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This appendix contains information on how to replace the power supply for the access server field-replaceable units. The appendix contains the following sections:
Note the following safety recommendations:
 | Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages. |
| Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
| Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is off and the power cord is connected. For systems without a power switch, line voltages are present within the power supply when the power cord is connected. |
| 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. |
| 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. |
| Warning Only trained and qualified service personnel should be allowed to install or replace this equipment. |
 | Caution Before opening the chassis, ensure that you have discharged all static electricity from your body and be sure that the power is OFF. |
You need the following tools and equipment:
You must open the access server chassis to gain access to its interior components: boot read-only memory (ROM) software, dynamic random-access memory (DRAM) SIMMs, and Flash memory SIMMs. (When you replace the boot ROMs, you must also remove all feature cards in the chassis.)
Take these steps:
Step 1 Turn the power switch on the access server OFF and disconnect site power. (Note that the power switch is part of the power supply.)
Step 2 If using a DC-powered unit, refer to Figure C-1 and complete steps a to d.
| Warning Before performing any of the following procedures, 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. |
(a) Loosen the three locking screws for the negative, positive, and ground connectors on the DC power supply terminal block.
(b) Remove the -48 VDC wire from the terminal block negative connector (-).
(c) Remove the +48 VDC wire from the terminal block positive connector (+).
(d) Remove the safety ground (green wire) from the terminal block ground connector.
Step 3 Remove all interface cables from the rear panel of the access server.
Step 4 Place the access server so that the front panel is facing you.
Step 5 Remove the four screws on the chassis cover, as shown in Figure C-2.
Step 6 Lift the chassis cover upward, as shown in Figure C-3, and pull it away from the tabs on the rear of the chassis.
Step 7 Continue with the following section, "Removing the Old Power Supply."
This section describes how to remove the power supply. Note the following safety warnings before you remove the power supply:
| Warning Ultimate disposal of this product should be handled according to all national laws and regulations. |
| Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
| Warning Read the installation instructions before you connect the system to its power source. |
| Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord. |
| 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. |
To remove the power supply:
Step 1 Place the access server so that the rear panel is facing you.
Step 2 Remove the three mounting screws that secure the power supply to the chassis and set them aside. (See Figure C-4.)
Step 3 Turn the access server so that the front panel is facing you.
Step 4 Lift the air separator out of the chassis. (See Figure C-5.)
Step 5 Pull the fan closest to the power supply away from the sheet metal tabs. (See Figure C-6.)
Step 6 Lift the fan out of the chassis as shown in Figure C-7, and set the fan on top of the power supply.
Step 7 Depress the tab as shown in Figure C-8.
 | Caution You can damage the fan cables by applying stress if the connector is not removed properly |
Step 8 Disconnect the fan cable as shown in Figure C-8, and set aside the fan.
| Caution Do not attempt to remove the fan cables without first depressing the tab as shown in Figure C-8. You can damage the fan cables by applying stress if the connector is not removed properly. |
Step 9 Remove the next fan and disconnect its cable.
Step 10 Remove the cables for the two remaining fans. You can disconnect these cables without removing the fans.
Step 11 Disconnect the power connectors from the backplane as shown in Figure C-9. First disconnect the 2-pin 12V connector, then disconnect the power connector's 4-jack harness.
Step 12 Slide the power supply toward the front panel to disengage the power supply hook from the chassis hook, as shown in Figure C-10. Then remove the power supply from the chassis.
| Warning Ultimate disposal of this product should be handled according to all national laws and regulations. |
Step 13 Continue with one of the following sections:
Take these steps:
Step 1 Place the power supply as shown in Figure C-11, and then slide it toward the rear panel. You will be able to feel the hooks engage.
Step 2 First reconnect the 4-jack harness and then reconnect the 2-pin 12V connector, as shown in Figure C-12. Note that, for clarity, the illustration does not show the fans in place.
| Caution Observe the proper keying of the DC output connector to the back panel connector. Never force the connector because you could damage your Cisco AS5300. |
Step 3 Route the fan cables exactly as shown in Figure C-13. Note that the two longest cables are connected to the two installed fans on the right. The connectors to these two fans will fit into the space between the second and third fans.
Step 4 Insert the middle fan as shown in Figure C-13, making sure that the cable feeds to your left. Position the cables to the two installed fans so that they will fit under the first and second fans. Press the fan into place between the four sheet metal tabs.
Step 5 Reconnect the two 2-pin fan cables as shown in Figure C-14.
Step 6 Reinstall the remaining fan. Make sure you orient the fan so that the cables feed to the right (toward the second fan). Then route the cable completely under the fan before you reconnect it. This takes up the extra length of fan cable and keeps it out of the way.
When correctly assembled, the cables appear as shown in Figure C-15.
Step 7 Replace the air separator as shown in Figure C-16, holding all cables to the right of the separator as you slip it into the chassis.
Step 8 Turn the access server so that you face the rear panel, and then reinstall the three mounting screws as shown in Figure C-17.
Step 9 If you installed a different type of power supply (AC or DC) than was originally installed in the access server, place one of the power ratings labels that arrived in the plastic bag with the documentation directly over the power ratings information on the rear panel. For example, if the original chassis came with an AC power supply and you replaced it with a DC power supply, place the DC power ratings label over the ratings stamped on the rear panel of the chassis. This will ensure that the correct power ratings information appears on the rear panel.
Step 10 Replace the chassis cover as described in the section, "Replacing the Chassis Cover," later in this appendix.
A redundant power supply has two power cords to provide higher reliability and load balancing. Use the redundant power supply to:
To install the redundant power supply:
Step 1 Place the redundant power supply as shown in Figure C-11, then slide it toward the rear panel. You will be able to feel the chassis hook engage with the slot on the bottom of the power supply.
Step 2 Connect the 6-pin connector to the motherboard, as shown in Figure C-19. Note that, for clarity, the illustration does not show the fans in place or the fan cables.
Step 3 Reconnect the power connector's 4-jack harness, then reconnect the 2-pin 12V connector, as shown in Figure C-12.
Step 4 Route the fan cables exactly as shown in Figure C-21. Note that the two longest cables are connected to the two installed fans on the right. The connectors to these two fans will fit into the space between the second and third fans.
Step 5 Insert the second fan as shown in Figure C-21, making sure that the fan cable feeds to your left. Position the cables to the two installed fans so that they will fit under the first and second fans. Press the fan into place between the four sheet metal tabs.
Step 6 Reconnect the two 2-pin fan cables to the remaining fan, as shown in Figure C-22.
Step 7 Reinstall the remaining fan. Make sure you orient the fan so that the cables feed to the right (toward the second fan). Then route the cable completely under the fan before you reconnect it. This takes up the extra length of fan cable and keeps it out of the way.
When correctly assembled, the cables appear as shown in Figure C-23.
Step 8 Replace the air separator as shown in Figure C-24, holding all cables to the right of the separator as you slip it into the chassis.
Step 9 Turn the access server so that you face the rear panel, and then reinstall the three mounting screws as shown in Figure C-25.
Step 10 Replace the chassis cover using the procedures in the following section, "Replacing the Chassis Cover," and then configure your redundant power supply using the procedures in the section, "Configuring the Redundant Power Supply ."
To replace the chassis cover, take these steps:
Step 1 Place the chassis bottom so that the front panel is facing you.
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, as shown in Figure C-26.
Step 3 Lower the front of the top cover to close the chassis, and ensure the following:
When the chassis cover is properly assembled, no tabs are visible, as shown in Figure C-27.
Step 4 Secure the chassis cover with four 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. Or, if using a DC-powered unit, refer to Figure C-28, and then complete steps a to d.
| Caution Do not overtorque the terminal block contact screws. The recommended torque is 8.2 ± 0.4 inch-lb. |
(a) Insert the safety ground (green wire) into the terminal block ground connector and tighten the locking screw. Ensure that no bare wire is exposed.
(b) Insert the +48 VDC wire into the terminal block positive connector (+) and tighten the locking screw. Ensure that no bare wire is exposed.
(c) Insert the -48 VDC wire into the terminal block negative connector (-) and tighten the locking screw. Ensure that no bare wire is exposed.
(d) Make sure the power supply cord is secured to the cable strain-relief clamps on the DC power supply with cable ties.
| Warning After wiring the DC power supply, remove the tape from the circuit breaker switch handle and reinstate power by moving the handle of the circuit breaker to the ON position. |
Step 8 Power ON the access server.
The internal power supply fan should power on. If you are using a redundant power supply, the six green LEDs on the front of the power supply should light. If one LED is not lit, consult the appropriate redundant power supply software message to determine where the problem is located.
Step 9 If you are using a redundant power supply, continue with the following section, "Configuring the Redundant Power Supply ."
The following Cisco IOS releases fully support the redundant power supply, however, you can use the redundant power supply with older releases for load balancing purposes only.
When the Cisco IOS software detects a failure or recovery from the redundant power supply unit, the Cisco IOS software sends an SNMP message to the configured SNMP server. Unlike messages that are sent to the console every minute, only one SNMP message is sent when the failure is first detected and another one is sent when the recovery is detected. Use this section to manage your Cisco AS5300 universal access server to use SNMP traps (messages). If you do not want to implement SNMP traps, skip this section.
| Step | Command | Purpose |
|---|---|---|
| 1 | 5300>enable Password: <password> 5300# | Enter enable mode (also called privileged EXEC mode). Enter the password. You have entered enable mode when the prompt changes to |
| 2 | 5300#configure term | Enter the configuration mode. |
| 3 | 5300(config)#snmp-server enable traps envmon | Begin sending traps that monitor the environment. |
| 4 | 5300(config)#snmp-server host IP address | Configure the CiscoAS5300 to send SNMP traps to the configured IP address, and the defined the community string, in the SNMP trap. |
| 5 | 5300(config)#exit | Exit the configuration mode. |
| 6 | 5300#write memory | Save the configuration to NVRAM. |
To verify you have enabled sending SNP traps for Redundant Power Supply events:
5300# show running-config Building configuration... Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname as5300 ! ip subnet-zero ! ! interface Ethernet0 ip address 1.16.44.23 255.255.255.0 no ip directed-broadcast ! interface FastEthernet0 no ip address no ip directed-broadcast shutdown ! ip classless ip route 0.0.0.0 0.0.0.0 Ethernet0 ip route 223.255.254.0 255.255.255.0 Ethernet0 ! snmp-server community public RO snmp-server enable traps snmp snmp-server enable traps isdn call-information snmp-server enable traps config snmp-server enable traps entity snmp-server enable traps envmon snmp-server enable traps bgp snmp-server enable traps frame-relay snmp-server enable traps syslog snmp-server host 172.22.19.7 traps public ! line con 0 transport input none line aux 0 line vty 0 4 login ! end
If you are having trouble:
To display the current status of the Redundant Power Supply unit (if present):
5300# show environment Power Supply:Redundant Power System is present. RPS Input Voltage status: normal RPS Output Voltage status: normal RPS Fan status: normal RPS Thermal status: normal RPS OverVoltage status: normal
Board Temperature:normal
5300#
Posted: Thu Apr 1 14:44:59 PST 1999
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