3Com Router 3012, Руководство по установке

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52 C
HAPTER
5: M
AINTAINING THE
R
OUTER
Maintaining Router
Hardware
In preparation for the maintenance of your router hardware, collect and have
ready 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:
■
There is a seal on one of the screws on the chassis of the Router 3000 routers.
When the Service representative performs maintenance on the router, the seal
is must be intact. Contact your Service representative before you open the
chassis.
■
Replace the hardware of router sensibly and in a proper way under the
guidance of the technical support personnel.
■
Confirm that all power supplies have been disconnected from the router while
performing the hardware maintenance. Otherwise, the operator may get
injured through an electric shock.
■
Wear an ESD-preventive wrist strap and ESD-preventive gloves during the
hardware maintenance for the router and ensure that the strap makes a good
skin contact.
■
For the device to operate normally, 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 your 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.