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5-2
C
5: M
HAPTER
AINTENANCE AND
Cleaning the
Diskette Drive Head
Replacing the Fuse
U
PGRADES
To avoid excessive diskette wear, change the working diskette every three
months. Refer to "Copying and Formatting Diskettes" for the procedure for
copying diskettes.
In case of a crash, an immediate memory dump may help diagnose the
problem. Keep six diskettes available for this purpose (they do not have to
be formatted). The procedure for dumping memory is described in
"Memory Dump Procedures".
When you change the working diskette (Model CS/3100 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.
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.
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