Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
8
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Caution
Do not
, under any circumstances, tamper with or attempt to remove the safety shields protecting the
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
“Opening
and Closing the Chassis” section on page 5
.
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.
Caution
Handle DRAM UDIMMs by the edges only. UDIMMs are ESD-sensitive components and can be
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
for the location of the UDIMM connector.
DRAM UDIMMs have a polarization notch on the mating edge to prevent incorrect insertion.
Figure 4
shows the polarization notch on a DRAM UDIMM.
Figure 4
DRAM UDIMM Showing Polarization Notch
Removing a DRAM UDIMM
To remove a DRAM UDIMM from the system board, follow these steps:
Step 1
Remove the cover to access the system board. If necessary see the
“Opening and Closing the Chassis”
section on page 5
.
Step 2
Locate the DRAM UDIMM on the system board. See the
“Locating Modules” section on page 7
for the
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
Figure 5
.)
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