Juniper MX240 User manual

Removing Components from the MX240 Chassis Before Installing It Without a Lift
To make the router 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 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 Without a
Lift on page 1
2. Removing the Fan Tray Before Installing the MX240 Router Without a
Lift on page 2
3. Removing the SCBs Before Installing the MX240 Router Without a Lift on page 2
4. Removing the DPCs Before Installing the MX240 Router Without a Lift on page 3
5. Removing the FPC Before Installing the MX240 Router Without a Lift on page 4
Removing the Power Supplies Before Installing the MX240 Router Without 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 Components from the MX240 Chassis Before Installing It Without a Lift ■1

Removing the Fan Tray Before Installing the MX240 Router Without 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 Without 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.
2■Removing the Fan Tray Before Installing the MX240 Router Without a Lift

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 Without 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.
Removing the DPCs Before Installing the MX240 Router Without a Lift ■3

Figure 4: Removing a DPC
Removing the FPC Before Installing the MX240 Router Without 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.
4■Removing the FPC Before Installing the MX240 Router Without a Lift

Figure 5: Removing an FPC
Related Topics ■Tools and Parts Required to Remove Components from an M Series, MX Series,
or T Series Router
■Installing the MX240 Chassis in the Rack Manually
■Reinstalling Components in the MX240 Router After Installing It Without a Lift
■Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series
Routing Platform
Published: 2010-01-22
Removing the FPC Before Installing the MX240 Router Without a Lift ■5