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3
Maintenance
This chapter describes routine maintenance designed to keep your ONline
System Concentrator working at its best. It also explains how to replace a
failed power supply or fan unit.
This chapter explains the following maintenance procedures:
❑ Routine Maintenance
❑ Power Supply Replacement
❑ Fan Unit Replacement
❑ ONline Module Maintenance
❑ Other System Components
Warning: There are no serviceable parts on either the power supply
or the fan unit. If either of these parts fail, remove them as
described in this chapter and return them to your reseller or
to 3Com Corporation. You should keep replacement
power supply and fan units at your site so they are available
if needed.