Before performing this task, open the front (PLIM) side cosmetic doors, if installed.

You need the following tools to perform this task:

• ESD-preventive wrist strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver

To remove a switch fabric card, see the image below and perform the following steps:

Note	In the switch fabric card removal image below, an Impedance Carrier is shown. Refer to image FQ123 -140G Switch Fabric Card above for an example of the actual switch fabric card.

Figure 2. Removing a Switch Fabric Card

1	Captive screw	3	Direction of installation or removal
2	Ejector lever

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Identify the switch fabric card to be removed from the card cage. Use the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to turn the two captive screws on the front panel of the card counterclockwise to loosen it from the slot.

3.    Grasp the two card ejector levers and simultaneously pivot both ejector levers 90 degrees (70 degrees for a newer switch fabric card) away from the front edge of the card carrier to unseat the card from the midplane connector.

4.    Touching only the metal card carrier, slide the card from the slot and place it directly into an antistatic sack or other ESD-preventive container. If you plan to return the defective card to the factory, repackage it in its original shipping container.

After performing this task, close the front (PLIM) side cosmetic doors, if installed. If you need to install a new switch fabric card, see the Installing a Switch Fabric Card.

Before performing this task, open the cosmetic doors, if installed.

Caution

Do not use the faceplate bracket to pull a line card from the slot; you could cause serious damage to the line card.

Caution

Remove or install only one modular services card at a time. Allow at least 15 seconds for the router to complete the preceding tasks before removing or installing another modular services card. The router may indicate a hardware failure if you do not follow proper procedures.

You need the following tools and part to perform this task:

• ESD-preventive strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver
• MSC Impedance carrier (Cisco product number: CRS-MSC-IMPEDANCE=)

To remove a line card, see the image below and perform the following steps:

Figure 3. Removing a Modular Services Card

1	Captive screw	3	Direction of installation or removal
2	Ejector lever

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Use a number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to loosen the captive screw next to each line card ejector lever.

3.    Simultaneously pivot the ejector levers away from the faceplate to release the line card from the midplane connectors.

4.    Grasp the ejector levers with both hands and gently pull the line card halfway from the slot. Do not use the bracket to pull the line card from the slot.

5.    Move one hand under the line card to guide it. Avoid touching the line card printed circuit board, components, or any connector pins.

6.    Place the removed line card on an antistatic mat, or immediately place it in an antistatic bag if you plan to return it to the factory.

7.    If the line card slot is to remain empty, install an MSC impedance carrier to keep dust out of the chassis and to maintain proper airflow through the line card compartment.

8.    Use a number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to tighten the captive screws next to each impedance carrier ejector lever to ensure proper EMI shielding and maintain proper airflow throughout the chassis.

After performing this task, close the rear (MSC) side cosmetic doors, if installed. If you need to install a new MSC, FP, or LSP Line Card, see the Installing an MSC, FP, or LSP Line Card.

Before performing this task, open the front (PLIM) side cosmetic doors, if installed.

You need the following tools to perform this task:

• ESD-preventive wrist strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver

To remove a Cisco CRS Series Enhanced 16-Slot Line Card Chassis fan controller card, see the image below and perform the following steps:

Figure 4. Removing a Cisco CRS Series Enhanced 16-Slot Line Card Chassis Fan Controller Card

1	Captive screw	3	Direction of installation or removal
2	Ejector lever

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Identify the Cisco CRS Series Enhanced 16-Slot Line Card Chassis fan controller card to be removed from the card cage. Use the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to turn the two captive screws on the front panel of the card counterclockwise to loosen it from the slot.

3.    Grasp the two card ejector levers and simultaneously pivot both ejector levers 90 degrees (70 degrees for a new Cisco CRS Series Enhanced 16-Slot Line Card Chassis fan controller card) away from the front edge of the card carrier to unseat the card from the midplane connector.

4.    Touching only the metal card carrier, slide the card from the slot and place it directly into an antistatic sack or other ESD-preventive container. If you plan to return the defective card to the factory, repackage it in its original packaging.

After performing this task, close the front (PLIM) side cosmetic doors. If you need to install a new fan controller card, see the Installing a Cisco CRS Series Enhanced 16-Slot Line Card Chassis Fan Controller Card.

Because chassis operation may be impacted by the removal of an RP or PRP card, perform these tasks only if one of the following conditions exists:

• When you are certain that the RP card in the chassis is operational and, if not already the Active RP, ready to assume control (this happens automatically)
• When the chassis is undergoing scheduled maintenance
• When the Cisco CRS Series Enhanced 16-Slot Line Card Chassis is powered down

Failure to follow these guidelines can result in interruptions in data communications and network connectivity.

Before performing this task, open the cosmetic doors (if installed).

You need the following tools to perform this task:

• ESD-preventive wrist strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Identify the card to be removed from the card cage. Remove any cables connected to the front panel of the card.

3.    PRP cards only—Before removing a PRP card, you must first push the OIR button (using a pointed object such as a pen), which causes the blue OIR Ready LED to start blinking. When the board is ready for removal, the blue LED glows solidly.

4.    Use the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to turn the two captive screws on the front panel of the card counterclockwise to loosen the card from the slot.

5.    Grasp the two card ejector levers and simultaneously pivot both ejector levers 90 degrees away from the front edge of the card carrier to unseat the card from the backplane connector.

6.    Touching only the metal card carrier, slide the card from the slot and place it directly into an antistatic sack or other ESD-preventive container. If you plan to return the defective card to the factory, repackage it in the shipping container you received with the replacement card.

After performing this task, close the front (PLIM) side cosmetic doors (if installed). If you need to install a new RP, DRP, or PRP card, see the Installing an RP, PRP, or DRP Card.

Before performing this task, open the front (PLIM) side cosmetic doors (if installed).

Caution

The system can indicate a hardware failure if you do not follow proper procedures. Remove or install only one PLIM at a time. Allow at least 15 seconds for the system to complete the preceding tasks before removing or installing another PLIM.

Note	We strongly recommend that you use the Cisco IOS XR shutdown command before removing a PLIM to prevent anomalies when you reinstall a new or reconfigured PLIM.

You need the following tools to perform this task:

• ESD-preventive wrist strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver

To remove a PLIM, see the image below and perform the following steps:

Figure 5. Removing a PLIM

1	Captive screw	3	Direction of installation or removal
2	Ejector lever

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Identify the card to be replaced.

3.    Use the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to loosen the two captive screws holding the card in place.

4.    Grasp the two card ejector levers and simultaneously pivot both ejector levers 90 degrees (70 degrees for a newer PLIM) away from the front edge of the card carrier to unseat the card from the backplane connector.

5.    Touching only the metal card carrier, slide the card from the slot and place it directly into an antistatic sack or other ESD-preventive container.

Some PLIMs contain Class 1 lasers and some contain Class 1M. See the documentation for the specific PLIM for details.

After performing this task, close the front (PLIM) side cosmetic doors (if installed). If you need to install a new PLIM, see Installing a PLIM.

The hard disk should be powered down prior to removal. This reduces the chances of data corruption. To power down the hard disk prior to removal, use the proc mandatory off hd_drv and proc shutdown hd_drv commands.

Before performing this task, open the front (PLIM) side cosmetic doors (if installed).

You need the following tools to perform this task:

• ESD-preventive strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Use the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to loosen the captive screws at the left and right of the hard drive door on the faceplate of the card. If needed, use a number 2 Phillips screwdriver or number 2 common (flat head) screwdriver on the captive screws.

3.    Remove the hard drive door and set it carefully aside.

4.    Press the release button to unseat the hard drive sled from the card.

5.    Carefully pull the hard drive sled from the card.

6.    Place the removed hard drive on an antistatic mat, or immediately place it in an antistatic bag if you plan to return it to the factory.

7.    If the hard drive slot is to remain empty, replace the door to keep dust out, and tighten the captive screws.

Close the front (PLIM) side cosmetic doors (if installed). If you need to install a new hard drive, see the Installing a Card-Based Hard Drive.

Before performing this task, open the front (PLIM) side cosmetic doors (if installed).

You need the following tools to perform this task:

• ESD-preventive strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Using the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver, loosen the captive screw at the bottom of the PCMCIA slot door on the faceplate of the card.

3.    While lifting the hinged PCMCIA slot door up, press the release button for the card slot to disengage the card from the card, and then carefully pull out the far left removable PCMCIA flash card.

4.    Place the removed PCMCIA card on an antistatic mat, or immediately place it in an antistatic bag if you plan to return it to the factory.

5.    If the PCMCIA card slot is to remain empty, close the door to keep dust out, and tighten the captive screw with the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver. Otherwise, install the new PCMCIA card.

Close the front (PLIM) side cosmetic doors (if installed). If you intend to install a new PCMCIA card, see the Installing a PCMCIA Card.

The cable management bracket arrives pre-installed on the chassis. Before performing this task, open the cosmetic doors (if installed) and remove any cables from the bracket.

You need the following tools to perform this task:

• ESD-preventive wrist strap
• Number 2 Phillips screwdriver or number 2 common (flat head) screwdriver

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Use the number 2 Phillips screwdriver or number 2 common (flat head) screwdriver to loosen and remove the four screws holding the bracket to the chassis.

3.    Set the bracket carefully aside.

You may now install a replacement cable management bracket, if necessary. See the Installing a Cable Management Bracket for more information. Close the cosmetic doors (if installed) after replacing the cable management bracket.

The Cisco CRS Series Enhanced 16-Slot Line Card Chassis has two fan trays , one just below the lower card cage and the other just above the upper card cage. The chassis can run with only one fan tray operating. If a failure occurs in one fan tray, the other fan tray acts as the redundant fan tray to assure fault-tolerant system performance; the chassis continues to operate while the failed fan tray is replaced.

The Cisco CRS Series Enhanced 16-Slot Line Card Chassis fan tray operates in either the upper or lower fan tray slots. Each fan tray installs into the rear (MSC) side of the chassis and contains:

• Nine fans
• Fan tray board
• Front-panel status LED

Note	The upper and lower fan trays are interchangeable and installed in the same manner.

Figure 20. Airflow Through the Cisco CRS Series Enhanced 16-Slot Line Card Chassis

The chassis has a serviceable air filter mounted in a slide-out tray accessible from the rear of the chassis just below the lower card cage. The air filter removes dust from the room air drawn into the router by the two fan trays. Once a month (or more often in dusty environments) you should examine the air filter and replace it if it appears damaged or excessively dirty.

This section describes how to replace a fan tray in the Cisco CRS Series Enhanced 16-Slot Line Card Chassis. For information on the fan tray, see the Information About the Air Circulation Components . For complete information on regulatory compliance and safety, see Regulatory Compliance and Safety Information for the Cisco CRS Carrier Routing System .

Figure 21. Fan Tray

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Using the screwdriver, loosen the two captive screws on the fan tray faceplate. If necessary, use a step platform to reach the upper fan tray comfortably.

3.    Pull firmly on the two handles to pull it free; two people are required to remove the fan tray.

4.    Grasp the fan tray handles and pull it straight out to disconnect the fan tray from the connector mounted on the front of the fan tray bay on the rear (MSC) side of the chassis. Slide the fan tray halfway from the fan tray bay.

5.    Use your free hands to support the fan tray, then slide the fan tray completely from the fan tray bay.

6.    Set the fan tray carefully aside.

7.    To install the replacement fan tray using two hands to support it, position the fan tray in front of the fan tray bay (label is on top).

8.    Slide the fan tray into the fan tray bay. Stop when the fan tray makes contact with the chassis connector in the back of the fan tray bay.

9.    Firmly push on the fan tray handles to seat the fan tray connector in the chassis connector. When completely seated, the fan tray faceplate flanges meet the rear (MSC) side of the chassis.

10.    Tighten the two captive screws on the fan tray faceplate.

Step 1	Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.
Step 2	Using the screwdriver, loosen the two captive screws on the fan tray faceplate. If necessary, use a step platform to reach the upper fan tray comfortably. Figure 22. Unscrewing the Screws in the Fan Tray Faceplate
Step 3	Pull firmly on the two handles to pull it free; two people are required to remove the fan tray. Caution    Because of the weight of the fan tray, approximately 37.5 lb. (17 kg), two people are required to remove the fan tray. You should be especially careful while removing the fan tray from the chassis. To prevent injury, keep your back straight and lift with your legs, not your back. Avoid sudden twists or lateral moves. It is safer to use two people to remove the fan tray rather than a single person.
Step 4	Grasp the fan tray handles and pull it straight out to disconnect the fan tray from the connector mounted on the front of the fan tray bay on the rear (MSC) side of the chassis. Slide the fan tray halfway from the fan tray bay.
Step 5	Use your free hands to support the fan tray, then slide the fan tray completely from the fan tray bay.
Step 6	Set the fan tray carefully aside.
Step 7	To install the replacement fan tray using two hands to support it, position the fan tray in front of the fan tray bay (label is on top). Caution    Because of the weight of the fan tray, approximately 37.5 lb. (17 kg), two people are required to replace the fan tray. You should be especially careful while replacing the fan tray into the chassis. To prevent injury, keep your back straight and lift with your legs, not your back. Avoid sudden twists or lateral moves. It is safer to use two people to support the fan tray while replacing it in the fan tray bay rather than a single person.
Step 8	Slide the fan tray into the fan tray bay. Stop when the fan tray makes contact with the chassis connector in the back of the fan tray bay. Caution    To prevent damage to the chassis connector, do not use excessive force when inserting a fan tray into its bay.
Step 9	Firmly push on the fan tray handles to seat the fan tray connector in the chassis connector. When completely seated, the fan tray faceplate flanges meet the rear (MSC) side of the chassis. Note    All electrical and control line connections are made automatically when the connectors mate. The Fan LED will light when the fan tray is inserted.
Step 10	Tighten the two captive screws on the fan tray faceplate.

This section describes how to replace the air filter in the Cisco CRS Series Enhanced 16-Slot Line Card Chassis. For further information, see the Information About the Air Circulation Components. For complete information on regulatory compliance and safety, see Regulatory Compliance and Safety Information for the Cisco CRS Carrier Routing System .

Figure 23. Air Filter

Note	A lattice of wire exists on both sides of the filter material with an arrow denoting airflow direction and a pair of sheet metal straps on the downstream side of the filter assembly.

Before performing this task, you must first remove the upper grille on the front (SFC) side of the chassis, if installed. See the Removing the Upper Grille Support.

You need the following tools to perform this task:

• ESD-preventive wrist strap

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Gently pinch the tab on the left side of the PM slot cover to detach the PM slot cover from the PM slot.

3.    Remove the two tabs on the right side of the PM slot cover from the two holes on the right side of the PM slot.

4.    Set the PM slot cover aside.

Step 1	Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.
Step 2	Gently pinch the tab on the left side of the PM slot cover to detach the PM slot cover from the PM slot.
Step 3	Remove the two tabs on the right side of the PM slot cover from the two holes on the right side of the PM slot.
Step 4	Set the PM slot cover aside. Figure 24. Installing PM Slot Cover

After performing this task, install an AC or DC PM, if necessary. For more information, see Installing a Power Module. Re-install the upper grille on the front (SFC) side of the chassis. If you plan to remove the power shelf completely, you must first remove all of the PM slot covers, PMs, and the alarm module from the power shelf. See the Removing a Power Module and the Removing an Alarm Module for more information.

Before performing this task, you must first remove the upper grille on the front (PLIM) side of the chassis, if installed.

You need the following tools to perform this task:

• ESD-preventive wrist strap
• 6-in. long number 1 Phillips screwdriver

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Using the screwdriver, unscrew the ejector from the PM.

3.    Flip down the ejector. Slide the PM out of the power shelf, and carefully place it down on a flat surface.

Step 1	Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.
Step 2	Using the screwdriver, unscrew the ejector from the PM. Figure 25. Removing the PM from the Power Shelf
Step 3	Flip down the ejector. Slide the PM out of the power shelf, and carefully place it down on a flat surface.

After performing this task, install a replacement AC or DC PM, if necessary (see Installing a Power Module) and re-install the upper grille on the front (SFC) side of the chassis. If you plan to remove the power shelf completely, you must first remove all of the power modules and the alarm module from the power shelf (see Removing an Alarm Module).

Before performing this task, you must first remove the upper grille on the front (SFC) side of the chassis, if installed. See Removing the Front (PLIM) Side Cosmetic Components.

You need the following tools to perform this task:

• ESD-preventive wrist strap
• 6-in. long number 1 Phillips screwdriver

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Use the screwdriver to loosen the captive screw securing the alarm module to the power shelf on the lower right corner of the alarm module.

3.    Rotate the alarm module ejector lever downwards to eject the alarm module from the power shelf.

4.    Slide the alarm module out of the power shelf, and carefully place it down on a flat surface.

Step 1	Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.
Step 2	Use the screwdriver to loosen the captive screw securing the alarm module to the power shelf on the lower right corner of the alarm module.
Step 3	Rotate the alarm module ejector lever downwards to eject the alarm module from the power shelf. Figure 26. Rotating Alarm Module Ejector Downwards to Eject Alarm Module
Step 4	Slide the alarm module out of the power shelf, and carefully place it down on a flat surface.

After performing this task, install a replacement alarm module, if necessary, (see Installing an Alarm Module) and re-install the upper grille on the front (SFC) side of the chassis. If you plan to remove the power shelf completely, remove the AC or DC wiring from the rear of the power shelf (see Removing AC or DC Power Shelf Wiring). If you plan to remove wiring from the lower power shelf, you will need to remove the exhaust air deflector first (see Removing the Exhaust Air Deflector).

There are no prerequisites for this task.

You need the following tools and equipment to perform this task:

• 6-in. long number 2 Phillips screwdriver

1.    Unscrew the captive screw on both sides.

2.    Rotate the air deflector backward until seated on the lower standoff.

3.    Lift the air deflector off of the lower standoff.

Step 1	Unscrew the captive screw on both sides. Figure 27. The Captive Screw
Step 2	Rotate the air deflector backward until seated on the lower standoff. Figure 28. Rotating the Air Deflector Backward
Step 3	Lift the air deflector off of the lower standoff.

After the exhaust air deflector has been removed from the rear of the chassis, remove the AC or DC wiring from the rear of the power shelf. Continue to Installing an AC or DC Power Shelf for instructions.

This section describes how to remove the DC power shelf wiring from the rear of the DC power shelf.

For additional power shelf details, see Cisco CSR-1 Series Carrier Routing System Description or Cisco CRS 16-Slot EC Line Card Chassis Specifications.

Before performing this task, power down and remove DC PMs and the alarm module in the shelf you want to disconnect. Remove the upper grille from the rear (MSC) side of the chassis, if installed. If you plan to remove power from the lower power shelf, remove the exhaust air deflector from the rear of the chassis first. See Removing the Exhaust Air Deflector.

Note	Before removing wiring from the power shelf, make sure that the input power cables are not energized.

You need the following tools to perform this task:

• ESD-preventive wrist strap
• 6-in. long number 1 Phillips screwdriver
• 3/8-in. ratchet wrench with 10-mm socket
• Volt ohm meter

1.    Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets: on the front (PLIM) side of the chassis there is one ESD connection socket right above the fan controllers. On the rear (MSC) side of the chassis there are two ESD connection sockets right above the cable management tray in the center of the chassis (left and right). You can also connect the ESD-preventive wrist strap leash to any bare metal surface on the chassis.

2.    Verify that the power LEDs on the rear of the power shelf are off for all inputs on the power shelf that is being removed.

3.    Using the volt ohm meter, verify that there is no voltage on the cables that are about to be removed.

4.    Use the screwdriver to remove the screw that secures the terminal block cover into the mounting standoff.

5.    Slide the terminal block cover downwards.

6.    Remove the terminal block cover.

7.    Using the 10-mm socket wrench, remove the positive and negative cable pairs from each terminal block.

8.    Replace the terminal block cover.

After you remove the DC terminal block covers and DC wiring, you can remove the power shelf from the chassis completely. See Removing a Power Shelf.

This section describes how to remove input AC cords from the rear of the DC power shelf.

Before performing this task, power down and remove AC PMs and the alarm module in the shelf you want to disconnect. Remove the upper grille from the rear (MSC) side of the chassis, if installed.

Note	Before removing wiring from the power shelf, make sure that the input power cables are not energized.

You need the following tools to perform this task:

• 6-in. long number 1 Phillips screwdriver

1.    Verify that the AC input source breaker is in the OFF position.

2.    Use the screwdriver to loosen the screws that clamp the cords in place.

3.    Remove the cords from the cord clamps.

Step 1	Verify that the AC input source breaker is in the OFF position.
Step 2	Use the screwdriver to loosen the screws that clamp the cords in place. Figure 29. Cord Being Removed from Cord Clamp 1 Screw that secures the cord clamp 2 Cord to be inserted into clamp
Step 3	Remove the cords from the cord clamps.

After you remove the AC cords, you can remove the power shelf from the chassis completely. See Removing a Power Shelf.

Before performing this task, remove the upper grilles from the front (PLIM) and rear (MSC) sides of the chassis (if installed), the AC or DC PMs, alarm module, and the AC or DC input power wiring from the shelf that you want to disconnect. For more information, see the Removing a Power Module, the Removing an Alarm Module , and the Removing AC or DC Power Shelf Wiring .

You need the following tools to perform this task:

• 6 in. long number 2 Phillips screwdriver

Caution

Do not use the handles for lifting or supporting the power shelf, because this could severely damage the handles.

Caution

Do not bend the handles sideways during any part of the removal process.

1.    Using the screwdriver, remove the screws that secure the bottom of the power shelves to the chassis. There is one screw on each side of the power shelf.

2.    Using the screwdriver, loosen the captive screws on the power shelf handles on the power shelf. Each power shelf handle contains one captive screw. The handles will fall down away from the shelf, as shown in the following image.

3.    Grasping both handles simultaneously, pull both the left and right handles down and out at the same time to pull the shelf partially out of the chassis.

4.    When the shelf is partially out of the chassis and the ejector handles are away from the pins, rotate the handles back up to the closed position and hand-tighten the handle screws back into the shelf.

5.    Using two people, one to support the power shelf underneath and the other to keep it steady, slide the shelf out of the chassis, and carefully set it down on a flat surface.

6.    Remove the second power shelf, if necessary, by following step 1 through step 5.

Step 1	Using the screwdriver, remove the screws that secure the bottom of the power shelves to the chassis. There is one screw on each side of the power shelf. Note    If you are removing both power shelves from the chassis, you can remove the power shelves in any order that you prefer. Ensure that the first power shelf is fully removed from the chassis before attempting to remove the second power shelf.
Step 2	Using the screwdriver, loosen the captive screws on the power shelf handles on the power shelf. Each power shelf handle contains one captive screw. The handles will fall down away from the shelf, as shown in the following image. Figure 30. Removing Power Shelf from Chassis
Step 3	Grasping both handles simultaneously, pull both the left and right handles down and out at the same time to pull the shelf partially out of the chassis.
Step 4	When the shelf is partially out of the chassis and the ejector handles are away from the pins, rotate the handles back up to the closed position and hand-tighten the handle screws back into the shelf.
Step 5	Using two people, one to support the power shelf underneath and the other to keep it steady, slide the shelf out of the chassis, and carefully set it down on a flat surface. Caution    Because of the weight of the power shelf, 40 lbs (18 kg), and the height that the power shelf is installed in the chassis, you should be especially careful while lifting and removing the power shelf. To prevent injury, keep your back straight and lift with your legs, not your back. Avoid sudden twists or lateral moves.
Step 6	Remove the second power shelf, if necessary, by following step 1 through step 5.

After performing this task, install a replacement power shelf, if necessary, (see the Installing an AC or DC Power Shelf), and replace the upper grille on the front (PLIM) and rear (MSC) sides of the chassis.

Before performing this task, remove the upper grilles from the front (PLIM) and rear (MSC) sides of the chassis (if installed), the AC or DC PMs, alarm module, and the AC or DC input power wiring, and the power shelves from the chassis. For more information, see the following sections:

You need the following tool to perform this task:

• 6-in. long number 1 Phillips screwdriver

1.    Use the screwdriver to remove the six M4 flat head screws, three on each side, that attach the upper grille support to the chassis.

2.    Remove the upper grille support from the front of the chassis, and set it aside.

Step 1	Use the screwdriver to remove the six M4 flat head screws, three on each side, that attach the upper grille support to the chassis. Figure 31. Removing the Upper Grille Support from the Chassis
Step 2	Remove the upper grille support from the front of the chassis, and set it aside.

Before performing this task, remove the AC or DC input power wiring from both power shelves, and remove both power shelves from the chassis.

Caution

Do not remove the chassis ground cable unless the chassis is being replaced.

You need the following tools and equipment to perform this task:

• 3/8 in. drive socket wrench
• 10-mm 6 pt. socket wrench

1.    If the ground cable is connected to the grounding point at the top of the chassis, use the 10-mm wrench to remove the two M6 bolts that attach the ground cable to the grounding point, as shown in the following image.

2.    If the ground cable is connected to the grounding point at the bottom of the chassis, use the 10-mm wrench to remove the two M6 nuts that secure the ground cable to the grounding point.

Step 1	If the ground cable is connected to the grounding point at the top of the chassis, use the 10-mm wrench to remove the two M6 bolts that attach the ground cable to the grounding point, as shown in the following image. Figure 32. NEBS Bonding and Grounding Point—Top of Chassis 1 Two Torx security screws (Do not remove)
Step 2	If the ground cable is connected to the grounding point at the bottom of the chassis, use the 10-mm wrench to remove the two M6 nuts that secure the ground cable to the grounding point. Figure 33. NEBS Bonding and Grounding Point—Bottom of Chassis

Before performing this task, remove all power components, including alarm modules, power modules, DC wiring or AC cables, and both power shelves from the chassis.

You need the following tool to perform this task:

• 6-in. long number 1 Phillips screwdriver
• Power A bus bar shipping bracket

1.    Loosen the Phillips captive screw that secures the Power A bus bar to the chassis. The screw is located on the tab on the left side of the power bus bar.

2.    Loosen the two captive screws on the Power A bus bar handle.

3.    Remove the Power A bus bar from where it is seated.

4.    Carefully secure the Power A bus bar to the chassis frame in a horizontal position by re-installing the shipping bracket. Tighten the six captive screws that attach the shipping bracket to the rear of the chassis.

Step 1	Loosen the Phillips captive screw that secures the Power A bus bar to the chassis. The screw is located on the tab on the left side of the power bus bar. Figure 34. Power A Bus Bar Installed in Chassis 1 Screw securing Power A bus bar to chassis 2 Pivot point 3 Two screws securing handle to Power A bus bar
Step 2	Loosen the two captive screws on the Power A bus bar handle.
Step 3	Remove the Power A bus bar from where it is seated. Note    The Power A bus bar is connected to the chassis with an internal cable. Be careful not to drop the power bus bar.
Step 4	Carefully secure the Power A bus bar to the chassis frame in a horizontal position by re-installing the shipping bracket. Tighten the six captive screws that attach the shipping bracket to the rear of the chassis. Figure 35. Installing the Power A Bus Bar Shipping Bracket 1 Captive screws securing Power A bus bar bracket to chassis rear