Power BackplaneThe following procedures cover removal and replacement of the power backplane.Removal1. If you have not already done so, shut down the system as described in “Stoppingthe System” on page 254.2. If you have not already done so, unplug the system power cables from the electricaloutlet.3. If your system is a Model 6C1 (rack mount), place the system in the service positionas described in “Placing the Model 6C1 in the Service Position” on page 255.4. If you have not already done so, remove the service access cover as described in“Covers” on page 258.5. Remove the power supplies as described in “Power Supply” on page 282.6. Disconnect the cables from the power backplane.7. Push down on the release lever (1) and remove the power backplane.1Replacement1. Replace in reverse order.290 Service Guide