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• T640 RE-C1800 Description on page 42

• T640 RE-C1800 LEDs on page 43

• T640 Preventing Electrostatic Discharge Damage on page 506

Replacing a DIMM Module in a T640 Routing Engine

Removing a T640 DIMM Module on page 324

Installing a T640 DIMM Module on page 324

Removing a T640 DIMM Module

The DIMM modules are located on the top of the Routing Engine. To remove a DIMM

module:

1. Place an electrostatic bag or antistatic mat on a flat, stable surface.

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.

3. Remove the Routing Engine.

4. Depending on which Routing Engine you are using, there are two different procedures

for ejecting the DIMMs:

•

For Routing Engines with an ejector on one side of the DIMM, press the plastic ejector

of the DIMM module. The edge of the module raises upward.

•

For Routing Engines with ejectors on each side of the DIMM, press the plastic ejectors

on both sides of the DIMM module.

5. Grasp the DIMM module, being careful not to touch any electrical components on the

module, and firmly pull it out of the slot on the Routing Engine.

6. Place the DIMM module on the antistatic mat or in the electrostatic bag.

7. Push the plastic ejectors to close the empty DIMM module slot.

Installing a T640 DIMM Module

To insert a DIMM module into the Routing Engine:

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.

2. Remove the DIMM module from its electrostatic bag.

3. To open the empty DIMM slot, press the plastic ejectors open.

4. Grasp the DIMM module by the edges, being careful not to touch any electrical

components.

5. Pressing firmly on both ends, push the module into the slot until the ejectors return

completely to the closed position.

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