• Supported Platforms
• MX240 Routers

• Related Topics
• MX240 Switch Control Board (SCB) Description
• Removing an MX240 SCB
• Preventing Electrostatic Discharge Damage to an MX240 Router

Installing an MX240 SCB

To install an SCB (see Figure 1):

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 to an MX240 Router.
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 the proper position, horizontally and toward the center of the board.
6. Check the LEDs on the SCB faceplate to verify that it is functioning normally.
   • The green OK/FAIL LED should light steadily a few minutes after the SCB is installed.
   • If the OK/FAIL LED is red, remove and install the SCB again. If the OK/FAIL LED still lights steadily, the SCB is not functioning properly. Contact your customer support representative.
7. Check the status of the SCB using the show chassis environment cb command:
   
   

   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