable, remove the main unit fromthe server rack.Observe the following precautions when working inside the BCM system. Maintain a clean andstatic-safe site.Danger: Electrical shock warningDisconnect the power cord, telephone cables, and network cables before opening the BCMmain unit. Read and follow installation instructions carefully.Danger: Electrical shock warningPartially remove the power supply module from the power supply cage. Do not completelyremove the power supply module. IMPORTANT: Wait several seconds before removingthe power supply module completely from the power supply cage to ensure completeelectrical discharge.Caution: Use only a Nortel-approved replacement. Contact your account representativefor the current list of approved replacement parts.
