Cisco 1905 Instruction Manual

Americas Headquarters:
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
Installing and Upgrading Internal Modules and
FRUs in Cisco 1900 Series ISRs
First Published: May, 14, 2010
OL-22230-01
This document describes how to install or upgrade modules that are located internally within your Cisco
1900 series integrated services router, such as internal modules, memory, internal service modules
(ISMs), power supplies, and blowers. You need to remove the cover from the router to install or remove
any of these items. The document contains the following sections:
Note The Cisco 1905 ISR and Cisco 1921 ISR have no user- removable or user-installable components. Do
not remove the chassis cover.
•Safety Warnings, page 2
•Modules Internal to the Cisco 1905 and 1921 Routers, page 4
•Modules Internal to the Cisco 1905 and 1921 Routers, page 4
•Obtaining Documentation and Submitting a Service Request, page 24
Note To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance
and Safety Information for Cisco 1900 Series Integrated Services Routers document that accompanies
your router.

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Safety Warnings
2
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Safety Warnings
Warning IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. Use the statement number provided at the end of
each warning to locate its translation in the translated safety warnings that accompanied this device.
Statement 1071
SAVE THESE INSTRUCTIONS
Warning No user-serviceable parts inside. Do not open. Statement 1073
Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
Statement 1
Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly
touch the backplane with your hand or any metal tool, or you could shock yourself. Statement 94
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
Warning Read the installation instructions before you connect the system to its power source. Statement 1004
Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
120 Vac, 15A (240Vac, 16A ). Statement 1005
Warning This equipment has been designed for connection to TN and IT power systems. Statement 1007
Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. Statement 1021
Warning To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord. Statement 1023

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Safety Warnings
3
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Warning Hazardous network voltages are present in WAN ports regardless of whether power to the router is
OFF or ON. To avoid electric shock, use caution when working near WAN ports. When detaching
cables, detach the end away from the router first. Statement 1026
Warning Blank faceplates and cover panels serve three important functions: they prevent exposure to
hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI)
that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not
operate the system unless all cards, faceplates, front covers, and rear covers are in place.
Statement
1029
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Warning To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the
handles on modules (such as power supplies, fans, or cards); these types of handles are not designed
to support the weight of the unit. Statement 1032
Warning Do not use this product near water; for example, near a bath tub, wash bowl, kitchen sink or laundry
tub, in a wet basement, or near a swimming pool. Statement 1035
Warning Never install telephone jacks in wet locations unless the jack is specifically designed for
wet locations. Statement 1036
Warning Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface. Statement 1037
Warning Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote
risk of electric shock from lightning. Statement 1038
Warning To report a gas leak, do not use a telephone in the vicinity of the leak. Statement 1039

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1905 and 1921 Routers
4
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Warning Ultimate disposal of this product should be handled according to all national laws and regulations.
Statement 1040
Warning Before opening the unit, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. Statement 1041
Warning This equipment contains a ring signal generator (ringer), which is a source of hazardous voltage. Do
not touch the RJ-11 (phone) port wires (conductors), the conductors of a cable connected to the RJ-11
port, or the associated circuit-board when the ringer is active. The ringer is activated by an incoming
call. Statement 1042
Warning The covers are an integral part of the safety design of the product. Do not operate the unit without the
covers installed. Statement 1077
Warning For connections outside the building where the equipment is installed, the following ports must be
connected through an approved network termination unit with integral circuit protection.
T1 SFP Statement 1044
Safety Warnings for Finland, Norway and Sweden
Warning statement 1017 applies to the countries of Finland, Norway, and Sweden.
Warning This unit is intended for installation in restricted access areas. A restricted access area can be
accessed only through the use of a special tool, lock and key, or other means of security.
Statement 1017
Modules Internal to the Cisco 1905 and 1921 Routers
Warning No user-serviceable parts inside. Do not open. Statement 1073
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
There are no user-serviceable or field replaceable parts in the 1905 and 1921 model routers. For service
and support issues see “Obtaining Documentation and Submitting a Service Request”.

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
5
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
This section tells how to install the field replaceable modules in the Cisco 1941 router. It contains the
following subsections:
•Opening and Closing the Chassis, page 5
•Locating Modules, page 7
•Installing and Removing DRAM UDIMMs, page 8
•Installing and Removing ISMs, page 10
•Installing and Removing a Power Supply, page 15
•Installing a Blower, page 20
•Opening and Closing the Chassis, page 5
•Installing and Replacing CompactFlash Memory Cards
All the module replacement procedures in this section require removal of the chassis cover. Before you
perform any of the module replacement procedures, disconnect the power and remove the cover as
described in the “Opening and Closing the Chassis” section on page 5. After you complete the module
replacement procedures, install the chassis cover as described in the “Opening and Closing the Chassis”
section on page 5.
Opening and Closing the Chassis
To open or close the chassis, follow these steps. A number one Phillips screw driver is required.
Opening the Chassis
Step 1 Make sure that the router is turned off and is disconnected from AC power.
Step 2 Turn the router upside down, and rest the top of the router on a flat surface.
Step 3 Use the Phillips screwdriver to remove the screws that holds the top of the of the case to the chassis, as
shown in Figure 1.

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
6
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Figure 1 Removing the Chassis Screw
Note If the Cisco 1941 ISR has wireless antennas (Figure 2), you must first remove these by
unscrewing them counter clockwise.
Figure 2 Removing Wireless Antennas
Step 4 Turn the router back to its original position (top up).
Step 5 Pull the top of the router (which is facing up toward you) back from the bottom of the router.
1Router cover fastening screws (4)
DO NOT REMOVE DURING
NETWORK OPERATION
DO NOT REMOVE DURING
NETWORK OPERATION
251367
1Wireless antennas
GHz
SYS ACT POE WL AN
2.4
5
199583
1
Cisco 1900 Series

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
7
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Closing the Chassis
Step 1 Make sure that the router is turned off and is disconnected from AC power.
Step 2 Slide the top of the router (which is facing up toward you) back onto the bottom of the router.
Step 3 Turn the router upside down, and rest the top of the router on a flat surface.
Step 4 Use the Phillips screwdriver to install the screws that hold the top of the of the case to the chassis, as
shown in Figure 1. Torque the screws to 6 to 8 in-lb (0.68 to 0.90 N-m).
Step 5 Turn the router back to its original position (top up).
Step 6 Reconnect the AC power.
Locating Modules
Figure 3 shows where the locations of the ISM, unbuffered dual inline memory module (UDIMM),
power supply and blower located in the Cisco 1941 chassis.
Figure 3 Cisco 1941 Internal Modules
1ISM1
1. In the 1941W this is a WLAN module. It is not a user removable or installable.
2UDIMM
3Blower 4Power supply
251368
2
1
4
3

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.)
250944
1

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
9
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Figure 5 Removing a DRAM UDIMM
Step 4 Place the UDIMM in an antistatic bag to protect it from ESD damage.
Installing a DRAM UDIMM
To install a DRAM UDIMM in a Cisco 1900 series router follow these steps:
Step 1 Remove the cover to gain access to the system board. If necessary see the “Opening and Closing the
Chassis” section on page 5.
Step 2 Locate the DRAM UDIMM connector on the system board. See the “Locating Modules” section on
page 7, for the location of the UDIMM connectors.
Step 3 Make sure that both latches on the UDIMM connector are in the open position.
Step 4 Orient the UDIMM so that the polarization notch lines up with the polarization key on the connector.
(See Figure 4.)
Step 5 Insert the UDIMM carefully into the connector.
Step 6 Carefully and firmly press the DRAM UDIMM into the connector until the latches close onto the
UDIMM. Make sure that both latches rotate to the closed position against the UDIMM. (See Figure 6.)
250945

Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Modules Internal to the Cisco 1941 Router
10
Installing and Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs
Figure 6 Installing a DRAM UDIMM
Step 7 When you finish installing modules, install the cover on the router. If necessary see the “Opening and
Closing the Chassis” section on page 5.
Installing and Removing ISMs
Internal Service Modules (ISMs) plug into an ISM connector on the system board as described in the
“Installing an ISM” section on page 12.
Before you remove or install an ISM, remove the chassis cover as described in the “Opening and Closing
the Chassis” section on page 5.
Note In the 1941W a WLAN module is installed in the ISM connector. It is not user removable.
Caution When you remove or install an ISM, 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 ISMs by the edges only. ISMs are ESD-sensitive components and can be damaged by
mishandling.
250946