Replacing an MX960 SCB
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. |
| Caution: Before you replace an SCB, you must take the host subsystem offline. If there is only one host subsystem, taking the host subsystem offline shuts down the router. |
- Take the host subsystem offline.
- Place an electrostatic bag or antistatic mat on a flat, stable surface.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- 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 an SCB
Installing an MX960 SCB
To install an SCB (see Figure 2):
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Carefully align the sides of the SCB with the guides inside the chassis.
- Slide the SCB 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 SCB is fully seated.
- Place the ejector handles in the proper position, vertically and toward the center of the board.
- 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.
- Check the status of
the SCB using the show chassis environment cb command:
user@host> show chassis environment cbCB 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
Figure 2: Installing an SCB
