Installation guide

Upgrading Memory in Cisco 4000 Series Routers 23
Upgrading Main Memory
Figure 18 Removing Main Memory SIMMs (All Other Routers)
Installing Main-Memory SIMMs
Follow these steps to install main-memory SIMMs:
Step 1 Find the main-memory SIMM sockets on the router’s motherboard, as shown in
Figure 12, Figure 13, Figure 14, or Figure 15. All sockets should be empty. If they are
not, follow the steps in the previous section, “Removing Main-Memory SIMMs.”
Caution Handle SIMMs by the card edges only. SIMMs are ESD-sensitive components and can be
damaged by mishandling.
Step 2 Hold the SIMM with the connector edge at the bottom and the polarization notch toward
the rear of the router.
Step 3 Beginning with the socket farthest from the edge of the motherboard in the Cisco 4000,
and the socket nearest the edge of the motherboard in all other routers, insert the SIMM
at an angle, tilted toward the right side in the Cisco 4000, as viewed from the front of the
router (see Figure 19), and toward the left side in all other routers (see Figure 20). Rock
it into a vertical position, using the minimum amount of force required. When the SIMM
is properly seated, the socket guide posts fit through the alignment holes, and the spring
clips click into place.
Step 4 Ensure that the SIMM is straight and that the alignment holes line up with the plastic
guides on the socket. It is normal to feel some resistance, but do not use excessive force
on the SIMM, and do not touch the surface components.
Step 5 Repeat Step 2 through Step 4 for each main-memory SIMM.
If you are finished upgrading memory, continue with the section “Installing the Flash EPROM Card
(Cisco 4000 Router Only)” later in this document for a Cisco 4000 router, or the section “Replacing
the Component Tray” for any other model.
Top view
Front of chassis
H9408
2. Push the top of the
SIMM forward.
1. Pull the locking
spring clips outward.
SIMM
polarization
notch