Technical Documentation
Replacing a T640 Craft Interface
The craft interface is hot-insertable and hot-removable. When you install the craft interface, allow several minutes for the display to reflect the current state of the router. Before you remove the craft interface, remove the front upper fan tray. For instructions on removing a front fan tray, see Removing a T640 Front Fan Tray.
Removing a T640 Craft Interface
The craft interface is located on the front of the chassis above the FPC card cage and weighs approximately 2 lb (0.9 kg). To remove the craft interface (see Figure 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.
- Completely loosen the screws at the four corners of the craft interface.
- Insert the blade of a flat-blade screwdriver into the slot on one side of the craft interface, and then gently pry that side out from the chassis.
- Insert the blade of a flat-blade screwdriver into the slot on the other side of the craft interface, and then gently pry that side out from the chassis.
- Grasp the craft interface by the top and bottom edges, and carefully pull it straight out of the chassis.
Figure 1: Removing a Craft Interface
Installing a T640 Craft Interface
To install the craft interface (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.
- Grasping the craft interface by the top and bottom edges, press it into place.
- Tighten the screws at the corners of the craft interface.
Note: When you install the craft interface in an operating router, allow several minutes for the LEDs on the craft interface to reflect the current state of the router.
After you install the replacement craft interface, immediately reinstall the upper front fan tray.
Figure 2: Installing a Replacement Craft Interface
