Specifications
Table Of Contents
- SGI™ 1400 Server Family Maintenance and Upgrades Guide
- List of Figures
- List of Tables
- About This Guide
- Working Inside the System
- Tools and Supplies Needed
- Safety: Before You Remove the Access Cover
- Warnings and Cautions
- Removing the System Access Cover
- Installing the Access Cover
- Working in the Subchassis and Electronics Bay
- Installing PCI Boards
- Removing a PCI option Board
- Removing the Front Panel Board
- Installing the Front Panel Board
- Removing the Diskette Drive
- Installing the Diskette Drive
- Peripheral Drives
- System Fans
- The Power Share Board
- Upgrading Baseboard Components
- SGI 1400 Server SCSI Backplane Installation
- Technical Reference
- Baseboard Connectors
- Main Power Connector
- Auxiliary Power
- Diskette Drive
- Front Panel Connector
- The SMM Connector
- The IPMB Connector
- VGA Video Port Connector
- Keyboard and Mouse
- Parallel Port
- Serial Ports A and B
- Universal Serial Bus
- Narrow SCSI Connector
- Wide SCSI Connector
- Internal IDE Connector
- The Hard Drive LED Connector
- ISA Connector Pinouts
- The PCI Connectors
- Baseboard Jumpers
- System I/O Addresses
- Memory Map Address Range
- Interrupts
- Video Modes
- Baseboard Connectors
- Equipment Log and Configuration Worksheets
- Environmental Specifications
- Chassis Warnings and Safety
- Index
Replacing the Backup Battery
53
Replacing the Backup Battery
The lithium battery on the baseboard (Figure 2-11) powers the real-time clock (RTC) for
three to four years in the absence of power. When the battery weakens, it loses voltage
and the system settings stored in CMOS RAM in the RTC (e.g., the date and time) may
be wrong. Contact your customer service representative or dealer for a list of approved
devices.
Warning: If the system has been running, any installed processor and heat sink on
the processor board(s) will be hot. To avoid the possibility of a burn, be careful when
removing or installing baseboard components that are located near processors.
Thefollowingwarningandtranslationsofthewarningarerequiredbyspecificcertifying
agencies to be printed immediately adjacent to the procedure for removing the RTC.
Warning: There is a danger of explosion if the battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the equipment
manufacturer. Discard used batteries according to manufacturer’s instructions.