3Com CS/2500, Installation Manual

Page: 66 / 116

5-2 C
HAPTER
5: M
AINTENANCE AND
U
PGRADES
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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
Drive Head
When you change the working diskette (Model CS/2600 only), clean
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:
1 Apply 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.
2 Immediately insert the cleaning diskette in the drive.
3 Press the reset switch and wait until the Boot State light and the activity
light on the diskette drive go out.
4 Press 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.
1 Remove the fuseholder cartridge by inserting a small slotted
screwdriver into the slot, as illustrated in Figure 5-1.
CS2500BookFile : MaintenanceUpgrades Page 2 Thursday, December 11, 1997 10:44 AM