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Chapter 14 Backplane Unit Replacement 14-5
5. Remove the motherboard unit.
This step includes removing the CPU modules, possibly the memory boards,
disconnecting the cable management arm, and removing the motherboard. See
“Removing the SPARC Enterprise M4000 Motherboard Unit” on page 13-5.
6. Remove the power supply units.
See “Removing the Power Supply Unit” on page 7-4.
7. Remove the fan cover.
a. Remove the 60-mm fan units and place them on an ESD mat.
See “Removing the 60-mm Fan Module” on page 10-5.
b. Loosen the captive screw on the fan cover.
c. Lift the rear edge of the fan cover and remove it.
Note – Support the bottom of the power supply with one hand to avoid the rear of
the unit swinging and hitting the system as it is removed.
8. Remove the CD-RW/DVD-RW Drive Backplane.
This step includes removing the CD-RW/DVD-RW Drive Unit and the CD-
RW/DVD-RW Drive Backplane. See “Removing the CD-RW/DVD-RW Drive
Backplane of the SPARC Enterprise M4000 Server” on page 6-17.
9. Remove the 60-mm fan backplane.
This step includes removing the cable connectors, loosening the captive screws
and removing the 60-mm fan backplane. See “Removing the 60-mm Fan
Backplane” on page 10-11.
14.1.2 Removing the SPARC Enterprise M4000
Backplane Unit
1. Disconnect the backplane unit cables.
The backplane unit ships with the cables so the old cables should be removed.
a. Disconnect the flat red cable from the bottom left of the backplane unit.
b. Disconnect the blue serial cables from the storage device backplanes.
c. Disconnect the power cables from the storage device backplanes.
d. Remove the cables from the plastic cable router.