Maintenance 3 - 1
3Maintenance
This chapter describes routine maintenance de signed to keep your O Nline
System Concentrator working at its bes t. It also explains how to replace a
failed power supply or fan uni t.
This chapter explains the following ma in tenance procedures:
❑Routine Maintenance
❑Power Supply Replacement
❑Fan Unit Replacement
❑ONline Module Maintena nc e
❑Other System Compone nts
Warning: There are no servicea ble parts on either the power supp ly
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 sho uld keep replacement
power supply and fan units at your site so they are available
if needed.