Sun Microsystems Ultra 5, Service Manual

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8-8 Sun Ultra 5 Service Manual • February 2000
8.3.2 Replacing a DIMM
Caution –
Do not remove any DIMM from the antistatic container until you are
ready to install it on the motherboard. Handle DIMMs only by their edges. Do not
touch DIMM components or metal parts. Always wear a grounding strap when
handling DIMMs.
1. Remove the DIMM from the antistatic container.
2. Install the DIMM as follows: (
FIGURE 8-3
)
Caution – The system must have two identical DIMMs installed in a bank. For best
system performance, install four identical DIMMs in the two banks.
TABLE 8-1
identifies DIMM banks and slot pairs.
a. Position the DIMM in the connector, ensuring that the notches on the bottom
of the DIMM are aligned with the connector alignment bumps.
Note –
Bottom DIMM notches and connector alignment bumps are keyed to ensure
proper DIMM orientation.
Caution –
If the DIMM is not seated into its slot evenly, it can cause shorts that will
damage the system. Ensure that all contacts engage at the same time by pressing
evenly on the top corners of the DIMM—do not rock the DIMM into place.
A clicking sound is heard when the DIMM is properly seated.
b. Press firmly on the DIMM top until the DIMM is properly seated.
3. Verify the ejection levers are closed toward the DIMM.
4. Detach the wrist strap, replace the system cover, and power on the system as
decribed in Chapter 10.