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14-10 SPARC Enterprise M4000/M5000 Servers Service Manual • August 2009
4. Remove the power supply units.
See “Removing the Power Supply Unit” on page 7-4.
5. Remove the top cover.
This step includes deploying the rack’s antitilt features (if applicable), sliding the
server out of the equipment rack, and removing the top cover. See “Removing the
Top Cover” on page 5-5.
Caution – The motherboard unit is a heavy assembly that houses the system
motherboard on the underside. Two people are recommended to lift the unit. The
unit has small feet so that it can rest on its bottom without damaging the
motherboard connectors.
6. Remove the motherboard unit.
This step includes removing the CPU modules, possibly removing the memory
boards, removing the CPU module baffles, loosening the eight (8) busbar screws,
loosening the captive screws on the motherboard unit handle and removing the
motherboard. See “Removing the SPARC Enterprise M5000 Motherboard Unit”
on page 13-8.
14.1.6 Removing the SPARC Enterprise M5000
Backplane Unit
1. Unscrew and disconnect the red cable from the backplane unit.
2. Unscrew and disconnect the white cable from the backplane unit.
3. Disconnect the two (2) blue serial cables from the backplane unit.
4. Disconnect the black fan backplane power cable from the backplane unit.
This cable can be removed using one hand on the cable latch and the other
passing through the power supply bays to pull the cable itself.
5. Loosen the six (6) captive screws that hold the backplane unit in position
(
FIGURE 14-4).
The captive screws can be accessed by reaching through the power supply bays.
6. Disconnect the server end of the ground cable.
7. Tip the backplane unit forward and then pull it out of the server and place it
on an ESD mat.