3Com CS/2500 Installation Manual

Contents

5-2 CHAPTER 5: MAINTENANCE AND UPGRADESn To avoid excessive diskette wear, change the working diskette everythree months. Refer to “Copying and Formatting Diskettes” on page 3-4for the procedure for copying diskettes.n In case of a crash, an immediate memory dump may help diagnose theproblem. Keep four high-density diskettes available for this purpose. Theprocedure for dumping memory is described in “Memory DumpProcedures” on page 6-5.Cleaning the DisketteDrive HeadWhen you change the working diskette (Model CS/2600 only), cleanthe diskette drive head using a head-cleaning diskette intended for usewith a 3.5-inch diskette drive. To clean the diskette drive head:1 Apply solvent to the cleaning diskette, according to instructions providedwith the head-cleaning kit.CAUTION: Do not use a fluorocarbon-based solvent; it will damage theheads. Use only alcohol-based solvents.2 Immediately insert the cleaning diskette in the drive.3 Press the reset switch and wait until the Boot State light and the activitylight on the diskette drive go out.4 Press the reset switch three more times, each time waiting until theactivity light on the diskette drive goes out.Replacing the Fuse The server’s fuse is located inside the power supply module on the backpanel. It is mounted in a single, removable cartridge.If your unit persistently blows fuses, there may be a problem with eitheryour system’s power supply or your facility’s supply voltage. Contact3Com or your network supplier for assistance.To change a fuse, follow this procedure:WARNING: Be sure the unit is turned off and the power cord is eitherdisengaged from the unit’s receptacle or unplugged from the wall socket.1 Remove the fuseholder cartridge by inserting a small slottedscrewdriver into the slot, as illustrated in Figure 5-1.CS2500BookFile : MaintenanceUpgrades Page 2 Thursday, December 11, 1997 10:44 AM