Table Of Contents
Replacing Memory Components
Removing the Chassis Cover
Required Tools
Safety Recommendations
Chassis Cover Removal
Replacing the Compact Flash
Replacing DIMMs
Required Tools and Equipment
Replacing the DIMM
Replacing the Chassis Cover
Required Tools and Equipment
Chassis Cover Replacement
Replacing Memory Components
This appendix contains procedures on how to replace memory components in the Cisco AS5350XM universal gateway field-replaceable units. The appendix contains the following sections:
•
Removing the Chassis Cover
•Replacing the Compact Flash
•Replacing DIMMs
•Replacing the Chassis Cover
Removing the Chassis Cover
This section describes how to open the chassis by removing the chassis cover.
Required Tools
You need the following tools:
•Medium Phillips screwdriver
•Small or medium flat-blade screwdriver
Safety Recommendations
Note the following safety recommendations:
Warning Before opening the unit, disconnect the telephone-network cables to avoid contact with telephone-network voltages. Statement 1041
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. Statement 12
NVRAM in the universal gateway uses an internal lithium battery to maintain data. Although this is not a field-serviceable component, we are required to provide the following safety warnings:
Warning There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Statement 1015
Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43
Chassis Cover Removal
You must open the universal gateway chassis to gain access to its interior components: boot read-only memory (ROM) software, synchronous dynamic random-access memory, dual in-line memory (SDRAM DIMMs) modules. (When you replace the boot ROM, you must also remove all feature cards in the chassis.)
To remove the chassis cover, follow this procedure:
Step 1 Turn the power switch on the universal gateway off and disconnect site power.
Step 2 Remove all interface cables from the rear panel of the universal gateway.
Step 3 Place the gateway so that the front panel is facing you.
Step 4 Remove the five screws on the chassis cover, as shown in Figure A-1.
Figure A-1 Removing the Chassis Cover Screws
Step 5 Gently pry the cover off with a flat-blade screwdriver. Lift the chassis cover upward, as shown in Figure A-2, and pull it away from the tabs on the rear of the chassis.
Figure A-2 Removing the Chassis Cover
Replacing the Compact Flash
To replace the compact flash, follow these steps:
Step 1 Turn the power switch off and disconnect site power.
For DC-powered units, note the following warnings:
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003
Warning Before connecting or disconnecting ground or power wires to the chassis, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. Statement 140
Warning Before opening the unit, disconnect the telephone-network cables to avoid contact with telephone-network voltages. Statement 1041
Step 2 Remove all interface cables from the DFCs.
Step 3 Attach an ESD-preventive wrist strap.
Step 4 Remove the chassis cover. (See the instructions in the "Removing the Chassis Cover" section.)
Step 5 Locate the compact flash on the system board. (See Figure A-3.)
Figure A-3 Memory Locations
1
|
Backplane connector
|
2
|
System board DFC connector
|
3
|
AUX
|
4
|
CON
|
5
|
GE1
|
6
|
GE0
|
7
|
BITS port
|
8
|
Alarm port
|
9
|
2T serial interface
|
10
|
Compact flash
|
11
|
DIMM slot
|
12
|
32-bit PCI interface
|
Step 6 Using your fingers, gently extract the old compact flash and set it on a nonconductive surface. Do not use excessive force, because the socket might break.
Step 7 Insert the new compact flash into the socket. Be careful not to bend or crush any of the bottom pins. If necessary, use needlenose pliers to straighten out any bent pins.
Step 8 Replace the chassis cover. (See the instructions in the "Replacing the Chassis Cover" section.)
Step 9 Power up the universal gateway. If error messages relating to memory are displayed, remove the new compact flash and reinstall it, taking care to seat the compact flash firmly in the socket.
Replacing DIMMs
This section describes how to replace a DIMM on the Cisco AS5350XM universal gateway. The universal gateway has a single DIMM (see Figure A-4). The default factory configuration is a 512 MB double data rate (DDR1) SDRAM DIMM.
You might need to upgrade the DIMM for the following reasons:
•You have upgraded to a new Cisco IOS feature set or release that requires more memory.
•You are using very large routing tables or many protocols (for example, when the universal gateway is set up as a connection device between large external networks and your internal network).
Required Tools and Equipment
You need the following tools and equipment:
•ESD-preventive wrist strap
•Appropriate DIMM
Replacing the DIMM
To replace the DIMM, follow this procedure:
Step 1 Power down the universal gateway and disconnect site power.
For DC-powered units only, note the following warning.
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003
Warning Before connecting or disconnecting ground or power wires to the chassis, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. Statement 140
Warning Before opening the unit, disconnect the telephone-network cables to avoid contact with telephone-network voltages. Statement 1041
Step 2 Remove all interface cables from the rear panel of the universal gateway.
Step 3 Attach an ESD-preventive wrist strap.
Step 4 Remove the chassis cover. (See the instructions in the "Removing the Chassis Cover" section.)
Step 5 Use Figure A-3 to locate the DIMM you are replacing.
Step 6 Pull the socket latches away from the DIMM, and then pull the DIMM out of the socket. (See Figure A-4.) The latches hold the DIMM tightly, so be careful not to break the socket.
Caution To prevent damage, do not press on the center of the DIMM. Handle the DIMM carefully.
Figure A-4 Removing and Replacing the DIMM
Step 7 Position the new DIMM so that the polarization notch is located at the right end of the DIMM socket.
Step 8 Insert the new DIMM by sliding the end with the metal fingers into the DIMM socket, as shown in Figure A-5.
Figure A-5 Inserting the New DIMM into the Socket
Step 9 Snap the latches into place. Do not use excessive force, because the socket might break.
Step 10 Replace the gateway chassis cover. (See the "Replacing the Chassis Cover" section.)
Step 11 Power on the universal gateway. If error messages relating to memory are displayed, remove the DIMM and reinstall it, taking care to seat the DIMM firmly in its socket.
Replacing the Chassis Cover
This section describes the procedure for replacing the chassis cover.
Required Tools and Equipment
•Medium Phillips screwdriver
•Five screws
Chassis Cover Replacement
To replace the chassis cover, follow this procedure:
Step 1 Place the chassis bottom so that the front panel is facing you. (See Figure A-6.)
Figure A-6 Replacing the Chassis Cover
Step 2 Hold the chassis cover over the chassis bottom, and align each of the cover tabs with the chassis tabs at the top rear of the chassis.
Step 3 Lower the front of the top cover to close the chassis, and ensure the following:
•The chassis cover tabs fit under the edge of the chassis rear panel so that they are not exposed.
•The chassis tabs fit under the chassis cover so that they are not exposed.
•The chassis cover side tabs on both sides fit inside the chassis side panels so that they are not exposed.
When the chassis cover is properly assembled, no tabs are visible. (See Figure A-7.)
Figure A-7 Cisco AS5350XM Chassis
Step 4 Secure the chassis cover with five screws.
Step 5 Reinstall the chassis on a rack, desktop, or table.
Step 6 Reinstall all interface cables.
Step 7 Reconnect the AC power cord to the power supply.
Step 8 Power up the universal gateway.
The internal power supply fan should power up.
