13-8 SPARC Enterprise M4000/M5000 Servers Service Manual • December 2010
Note – If the motherboard unit is only being removed to provide access to the
busbar, and the weight of the motherboard is not a problem, Step 4 can be skipped.
4. Remove all of the memory boards.
See Section 11.1.2, “Removing the Memory Board” on page 11-5.
13.1.6 Removing the M5000 Server Motherboard Unit
Caution – Use proper ESD grounding techniques when handling components. See
Section 1.1, “Safety Precautions” on page 1-1.
1. Release the latch and pull the two (2) CPU module baffles out of the server
(
FIGURE 13-4).
2. Remove the eight (8) bus bar screws at the front of the server using a magnetic
screwdriver.
3. Loosen the two (2) captive screws in the center of the motherboard unit to
release the motherboard unit handles.
4. Pull the motherboard unit handles until they are vertical.
This unseats the motherboard unit from the backplane.
Caution – The motherboard is heavy. Two people are recommended to lift the unit.
If the unit is too heavy the memory boards can be removed prior to lifting the unit.
5. Lift the unit out of the server.
The unit has small feet so that it can rest on its bottom without damaging the
motherboard connectors.
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