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46 CHAPTER 4: MAINTAINING THE ROUTER
Maintaining Router
Hardware
In preparation for the maintenance of your router hardware, have the following
tools:
■ Phillips screwdriver
■ ESD-preventive wrist strap and ESD-preventive glove
■ Static shielding bag
■ Chip extractor
CAUTION: Observe the following precautions when maintaining your router
hardware:
■ On the Router 3000, there is a seal on one of the screws on the chassis.
Contact your Service representative before you open the chassis.
■ Always maintain the router under the guidance of technical support personnel.
■ Confirm that all power supplies have been disconnected from the router when
performing hardware maintenance.
■ Wear an ESD-preventive wrist strap and ESD-preventive gloves during hardware
maintenance and ensure that the strap makes skin contact.
■ Use only the SDRAM provided by 3Com Corporation.
Opening the Cover of
Router Chassis
Use the following procedure to open the router chassis cover:
1 Turn off the power to router and remove the power cord.
2 Remove all port cables on the back panel of the router. Do not remove the PGND
cable.
3 Place the router upside down on a work surface. Remove the screws on the
bottom of the chassis with the Phillips screwdriver and set them aside.
4 Turn the router right side up, with the rear panel toward you.
5 Remove the captive screws on the rear panel with the Phillips screwdriver and set
them aside.
6 Raise the chassis cover until it is free of the bottom of the router, and put it to one
side.
Figure 25 Removing the Screws from the Bottom of the Router Chassis