3Com CS/2500 manual Maintenance and Upgrades

5-2 CHAPTER 5: MAINTENANCE AND UPGRADES

■To avoid excessive diskette wear, change the working diskette every three months. Refer to “Copying and Formatting Diskettes” on page 3-4 for the procedure for copying diskettes.

■In case of a crash, an immediate memory dump may help diagnose the problem. Keep four high-density diskettes available for this purpose. The procedure for dumping memory is described in “Memory Dump Procedures” on page 6-5.

Cleaning the Diskette	When you change the working diskette (Model CS/2600 only), clean
Drive Head	the diskette drive head using a head-cleaning diskette intended for use
	with a 3.5-inch diskette drive. To clean the diskette drive head:

1Apply solvent to the cleaning diskette, according to instructions provided with the head-cleaning kit.

CAUTION: Do not use a fluorocarbon-based solvent; it will damage the heads. Use only alcohol-based solvents.

2Immediately insert the cleaning diskette in the drive.

3Press the reset switch and wait until the Boot State light and the activity light on the diskette drive go out.

4Press the reset switch three more times, each time waiting until the activity light on the diskette drive goes out.

Replacing the Fuse The server’s fuse is located inside the power supply module on the back panel. It is mounted in a single, removable cartridge.

If your unit persistently blows fuses, there may be a problem with either your system’s power supply or your facility’s supply voltage. Contact 3Com 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 either disengaged from the unit’s receptacle or unplugged from the wall socket.

1Remove the fuseholder cartridge by inserting a small slotted screwdriver into the slot, as illustrated in Figure 5-1.