Use this procedure to remove or replace the power distribution board - PB1 in an FC 5078, FC 0578, FC
5088, or FC 0588.
To remove or replace the power distribution board - PB1:
1. Remove the top, front, and rear covers. See FC 5078, FC 0578, FC 5088, FC 0588 - Covers.
2. Power down the expansion unit. Pull the power plugs that run from the unit to the ac box of the unit
below. See Power on/off the system and logical partitions.
3. Remove the center top plate.
4. Remove the two power supplies. See FC 5078, FC 0578, FC 5088, FC 0588 - Power supplies - P01
and P02.
5. From the top of the unit, remove and label the cables that connect to the power distribution board.
6. Remove the screws that secure the power distribution board to the expansion unit.
7. Pull the power distribution board out through the top of the expansion unit.
8. Install the power distribution backplane by reversing this procedure.
9. After exchanging an item, go to Verify the repair.
This
ends the procedure.
FC 5078, FC 0578 - Power supplies - P01 and P02
For use by authorized service providers.
Use this procedure to remove or replace the power supplies - P01 and P02 in an FC 5078, FC 0578, FC
5088, and FC 0588.
Attention: Do not power off the system.
Note: Remove and replace only one power supply at a time.
To remove or replace the power supplies - P01 and P02:
1. Do not power off the system if it is powered on.
2. Open the front cover. See FC 5078, FC 0578, FC 5088, FC 0588 - Covers.
3. Remove the ac line cord from the power supply being replaced.
4. Pull down on the docking handle located in the front of the power supply, to release the power supply
from the expansion unit.
5. Remove the power supply.
6. Remove the AMD from the power supply by pulling out on the latch knob and sliding the AMD to the
left towards the latch.
7. Install the new power supply by reversing this procedure.
Note: Do not slam the new power supply when installing it into the system. Insert the power supply
until it engages the frame, then lift the docking handle to lock the power supply into place.
8. After exchanging an item, go to Verify the repair.
This ends the procedure.
FC 5078, FC 0578, FC 5088, FC 0588 - Tower card - CB1
For use by authorized service providers.
Use this procedure in conjunction with the Expansion unit power procedure to remove or replace the tower
card - CB1 in an FC 5078, FC 0578, FC 5088, and FC 0588.
To remove or replace the tower card - CB1:
1. Power off the expansion tower. See the Expansion unit power procedure.
2. Open the rear cover. See FC 5078, FC 0578 - Covers.
Analyze hardware problems 169
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