Sun Microsystems SunSwift SPARCserver 1000, Manual, Page: 41 / 76

Removing and Replacing System Boards and Assemblies 2-21
2
2.6.2 Replacement
Note – Do not mix 8 Mbyte SIMMs with 32 Mbyte SIMMs (or 1 Mbyte
NVSIMMs) in the same group. (However, SIMMs from different manufacturers
are interchangeable in a single group if the SIMMs all have the same capacity
and speed.)
Caution – If you are adding memory to a system, see Section A.1, “SIMM
Configuration” and Section C.1.4, “SIMMs”. Selecting the wrong location(s)
can impair system performance.
To install or replace SIMMs, proceed as follows:
1. Orient the system board so that the backplane connector faces you.
2. Remove the SIMM (or NVSIMM) from the antistatic package.
3. For NVSIMMs only: if the battery is not already activated, move the
jumper to the ON position. See Figure 2-18. If jumper is already in the ON
position, do not move it.
Caution – Once you turn the battery ON, do not move or remove the jumper.
Any data contained in the NVSIMM memory will be lost.
Note – It is not necessary to move jumpers on NVSIMMs that have been
factory-installed in a new system. The system is delivered with the NVSIMM
batteries activated.
4. Hold the SIMM at the edges, with pin 1 to the left.
The side alignment notch (the left SIMM in Figure 2-13) or the double notch
(the right SIMM in Figure 2-13 or the NVSIMM in Figure 2-14) are at the left
side.
5. Guide the SIMM into the slot at an angle so that the SIMM connector
pads touch the bottom of the socket.
The bottom alignment notch must align with the tab in the center of the
socket. Ensure the locking pins (see Figure 2-16) align with the holes in the
sides of the SIMM.
!
!