Dell PowerEdge 4100 Service Manual - Page 53

SCSI Backplane Board

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SCSI Backplane Board hard-disk drive carrier thumb screw hook (10) SCSI backplane board Figure 4-10. SCSI Backplane Board Removal To remove the SCSI backplane board, follow these steps: 1. Disconnect the hard-disk drive carrier connectors from the SCSI back- plane board by sliding each carrier toward the front of the computer approximately 1 inch. 2. Disconnect all cables from the SCSI backplane board. 3. Unscrew the thumb screw. 4. Disengage the board from the ten hooks holding the board to the computer chassis, and lift the board away from the computer. An insulator (similar to the one for the power-supply paralleling board in Figure 4-12) is attached to the back of the SCSI backplane board with two adhesive strips. Removing and Replacing Parts 4-11

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Removing and Replacing Parts
4-11
S
CSI Backplane Board
Figure 4-10.
SCSI Backplane Board Removal
To remove the SCSI backplane board, follow these steps:
1.
Disconnect the hard-disk drive carrier connectors from the SCSI back-
plane board by sliding each carrier toward the front of the computer
approximately 1 inch.
2.
Disconnect all cables from the SCSI backplane board.
3.
Unscrew the thumb screw.
4.
Disengage the board from the ten hooks holding the board to the com-
puter chassis, and lift the board away from the computer.
An insulator (similar to the one for the power-supply paralleling board in
Figure 4-12) is attached to the back of the SCSI backplane board with two
adhesive strips.
SCSI backplane board
hard-disk drive
carrier
thumb screw
hook (10)