Maintaining and Upgrading the Router 5-11
Memory Replacement Procedures
Installing Main Memory SIMMs
Follow this procedure to install main memory SIMMs.
Step 1 Put on an ESD-preventive wrist strap and ensure that it makes good contact with your skin.
Connect the equipment end of the wrist strap to the metal back plate of the chassis, avoiding
contact with the connectors.
Step 2 On the motherboard, locate the main memory SIMM card sockets shown in the upper right
corner of Figure 5-5 for the Cisco 4000-M and Figure 5-6 for the Cisco 4500-M and
Cisco 4700. All of the sockets should be empty. If not, follow the steps in the section
“Removing Main Memory SIMMS” earlier in this chapter.
Caution Handle SIMMs by the card edges only. SIMMs are ESD-sensitive components and can be
damaged by mishandling.
Step 3 Hold the SIMM with the polarization notch on the right and the component side away from
you with the connector edge at the bottom. (See Figure 5-7.)
Step 4 Beginning with the SIMM nearest the edge of the motherboard, insert the main memory
SIMM card at a 45-degree angle and rock it into its vertical position (see Figure 5-9), using
the minimum amount of force required. When the SIMM is properly seated, the socket
guide posts will insert through the alignment holes, and the connector springs will click into
place.
Step 5 Ensure that each SIMM is straight and that the alignment holes (as shown in Figure 5-9)
line up with the plastic socket guides on the socket.
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