Memory DIMM

Use this procedure to service a memory DIMM.

1. Power off the unit

   Power should be removed from the unit containing the memory DIMM. If this unit is powered on, power it off now.

2. Disconnect the power cords

   Disconnect all power cords from the unit you are servicing.

3. Place into service position

   Note to expansion unit users: The instructions in this procedure are written based on the rack model. Expansion unit users can still use this procedure; however, expansion unit users should ignore specific references to rack-only features such as rack doors, rack thumbscrews, and rack-specific FRU orientation. Attention: When placing the model rack into the service position, it is essential that all stability plates are firmly in position to prevent the rack from toppling. Ensure that only one system unit is in the service position at a time. Remove two screws (A) securing the system unit (B) to the rack.

4. Place into service position (continued)

   While holding the system unit release latches (A) down on both the left and right sides, pull the system unit (B) out from the rack until the rails are fully extended and locked. Notes: Ensure that the cables at the back of the system unit do not catch or bind as you pull the unit forward in the rack. When the system unit rails are fully extended, the rail safety latches lock into place. This action prevents the system from being pulled out too far.

5. Remove the service access cover

   Loosen the two thumbscrews (A) located at the back of the cover. Slide the cover (B) toward the back of the system unit. When the front of the service access cover has cleared the upper frame ledge, lift the cover up and off the system unit. Attention: For proper cooling and airflow, replace the cover before turning on the system. Operating the system without the cover for more than 30 minutes could damage the system components.

6. Remove the system processor assembly

   Move the top of the system processor assembly handles (A) in the direction shown to release the handles. Rotate the system processor assembly handles to the open position (B). Pull the system processor assembly (C) out by the handles. Place the system processor assembly on an electrostatic discharge (ESD) surface.

7. Remove the memory DIMM

   Remove the memory DIMM by pushing the tabs (A) out and then down. The tabs' lever action forces the memory DIMM out of the connector. Pull the memory DIMM (B) out of the connector.

8. Install the memory DIMM

   Ensure that the connector locking tabs (A) are pushed out in the unlocked position before installing a new memory DIMM. Attention: Memory DIMMs are keyed to prevent a DIMM from being installed improperly. Note the locations of the key tabs within the DIMM connector before attempting to install the DIMM. Carefully grasp the memory DIMM (B) along two edges and align the connector. Insert the memory DIMM firmly into the connector. Secure the memory DIMM by pushing in the locking tabs (A).

9. Install the system processor assembly

   Rotate the system processor assembly handles (A) to the open position. Align the system processor assembly (B) with the slot in the system frame. Carefully push on the system processor assembly until you feel it lock into place. Rotate the handles to the locked position (C).

10. Install the service access cover

    Place the service access cover (A) on the top of the system, about 25 mm (1 in.) from the front of the system. Hold the service access cover against the system unit and slide it toward the front of the system. The tabs of the service access cover slide beneath the upper chassis ledge. Align the two thumbscrews (B) located on the back of the service access cover with the two holes on the back of the system chassis. Tighten the thumbscrews to secure the service access cover.

11. Place into operating position

    To unlock the rail safety latches (B), slide the latches towards the front of the system. Push the system unit (A) back into the rack until both system-unit release latches have locked into position. Note: Ensure that the cables at the back of the system do not catch or bind as you push the system unit back into the rack.

12. Place into operating position (continued)

    Replace and tighten the two screws (B) that secure the system unit (A) to the rack.

13. Connect the power cords

    If you removed the power cords, connect all power cords to the unit you are servicing.

14. Go to Verifying a repair .