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Memory DIMMs
The following procedures describe the removal, replacement, and installation of memory DIMMs. Before
performing the following procedures, read the "Safety Notices" on page ix.
Removing Memory DIMMs
To remove the memory DIMMs, do the following:
1. Using the procedures in Chapter 11, "Component and Attention LEDs," on page 309, locate the
memory DIMMs, and determine which DIMM you want to remove.
Attention:
To prevent damage to the memory DIMM and the memory DIMM connectors, open or
close the retention latches at the same time.
2. Stop the system as described in "Stopping the System" on page 246.
3. Disconnect the power source from the system.
Note: This system may be equipped with a second power supply. Before continuing with this
procedure, ensure that the power source to the system has been completely disconnected.
4. If necessary to access DIMM positions on the system backplane, disconnect the cables from the
power supplies or service processor assembly at the rear of the system.
5. Place the system into the service position as described in "Placing the Model 275 into the Service
and Operating Position" on page 248.
6. Remove the service access cover as described in "Removing the Service Access Cover" on page
249..
7. Remove the fan tray assembly as described in "Removing the Fan Tray Assembly" on page 268.
8. If necessary to access DIMM positions on the system backplane, remove the power supply filler and
the power supply (or both power supplies if a secondary supply is installed), as described in
"Removing a Power Supply with the System Power Off" on page 288.
9. If necessary to access DIMMs on the system backplane, remove the service processor assembly as
described in "Service Processor Assembly" on page 260.
10. Before handling any card, board, or memory DIMM, touch any metal surface of the chassis with one
hand to minimize static electricity discharge. Refer to "Handling Static-Sensitive Devices" on page
244..
11. Remove the memory DIMM by pushing the tabs out and then down. The tabs' lever action forces the
memory DIMM out of the connector.
12. Pull the memory DIMM out of the connector as shown in the following illustration.
2
1
1 Connector Tabs (unlocked position)
2 Memory DIMM
1
Chapter 9. Removal and Replacement Procedures
293
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