Internet Router Hardware Guide

Replacing Hardware Components
Figure 80: Installing the Rear Upper Impeller Assembly
1934
Replacing Host Module Components
For instructions on replacing host mo dule components, see the following sections:
Replacing an MCS on page 159
Removing and Insert the PC Card on page 163
Replacing a Routing Engine on page 165
Replacing an MCS
The MCSs are hot-pluggable, as d escribed in Field-Replaceable Units (FRUs) on page
4. For a description of the effect of removing an MCS, see Host Module on page 22.
To replace an MCS, perform the following procedures:
Removing an MCS on page 159
Installing an MCS on page 161
Removing an MCS
To remove an MCS, follow this procedure (see Figure 81):
1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
2. A tt ach an electrostatic discharge (ESD) grounding strap to your bare wrist and
connect the strap to one of the ESD points on the chassis. Make sure t he router
is attached to a proper earth ground. For more information about ESD, see
“Preventing Electrostatic Discharge Damage” on page 226.
Replacing Host Module Components 159