Installing A New Scsi Backplane; Replacing Fans - Silicon Graphics Origin200 Owner's Manual

Chapter 10: Removing and Replacing Internal Components
202

Installing a New SCSI Backplane

Follow these steps to install a new SCSI backplane:
1. Hang the new SCSI backplane over the guide pins on the sheet metal wall (the one
towards the front of the chassis).
2. As you lower the board in place, gently press in at the bottom of the board.
3. Push the top of the SCSI backplane towards the sheet metal wall, being careful not
to damage the LEDs as you guide them through their respective holes.
4. Reattach the cables.
5. Snap the six spring clips back up into place.

Replacing Fans

If you have not done so already, follow the procedures in "Preparing the Origin200 for
Servicing" to make sure the system is opened up and ready to work on. Once you have
opened the Origin200 chassis, follow these steps to remove a fan:
1. Unplug the power connector from the fan to the power supply, as shown in
Figure 10-3.
2. Remove the two plastic rivets that hold the fan to the sheet metal, as shown in
Figure 10-3. Push them out from behind the sheet metal with your fingertip.
Fan 1 is directly behind the 5.25-inch drive bay.
Fan 2 is in the middle, between fans 1 and 3.
Fan 3 is closest to the PCI backplane.