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Table of Contents Expand all

play_arrow Fast Track: Initial Installation
- Fast Track to Rack Installation and Power
- Onboard, Configure, and Monitor MX960
play_arrow Overview
- play_arrow System Overview
  - MX960 Router Overview
- play_arrow Chassis Components and Descriptions
- play_arrow Cooling System Components and Descriptions
  - MX960 Cooling System Description
  - MX960 Fan LED
- play_arrow Host Subsystem Components and Descriptions
- play_arrow Interface Modules—DPCs
- play_arrow Interface Modules—FPCs and PICs
- play_arrow Interface Modules—MPCs and MICs
- play_arrow Services Processing Card—MX-SPC3
  - Services Processing Card—MX-SPC3 Services Card
- play_arrow Power System Components and Descriptions
- play_arrow Switch Control Board Components and Descriptions
play_arrow Site Planning, Preparation, and Specifications
- play_arrow Preparation Overview
- play_arrow Transceiver and Cable Specifications
- play_arrow Pinout Specifications
- play_arrow AC Power Requirements, Specifications, and Guidelines
- play_arrow DC Power Requirements, Specifications, and Guidelines
- play_arrow High-Voltage Second-Generation Universal (HVAC or HVDC) Power Requirements, Specifications, and Guidelines
play_arrow Initial Installation and Configuration
play_arrow Installing and Replacing Components
- play_arrow Overview of Installing and Replacing Components
  - MX960 Field-Replaceable Units
  - Tools and Parts Required for MX960 Router Connections
- play_arrow Installing Components
- play_arrow Replacing Chassis Components
- play_arrow Replacing Cooling System Component
  - Replacing the MX960 Air Filter
  - Replacing an MX960 Fan Tray
- play_arrow Replacing Host Subsystem Components
- play_arrow Replacing Line Card Components
- play_arrow Replacing Power System Components
- play_arrow Replacing and Upgrading Switch Control Boards
play_arrow Maintaining the Chassis and Components
- play_arrow Routine Maintenance Procedures
  - Routine Maintenance Procedures for the MX960 Router
- play_arrow Maintaining Components
- play_arrow Converting to a Different Type of Power Supply
  - Converting from AC to DC Power Supplies on an MX960 Router
  - Converting from DC to AC Power Supplies on an MX960 Router
play_arrow Troubleshooting Hardware
- play_arrow Knowledge Base
  - https://kb.juniper.net/
- play_arrow Troubleshooting Components
play_arrow Contacting Customer Support and Returning the Chassis or Components
- play_arrow Contacting Customer Support
  - Contact Customer Support
- play_arrow Locating Component Serial Numbers
- play_arrow Packing and Returning Components
play_arrow Safety and Compliance Information
- play_arrow General Safety Guidelines and Warnings
- play_arrow Installation and Maintenance Safety Guidelines and Warnings
- play_arrow Radiation and Laser Warnings
  - Laser and LED Safety Guidelines and Warnings
  - Radiation from Open Port Apertures Warning
- play_arrow Maintenance and Operational Safety Guidelines and Warnings
  - Maintenance and Operational Safety Guidelines and Warnings
- play_arrow Electrical Safety Guidelines and Warnings
- play_arrow Agency Approvals and Compliance Statements

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English

Replacing an MX960 SCB

date_range 09-Mar-21

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Before replacing an SCB, read the guidelines in Operating and Positioning the MX960 SCB Ejectors.

Removing an MX960 SCB

To remove an SCB (see Figure 1):

Note:

You can remove the SCB and Routing Engine as a unit, or remove the Routing Engine separately.

CAUTION:

Before removing an SCB, ensure that you know how to operate the ejector handles properly to avoid damage to the equipment.

Note:

You do not need to offline the host subsystem if you are replacing an SCB where no Routing Engine is installed.

Take the host subsystem offline.

Note:
If there is only one host subsystem, taking the host subsystem offline shuts down the router and you are not required to offline the SCB.
1. Determine whether the host subsystem is the primary or backup using the show chassis routing-engine CLI command. The output of this command will show whether the host subsystem is functioning as the primary or backup.
2. If the host subsystem is functioning as the primary, switch it to backup using the request chassis routing-engine master switch command.
3. On the console or other management device connected to the backup Routing Engine, enter CLI operational mode and run one of the following commands to take the backup host subsystem offline:
  - request vmhost halt command if the Routing Engine supports VMHost.
  - request system halt command if the Routing Engine does not support VMHost.
  Wait until a message appears on the console confirming that the operating system has halted.
Take the SCB offline by issuing the following CLI command:
```
user@host>request chassis cb slot slot-number offline
```
Place an electrostatic bag or antistatic mat on a flat, stable surface.
Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
Rotate the ejector handles simultaneously counterclockwise to unseat the SCB.
Grasp the ejector handles, and slide the SCB about halfway out of the chassis.
Place one hand underneath the SCB to support it, and slide it completely out of the chassis.
Place the SCB on the antistatic mat.
If you are not replacing the SCB now, install a blank panel over the empty slot.

Figure 1: Removing a MX960 SCB

Installing an MX960 Switch Control Board

Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
Carefully align the sides of the Switch Control Board with the guides inside the chassis.
Slide the Switch Control Board into the chassis until you feel resistance, carefully ensuring that it is correctly aligned.
Grasp both ejector handles, and rotate them simultaneously clockwise until the Switch Control Board is fully seated.
Place the ejector handles in the proper position, horizontally and toward the center of the board.

Figure 2: Installing a Switch Control Board in the MX960 Router
Check the LEDs on the Switch Control Board faceplate to verify that it is functioning normally.
- The green OK/FAIL LED should light steadily a few minutes after the Switch Control Board is installed.
- If the OK/FAIL LED is red, remove and install the Switch Control Board again. If the OK/FAIL LED still lights steadily, the Switch Control Board is not functioning properly. Contact your customer support representative.

Check the status of the Switch Control Board using the show chassis environment cb command:

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user@host> show chassis environment cb
CB 0 status:
  State                      Online Master
  Temperature                25 degrees C / 77 degrees F
  Power 1
    1.2 V                     1198 mV
    1.5 V                     1508 mV
    1.8 V                     1830 mV
    2.5 V                     5059 mV
    3.3 V                     6593 mV
    5.0 V                     5111 mV
    12.0 V                   12181 mV
    1.25 V                    1250 mV
    3.3 V SM3                 6587 mV
    5 V RE                    5078 mV
    12 V RE                  12026 mV
  Power 2
    11.3 V bias PEM          11253 mV
    4.6 V bias MidPlane       4827 mV
    11.3 V bias FPD          11408 mV
    11.3 V bias POE 0        11446 mV
    11.3 V bias POE 1        11408 mV
  Bus Revision               6
  FPGA Revision              0
CB 1 status:
  State                      Online Standby
  Temperature                26 degrees C / 78 degrees F
  Power 1
    1.2 V                     1211 mV
    1.5 V                     1517 mV
    1.8 V                     1817 mV
    2.5 V                     2507 mV
    3.3 V                     3312 mV
    5.0 V                     5136 mV
    12.0 V                   12142 mV
    1.25 V                    1260 mV
    3.3 V SM3                 3306 mV
    5 V RE                    5085 mV
    12 V RE                  11968 mV
  Power 2
    11.3 V bias PEM          11369 mV
    4.6 V bias MidPlane       4814 mV
    11.3 V bias FPD          11427 mV
    11.3 V bias POE 0        11350 mV
    11.3 V bias POE 1        11330 mV
  Bus Revision               39
  FPGA Revision              1

arrow_backward PREVIOUS Replacing an MX960 DC Power Supply Cable

NEXT arrow_forward Upgrading an MX960 to Use the SCBE-MX

MX960 Universal Routing Platform Hardware Guide

ON THIS PAGE

Replacing an MX960 SCB

Removing an MX960 SCB

Installing an MX960 Switch Control Board

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MX960 Universal Routing Platform Hardware Guide

ON THIS PAGE

Replacing an MX960 SCB

Removing an MX960 SCB

See Also

Installing an MX960 Switch Control Board

See Also

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