Reinstalling Components in the MX240 Router After Installing it With a Lift

After the router is installed in the rack, you reinstall the removed components before booting and configuring the router. The following procedures describe how to reinstall components in the chassis, first in the rear and then in the front:

1. Reinstalling the Power Supplies After Installing the MX240 Router With a Lift
2. Reinstalling the Fan Tray After Installing the MX240 Router With a Lift
3. Reinstalling the SCBs After Installing the MX240 Router With a Lift
4. Reinstalling the DPCs After Installing the MX240 Router With a Lift
5. Reinstalling the FPCs After Installing the MX240 Router With a Lift

Reinstalling the Power Supplies After Installing the MX240 Router With a Lift

Reinstall the rightmost power supply first and then work your way to the left. To reinstall the AC or DC power supplies (see Figure 1, which shows the installation of the DC power supplies):

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.
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 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. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the chassis slot. The power supply faceplate should be flush with any adjacent power supply faceplate or blank installed in the power supply slot.
4. Tighten the captive screws.

Figure 1: Reinstalling a Power Supply

Reinstalling the Fan Tray After Installing the MX240 Router With a Lift

To reinstall the fan tray (see Figure 2):

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.
2. Grasp the fan tray on each side and insert it straight into the chassis. Note the correct orientation by the "this side up" label on the top surface of the fan tray.
3. Tighten the captive screws on the fan tray faceplate to secure it in the chassis.

Figure 2: Reinstalling a Fan Tray

Reinstalling the SCBs After Installing the MX240 Router With a Lift

To reinstall an SCB (see Figure 3):

Caution: Before removing or replacing an SCB, ensure that the ejector handles are stored vertically and pressed toward the center of the SCB.

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.
2. Carefully align the sides of the SCB with the guides inside the chassis.
3. Slide the SCB into the chassis until you feel resistance, carefully ensuring that it is correctly aligned.
4. Grasp both ejector handles and rotate them simultaneously clockwise until the SCB is fully seated.
5. Place the ejector handles in their proper position, horizontally and toward the center of the board. To avoid blocking the visibility of the LEDs position the ejectors over the PARK icon.

Figure 3: Reinstalling an SCB

Reinstalling the DPCs After Installing the MX240 Router With a Lift

To reinstall a DPC (see Figure 4):

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.
2. Place the DPC on an antistatic mat or remove it from its electrostatic bag.
3. Identify the slot on the router where it will be installed.
4. Verify that each fiber-optic transceiver is covered by a rubber safety cap. If it does not, cover the transceiver with a safety cap.
5. Orient the DPC so that the faceplate faces you.
6. Lift the DPC into place and carefully align the sides of the DPC with the guides inside the card cage.
7. Slide the DPC all the way into the card cage until you feel resistance.
8. Grasp both ejector handles and rotate them clockwise simultaneously until the DPC is fully seated.

Figure 4: Reinstalling a DPC

Reinstalling the FPCs After Installing the MX240 Router With a Lift

To reinstall a DPC (see Figure 5):

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.
2. Place the FPC on an antistatic mat or remove it from its electrostatic bag.
3. Identify the two DPC slots on the router where the FPC will be installed.
4. Verify that each fiber-optic transceiver on the PIC is covered by a rubber safety cap. If it does not, cover the transceiver with a safety cap.
5. Orient the FPC so that the faceplate faces you.
6. Lift the FPC into place and carefully align the sides of the FPC with the guides inside the card cage.
7. Slide the FPC all the way into the card cage until you feel resistance.
8. Grasp both ejector handles and rotate them clockwise simultaneously until the FPC is fully seated.

Figure 5: Reinstalling an FPC