NEC EXPRESS5800/140He, Service Manual

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4.10.9 Replacement of Main Board or Connect Board on
140Rd-4 Chassis
1. Make sure that the power of the Server is off, and disconnect the AC cables from all the
power units.
2. Remove the Processor and Memory Boards from the Server.
3. Remove the rear access cover, front access cover, PCI access cover, fans, fan cage, and
power cage.
4. Do steps 4 and 5 in Subsection 4.10.5 to separate the I/O Board from the Main Board.
To replace the Main or Connect Board, the electronics bay does not need to be removed
from the Server but the I/O Board must be separated from the Main Board with the
ejectors.
5. For the Server of the 3.5-inch device model (3HDD model), pull out the SCSI cables for
3.5-inch devices from the HDD cage.
To replace the Main or Connect Board, the power cables for 3.5-inch devices does not
need to be pulled out from the HDD cage but the SCSI cables must be pulled out.
6. Do step 5 in Subsection 4.10.7 to separate the SCSI-BP from the Connect Board.
To replace the Main or Connect Board, the HDD cage does not need to be removed from
the Server but the SCSI-BP must be separated from the Connect Board with the ejectors.
7.
Remove the screws (2) fixing the Main Board to the Server. Then pull out the Main Board,
Connect Board, and brackets upward to remove them from the Server.
Remove the two screws, and then lift the
board to remove it from the chassis.
Fixing screw (×2)