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Removing Components from the Chassis

To make the services gateway light enough to install manually, you first remove most components from the chassis. The procedures in this section for removing components from the chassis are for initial installation only, and assume that you have not connected power cables to the services gateway. The following procedures describe how to remove components from the chassis, first from the rear and then from the front:

Removing the Power Supplies

The power supplies are located at the rear of the chassis. Each AC power supply weighs approximately 5.0 lb (2.3 kg) and each DC power supply weighs approximately 3.8 lb (1.7 kg).

Remove the leftmost power supply first and then work your way to the right. To remove the AC or DC power supplies, follow this procedure for each power supply (see Figure 77):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
  2. For an AC-powered services gateway, switch the AC switch on the power supply slot to the off position (O). For a DC-powered services gateway, switch the circuit breaker on the power supply to the OFF position.

    We recommend this even though the power supplies are not connected to power sources.

  3. Pull the power supply straight out of the chassis.

Figure 77: Removing a Power Supply Before Installing the Services Gateway

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Removing the Fan Tray

In the rear of the chassis, the fan tray is located on the right of the chassis. The fan tray weighs about 6.8 lb (3.08 kg).

To remove the fan tray (see Figure 78 ):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
  2. Loosen the captive screw on each side of the fan tray faceplate.
  3. Grasp both sides of the fan tray and pull it out approximately 1 to 3 inches.
  4. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis.

Figure 78: Removing the Fan Tray

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Removing SCBs

The device can have two SCBs. They are located horizontally on the bottom front of the chassis in the slots marked 0 and 1. Each SCB weighs approximately 9.6 lb (4.4 kg).

Caution: Before removing or replacing any component, ensure you are operating the ejector handles properly and they are stored correctly on all components.

To remove the SCBs, follow this procedure for each SCB (see Figure 79):

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
  2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
  3. Loosen the captive screws on the ejector handles on both sides of the SCB faceplate.
  4. Simultaneously rotate the ejector handles counterclockwise to unseat the SCB.
  5. Grasp the ejector handles and slide the SCB about halfway out of the chassis.
  6. Place one hand underneath the SCB to support it and slide it completely out of the chassis. Place it on the antistatic mat.

    Caution: Do not stack hardware components on one another after you remove them. Place each component on an antistatic mat resting on a stable, flat surface.

  7. Repeat the procedure for the second SCB.

Figure 79: Removing an SCB

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Removing IOCs and SPCs

The services gateway holds up to six IOCs and SPCs, which are installed horizontally in the front of the device. Each IOCs or SPC weighs up to 13.1 lb (5.9 kg), be prepared to accept its full weight.

To remove an IOC or SPC (see Figure 80):

  1. Have ready an antistatic mat for the card. Also have ready rubber safety caps for each port using an optical interface on the card that you are removing.
  2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
  3. Label the cables connected to each port on the IOC so that you can later reconnect the cables to the correct ports.
  4. If a card uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap. Arrange the disconnected cables in the cable management system, to prevent the cables from developing stress points.

    Warning: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

    Caution: Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

    Caution: Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

  5. Simultaneously turn both the ejector handles counterclockwise to unseat the IOC.
  6. Grasp the handles and slide the card straight out of the card cage halfway.
  7. Place one hand around the front of the card and the other hand under it to support it. Slide the IOC completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.

    Caution: The weight of the card is concentrated in the back end. Be prepared to accept the full weight—up to 13.1 lb (5.9 kg)—as you slide the card out of the chassis.

    When the card is out of the chassis, do not hold it by the ejector handles, bus bars, or edge connectors. They cannot support its weight.

    Do not stack cards on top of one another after removal. Place each one individually in an electrostatic bag or on its own antistatic mat on a flat, stable surface.

Figure 80: Removing an IOC or SPC

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