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Modules Internal to the Cisco 1941 Router

Do not, under any circumstances, tamper with or attempt to remove the safety shields protecting the

Caution

WIC/HWIC slots and connectors.

Installing and Removing DRAM UDIMMs

Before you remove or install a DRAM UDIMM, remove the chassis cover as described in the

and Closing the Chassis" section on page

Caution

When you remove or install UDIMMs, always wear 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 part of the

chassis.

Handle DRAM UDIMMs by the edges only. UDIMMs are ESD-sensitive components and can be

Caution

damaged by mishandling.

DRAM UDIMM Location and Orientation

On Cisco 1900 series routers, a single DRAM UDIMM socket is located on the system board. See

Figure 3

DRAM UDIMMs have a polarization notch on the mating edge to prevent incorrect insertion.

shows the polarization notch on a DRAM UDIMM.

Figure 4

Removing a DRAM UDIMM

To remove a DRAM UDIMM from the system board, follow these steps:

Remove the cover to access the system board. If necessary see the

Step 1

section on page

Locate the DRAM UDIMM on the system board. See the

Step 2

location of the UDIMM sockets.

Step 3

Pull the latches away from the DRAM UDIMM at both ends; this lifts the UDIMM slightly. Then pull

the UDIMM out of the socket. (See

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs

for the location of the UDIMM connector.

DRAM UDIMM Showing Polarization Notch

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs

"Locating Modules" section on page 7

Figure

5.)

"Opening and Closing the Chassis"

"Opening

Figure 4

for the