• Supported Platforms
• TX Matrix Routers

• Related Topics
• TX Matrix Control Board (TX-CB) Description
• TX Matrix Control Board (TX-CB) LEDs
• TX Matrix Preventing Electrostatic Discharge Damage

Replacing a TX Matrix TX-CB

1. Removing a TX Matrix TX-CB
2. Installing a TX Matrix TX-CB

Removing a TX Matrix TX-CB

To remove a TX-CB (see Figure 1):

1. Take the host subsystem offline. See Taking a TX Matrix Host Subsystem Offline.

   Caution: Before you replace a TX-CB, you must take the host subsystem offline. If there is only one host subsystem, taking the host subsystem offline shuts down the TX Matrix router.

   Caution: If the TX-CB to be replaced is associated with the Routing Engine currently functioning as the master Routing engine, switch it to the backup before removing the TX-CB.

2. Place an electrostatic bag or antistatic mat on a flat, stable surface.
3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
4. Loosen the captive screws (using a Phillips (+) screwdriver, number 2) on the ejector handles on both sides of the TX-CB faceplate.
5. Flip the ejector handles outward to unseat the TX-CB.
6. Grasp the ejector handles and slide the TX-CB about halfway out of the chassis.
7. Place one hand underneath the TX-CB to support it, and slide it completely out of the chassis.
8. Place the TX-CB on the antistatic mat.
9. If you are not replacing the TX-CB now, install a blank panel over the empty slot.

Installing a TX Matrix TX-CB

To install a TX-CB (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.
2. Carefully align the sides of the TX-CB with the guides inside the chassis.
3. Slide the TX-CB into the chassis, carefully ensuring that it is correctly aligned.
4. Grasp both ejector handles and press them inward to seat the TX-CB.
5. Tighten the captive screws on the ejector handles, using a Phillips (+) screwdriver, number 2.
6. If power is applied to the Routing Engine and its corresponding TX-CB is functioning normally, the TX-CB comes online automatically. To verify that the TX-CB is functioning normally, check the LEDs on its faceplate. The green OK LED should light steadily a few minutes after the TX-CB is installed. If the FAIL LED is lit steadily, remove (seeRemoving a TX Matrix TX-CB ) and install the TX-CB again . If the FAIL LED still lights steadily, the TX-CB is not functioning properly. Contact your customer support representative.

   To check the status of the TX-CB, use the CLI command:

   
   

   user@host> show chassis environment cb scc