Cisco 2851 - Integrated Services Router User Manual page 145

Perform the following steps to loosen the cover from the chassis:
Step 4
Insert the blade of a 1/4-inch screwdriver straight into the square hole on either side of the chassis
a.
near the rear, so that it bottoms against the chassis and does not go past the chassis and into the
narrow slot. See
Make sure that the tip of the screwdriver does not slide into the narrow vertical slot that is visible inside
Caution
the square hole. The tip of the screwdriver should rest on the metal tab just inside the chassis cover and
to the right of the vertical slot.
Figure 4
With the screwdriver positioned as required in Step
b.
toward the rear of the chassis to loosen one side of the cover. See
The friction fit may be fairly tight; however, if the cover does not move with moderate effort, make sure
Caution
that the screwdriver is not inserted into the narrow vertical slot.
Figure 5
Repeat Step
c.
The cover should now be positioned back from the bezel about 1/4 inch (6 to 7 mm). If it is not,
repeat Step
Slide the cover toward the rear of the chassis until it contacts a stop (about 1 inch [25 mm]) and the front
Step 5
edge of the cover is free. See
Note
OL-5792-04
Figure 4.
Inserting the Screwdriver into the Side of the Chassis
Screwdriver must not
enter the vertical slot
Rotating the Screwdriver to Loosen the Chassis Cover
a. and Step b. for the opposite side of the chassis.
a. and Step b. for one or both sides of the chassis.
Figure
After the cover is loosened as in
complete the removal. However, do not use the screwdriver again as in
a. above, rotate the screwdriver a quarter turn
6.
Step 4, there may still be some friction to overcome as you
Installing and Upgrading Internal Modules in Cisco 2800 Series Routers
Removing the Chassis Cover
Figure 5.
Step 4.
5