Simm And Nvsimm - Sun Microsystems SPARCcenter 2000 Service Manual

10.5 SIMM and NVSIMM

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10.5.1 Removal
All SIMMs and NVSIMMs are removed and installed in the same manner.
If you are adding SIMMs or NVSIMMs to the system, always add these devices
in multiples of eight. Also, be aware that your choice of location can affect the
efficient operation of these devices. For rules for selecting a location and for
optimizing memory use, see Section E.3.3, "SIMMs," on page 7.
Caution – Do not mix SIMMs of different capacities. A replacement SIMM may
or may not resemble the original SIMM. When replacing a SIMM or NVSIMM,
verify that the memory capacity and the part number are the same as for the
original. Do not rely on the physical appearance. See Section E.3.3, "SIMMs"
for drawings and device markings.
If a SIMM or NVSIMM fails, the power-on selftests (POST) will identify the
location number (also known as the U-number or J-number) of the failing
device. The socket number (J-number) is printed on the back of the board.
1. Locate the faulty SIMM by matching the location number displayed by
POST with the U-number shown in Figure 10-10.
2. Orient the system board so that the XDBus connectors face you.
3. To unlock a SIMM, press the locking tabs toward the sides of the socket
and tilt the SIMM forward.
See Figure 10-11.
4. Unlock two more SIMMs to make space for the faulty SIMM to tilt
forward far enough to be free of the locking pins.
See Figure 10-12.
5. Remove the SIMM from the socket.
System Boards and Component Replacement
10
10-11