|
|
Product Numbers: GSR8-SYSBLOWER= and GSR8-PWRBLOWER=
This document provides instructions for replacing the fan trays used in the Cisco 12008 Gigabit Switch Router (GSR). The document contains the following sections:
Use this document in conjunction with the Cisco 12008 Gigabit Switch Router Installation and Configuration Guide (document number 78-4953-xx), which shipped with your Cisco 12008 Gigabit Switch Router.
Before installing or removing a fan tray, review the safety guidelines in this section to prevent injury to yourself or damage to the equipment. This section also lists the tools and parts that you will you need to perform the installation/removal procedure.
Observe the following guidelines to ensure your safety and protect the equipment. This list does not identify all of the potentially hazardous situations that you may encounter in the workplace, so be alert and exercise care when you are working with the router's electrical and electronic components.
Observe the following basic safety guidelines when working with the router's electrical and electronic equipment:
In addition, observe the following guidelines when you are working with equipment connected to telephone wiring or other network cabling.
 | Warning Do not work on the system or connect or disconnect cables during lightning storms. |
Electrostatic discharge (ESD) damage to circuit boards can occur if they are handled improperly. Such mishandling can result in intermittent or complete failures of the board.
When handling circuit boards, observe the following guidelines to prevent ESD damage:
 | Caution For safety, periodically check the resistance value of the antistatic wrist strap. The resistance measurement should be between 1 and 10 megohms. |
You need the following tools and parts if you want to install or replace a fan tray:
This section presents the procedures for removing, installing, and verifying the installation of the fan trays in a Cisco 12008.
The Cisco 12008 supports online insertion and removal of field-replaceable units (FRUs); thus, you can remove and replace a fan tray while the rest of the system remains powered up and fully operational.
| Caution If you intend to replace a defective fan tray while the Cisco 12008 remains powered on, you should quickly remove and replace the defective fan tray to minimize the risk of overheating system components. The system shuts down approximately 2 minutes after reaching the shutdown temperature threshold; therefore, replacement needs to take place within this time frame. |
To remove the fan tray from the lower card cage, perform the following steps.
Step 1 Loosen the two panel fastener screws on each side of the air filter assembly (see Figure 1); remove the assembly to expose the interior of the lower card cage and set it aside.
Step 2 Loosen the two captive installation screws at the sides of the fan tray.
Step 3 With one hand, grasp the ring-shaped insertion/extraction tab in the middle of the fan tray carrier; gently slide the fan tray halfway out of the guide rails to disengage the fan tray connector from the backplane (see Figure 1).
Step 4 Place your free hand beneath the fan tray to support its weight and slide the module completely out of the card cage.
Step 5 Set the fan tray aside.
| Caution This assembly weighs approximately 12 pounds. For safety, use both hands when handling this assembly. |
If you plan to return the removed fan tray to the factory for repair or replacement, repackage the fan tray in the original shipping container, if available, and prepare the package for return shipment.
For the following procedure, it is assumed that you have already removed the defective fan tray from the lower card cage.
To replace the fan tray in the lower card cage, perform the following steps.
| Caution For safety, use both hands when handling this assembly. |
Step 1 With one hand, grasp the ring-shaped insertion/extraction tab in the middle of the new fan tray carrier and raise the front end of the assembly.
Step 2 Place your free hand underneath the assembly to help support its weight; position the assembly in front of the guide rails in the lower card cage.
Step 3 Carefully insert the module into the guiderails (see Figure 2).
Step 4 Using gentle pressure on the insertion/extraction tab, fully insert the module until the sheet metal carrier rests against the stops for the captive installation screws and the mating connector at the back of the module fully inserts into the backplane.
Step 5 Tighten the two captive installation screws at the sides of the fan tray carrier.
Step 6 Restore the air filter assembly to cover the lower card cage and fully enclose the router. Secure the assembly in place by tightening its two panel fastener screws.
To verify that the card cage fan tray is operating properly, go to the section "Checking the Installation of a Fan Tray" on page 10 .
For the following procedure, it is assumed that your Cisco 12008 is equipped with one or two power supplies and a power supply fan tray.
To remove the power supply fan tray, perform the following steps.
Step 1 Loosen the captive installation screw on the honeycomb faceplate of the power supply fan tray (see Figure 3).
Step 2 With one hand, grasp the loosened captive installation screw on the power supply fan tray faceplate; gently pull the fan tray halfway out of the guide rails to disengage the fan tray connector from the backplane (see Figure 3).
Step 3 Using both hands, grasp the fan tray from above and slide the module completely out of the card cage (see Figure 3).
| Caution For safety, make sure that the fans have stopped before grasping the fan tray. |
Step 4 Set the fan tray aside.
If you plan to return the removed fan tray to the factory for repair or replacement, repackage the fan tray in the original shipping container, if available, and prepare the package for return shipment.
For the following procedure, it is assumed that you have already removed the defective fan tray from the power supply bay.
To install the fan tray in the power supply bay, perform the following steps.
Step 1 Using both hands, grasp the the power supply fan tray from above (see Figure 4).
Step 2 Raise the front end of the assembly and position the assembly in front of the guide rails in the power supply bay.
Step 3 Carefully insert the fan tray into the guide rails in the power supply bay (see Figure 4).
Step 4 Using gentle pressure on the edges of the fan tray faceplate, fully insert the module into the bay until the sheet metal carrier of the fan tray rests against the stop for the captive installation screw.
Step 5 Tighten the captive installation screw on the fan tray faceplate (see Figure 4).
To verify that the power supply fan tray is operating properly, go to the following section.
To verify that a replacement fan tray is operating properly, perform the following steps:
Step 1 Check the following components to make sure they are secure:
Step 2 Observe the status LEDs on the CSC faceplate (see "Status LEDs for Fan Trays" on page 10 ).
Step 3 Listen for the sound of the cooling fans in the card cage fan tray and the power supply fan tray. In noisy environments, it may be difficult to hear the fans running.
Step 4 Run your hand along the entire width of the top rear of the router enclosure (see Figure 4) to verify that air is being exhausted from the upper card cage and the power supply bays.
If either fan tray fails to operate properly, ask your Cisco service representative for assistance.
The status LEDs for the fan trays are arranged side-by-side on the clock and scheduler card (CSC) faceplate. The positions of the LEDs correspond to the positions of the fan trays in the Cisco 12008 (see Figure 5). The left LED indicates the status of the card cage fan tray, and the right LED indicates the status of the power supply fan tray. Table 1 lists the status LEDs and describes the significance of each.
| Status LEDs | State | Description |
|---|---|---|
| Left LED | On (amber) | Indicates that a fault exists in the card cage fan tray |
| Right LED) | On (amber) | Indicates that a fault exists in the power supply fan tray |
| Both LEDs | Off | Indicates that both fan trays are operating normally |
If a fan in one of the fan trays fails, the following events occur:
You can check the status of the LEDs by using the show environment leds privileged EXEC command. You can check the status of the fan trays by using the show environment all privileged EXEC command.
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
|
|