Removing Components from the MX240 Router Before Installing It With a Lift

To make the router light enough to install, 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 router. The following procedures describe how to remove components from the chassis, first from the rear and then from the front:

1. Removing the Power Supplies Before Installing the MX240 Router With a Lift
2. Removing the Fan Tray Before Installing the MX240 Router With a Lift
3. Removing the SCBs Before Installing the MX240 Router With a Lift
4. Removing the DPCs Before Installing the MX240 Router With a Lift
5. Removing the FPC Before Installing the MX240 Router With a Lift

Removing the Power Supplies Before Installing the MX240 Router With a Lift

Remove the leftmost power supply first and then work your way to the right. To remove the AC or DC power supplies (see Figure 1):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. For an AC-powered router, switch the AC input switch on the power supply to the off (O) position. For a DC-powered router, switch the DC circuit breaker on the power supply to the off (O) 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 1: Removing a Power Supply Before Installing the Router

Removing the Fan Tray Before Installing the MX240 Router With a Lift

To remove the fan tray (see Figure 2 ):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Loosen the captive screws on the fan tray faceplate.
3. Grasp the fan tray handle and pull it out approximately 1 to 3 inches.
4. Press the latch located on the inside of the fan tray to release it from the chassis.
5. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis.

Figure 2: Removing the Fan Tray

Removing the SCBs Before Installing the MX240 Router With a Lift

To remove the SCBs (see Figure 3):

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 an approved site ESD grounding point. See the instructions for your site.
3. Rotate the ejector handles simultaneously counterclockwise to unseat the SCB.
4. Grasp the ejector handles and slide the SCB about halfway out of the chassis.
5. 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.

6. Repeat the procedure for the second SCB.

Figure 3: Removing an SCB

Removing the DPCs Before Installing the MX240 Router With a Lift

To remove a DPC (see Figure 4):

1. Have ready an antistatic mat for the DPC. Also have ready rubber safety caps for each DPC using an optical interface on the DPC that you are removing.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to an approved site ESD grounding point. See the instructions for your site.
3. Simultaneously turn both the ejector handles counterclockwise to unseat the DPC.
4. Grasp the handles and slide the DPC straight out of the card cage halfway.
5. Place one hand around the front of the DPC and the other hand under it to support it. Slide the DPC completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.

   Caution: The weight of the DPC 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 DPC out of the chassis. When the DPC 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 DPC 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 4: Removing a DPC

Removing the FPC Before Installing the MX240 Router With a Lift

To remove an FPC (see Figure 5):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Simultaneously turn both the ejector handles counterclockwise to unseat the FPC.
3. Grasp the handles and slide the FPC straight out of the card cage halfway.
4. Place one hand around the front of the FPC and the other hand under it to support it. Slide the FPC completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.

   Caution: The weight of the FPC is concentrated in the back end. Be prepared to accept the full weight—up to 18 lb (8.2 kg)—as you slide the FPC out of the chassis. When the FPC is out of the chassis, do not hold it by the ejector handles, bus bars, or edge connectors. They cannot support its weight.

Figure 5: Removing an FPC