Table Of Contents
Cisco 12012 Gigabit Switch Router Air Filter Assembly Replacement and Upgrade Instructions
Product Numbers: GSR12-FLT-UPG =, GSR12-FLTR-ENH =
Document Order Number: DOC-7811554=
This document provides information for removing the GSR air filter assembly, which consists of the air filter and air filter tray, and replacing the assembly with an upgraded air filter and air filter tray assembly. This document contains the following sections:
Use this document in conjunction with the "Cisco 12012 GSR Installation and Configuration Guide", (Document Number 78-4331-xx) that supports your Cisco 12012 Gigabit Switch Router and the "Cisco12012 Gigabit Switch Router Air Filter Upgrade Supplement" (Document Number 78-11633-xx) which is provided with this document.
Installation Safety and ESD Precautions
Before installing or removing an air filter assembly, 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 need to perform the remove and install procedures.
Required Tools and Parts
You will need the following tools and parts to remove the existing air filter assembly and install the replacement air filter assembly:
•Number 1 Phillips screwdriver
•M3 Phillips, pan head screws
•3/16-inch flat-blade screwdriver
•ESD-preventive wrist strap
•Air Filter Assembly — GSR12-FLT-UPG =
•Air Filter — GSR12-FLTR-ENH =
Note Save the five screws when removing the installed air filter tray, they will be used to secure the replacement air filter tray to the chassis.
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 near or with the router's electrical and electronic components.
•Always disconnect all power cords and line card interface cables before working on the equipment.
•Keep tools and router components away from walkway areas.
•Do not work alone if potentially hazardous conditions exist in the work area.
•Do not take any action that poses a potential hazard to yourself, other personnel, or the equipment.
•Carefully examine your work area for potential hazards, such as damp floors, ungrounded power extension cables, and missing safety grounds.
Safety with Electricity
Although the air filter assembly upgrade does not require electrical power, it is safe to observe the following basic safety guidelines when working near or with the router's electrical and electronic equipment:
•Before beginning any procedure requiring access to the card cages or other interior router components, locate the emergency power-off switch for the room in which you will be working.
•Do not work alone if potentially hazardous conditions exist in your work area.
•Never assume that power has been disconnected from a circuit; always verify that power has been removed.
•Do not perform any action that poses a potential hazard to yourself, other personnel, or the equipment.
•Carefully examine your work area for possible hazards, such as damp floors, ungrounded power extension cables, and missing safety grounds.
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.
•Never install telephone jacks in wet or damp locations unless the jack is specifically designed for use in such areas.
•Never touch uninsulated telephone wires or terminals unless telephone lines are disconnected at the network interface.
•Use caution when installing or modifying telephone lines.
Preventing Electrostatic Discharge Damage
Electrostatic discharge 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:
•Always use an ESD-preventive wrist strap and ensure that the strap makes adequate contact with your skin. Insert the equipment end of the wrist strap (the banana jack) into the ESD socket on the upper left edge of the card cage. See Figure 1
•The wrist strap protects equipment from ESD voltages on the body only; ESD voltages on clothing can still cause damage to electronic components.
Caution For safety, periodically check the resistance value of the antistatic wrist strap. The resistance measurement should be between 1 and 10 megohms.
Attaching the ESD-Preventive Strap
Attach the electrostatic discharge (ESD) antistatic strap to your body and the Cisco 12012 Gigabit Switch Router (GSR) chassis. See Figure 1.
Figure 1 Connecting an ESD-Preventive strap to the GSR Chassis
Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may harm you. A warning symbol precedes each warning statement. The following paragraph is an example of a safety warning. It identifies the warning symbol and associates it with a bodily injury hazard. The remaining paragraphs in this section are translations of the initial safety warning.
Removing the Air Filter Assembly
This procedure guides you through removing the air filter assembly.
Removing the Air Filter
This procedure guides you through the removal of the air filter from the air filter tray.
Warning To prevent damage, do not place any tools on the air filter tray or inside the card cage. Laying tools inside either the card cage or on the air filter tray could restrict the air flow and cause an overtemperature condition in the Cisco 12012.
Step 1 Attach an antistatic wrist strap to yourself and to one of the two ESD connection sockets located on the front edges of the card cage or to bare metal on the card cage frame. See Figure 1
Step 2 Use the 3/16-inch flat-blade screwdriver to loosen the two captive screws on the air filter tray.
Figure 2 Removing the Air Filter from the Air Filter Tray
Step 4 An indentation on each side of the air filter tray holds the air filter inside the tray. Grasp the air filter with your fingers and gently pull it out of the air filter tray. See Figure 2.
Warning There might be exposed line or fabric cards. Extreme caution is advised when working around an open card cage.
Step 5 Set the air filter aside.
Step 6 Close the air filter tray and use finger pressure only to tighten the two captive screws to the chassis.
Removing the Air Filter Tray
This procedure guides you through removing the air filter tray.
Step 1 Use the number 1 Phillips screwdriver to remove the five screws used to attach the bottom hinge of the air filter tray to the chassis. See Figure 3.
Step 2 Put the screws in a safe place away from the card cage.
Figure 3 Removing the Screws from the Air Filter Tray
Note Hold the air filter tray firmly with one hand because it will be completely disconnected from the chassis.
Step 3 Loosen the two captive screws at the top of the air filter tray until it is no longer attached to the card cage and chassis.
Step 4 Move the air filter tray away from the front of the card cage and chassis so that any dislodged dust will not be drawn into the card cage.
Step 5 Set the air filter tray out of the way.
Installing the Air Filter Assembly
This procedure guides you through installing the air filter assembly for the Cisco 12012 Gigabit Switch Router.
Note Your antistatic wrist strap should still be attached. If not, reattach the antistatic strap for ESD protection. See Figure 1
Installing the Air Filter Tray
This procedure guides you through attaching the air filter tray to the chassis. The air filter tray is open on all sides and the bottom to increase the cooling capacity of the Cisco 12012 Gigabit Switch Router.
Step 1 While holding the air filter tray firmly with one hand, ensure that the five holes in the hinge, located at the bottom of the air filter tray, align with the holes in the chassis; then use finger pressure only to tighten the two captive screws at the top of the air filter tray. See Figure 4.
Figure 4 Air Filter Hinge Holes and Chassis Holes Alignment
Step 2 Use the number 1 Phillips screwdriver and all five of the screws you saved earlier to fasten the bottom hinge of the air filter tray to the chassis.
Step 3 After tightening all five screws, give each screw an additional one quarter turn to ensure a tight seal between the air filter tray and the chassis.
Installing the Air Filter in the Air Filter Tray
This procedure guides you through installing the air filter into the air filter tray.
Step 1 Loosen the two captive screws at the top of the air filter tray. See Figure 4.
Step 2 Allow the bottom hinge to hold the air filter tray in the full open position.
Step 3 With the air filter tray in the full open position, gently slide the air filter into the air filter tray until it is firmly seated against the bottom of the air filter tray. See Figure 5.
Figure 5 Installing the Air Filter in the Air Filter Tray
Caution The air filter must be seated against the bottom of the air filter tray, with the filter fabric facing downward, toward the floor, and the open side of the filter facing upward. See Figure 5.
Attaching the Air Filter Tray
This procedure guides you through attaching the air filter tray to the chassis.
Step 1 Raise the air filter tray until it touches the chassis.
Step 2 With one hand apply pressure to the top of the air filter tray. While holding the pressure, use the 3/16-inch flat-blade screwdriver to tighten the captive screws to ensure a good seal of the air filter tray against the chassis.
Step 3 After tightening both captive screws with the 3/16-inch flat-blade screwdriver, give each screws an additional one quarter turn to ensure a tight seal between the air filter tray and the chassis.
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