Fc 5094, Fc 9094 - Power Distribution Backplane - Pb1 - IBM iSeries 270 Service Manual

To remove or replace the display panel - NB1:
1. Power off the expansion tower. See Expansion unit power procedure.
2. Disconnect the ac power cord from the expansion tower. Note that dual line cord units have two power
cords.
3. Open the front cover. See FC 5074, FC 5079, FC 5094, FC 5294, FC 9079, FC 9094 - Covers.
4. Pull on the two side fasteners to release the display panel assembly.
5. Slide the panel partially out of the frame.
6. Disconnect the cables that are attached to the backside of the display panel.
7. Remove the display panel from the frame.
8. Reverse the above procedure to install the new panel.
9. After exchanging an item, go to Verify the repair.
This ends the procedure.

FC 5094, FC 9094 - Power distribution backplane - PB1

For use by authorized service providers.
Use this procedure to remove or replace the power distribution backplane - PB1 in an FC 5094 or FC
9094.
To remove or replace the power distribution backplane:
1. You must remove both disk unit backplanes DB1 and DB2 before continuing with this procedure.
Perform FC 5094, FC 9094 - Device boards - DB1 and DB2 for each backplane. After you have
removed both disk unit backplanes, return here and continue with the next step of this procedure.
2. Remove the rear cover. See FC 5074, FC 5079, FC 5094, FC 5294, FC 9079, FC 9094 - Covers.
3. Remove the PCI drawer. See FC 5094, FC 9094 - Tower card - CB1.
4. Remove the AC module. See FC 5094, FC 9094 (with single line cord) - AC module - A01 or FC
5094, FC 9094 (with dual line cord) - AC module - A01 and A02.
5. Remove all power supplies in the unit being worked on. See FC 5094, FC 9094 - Power supply -
P00, P01, P02, and P03.
6. Remove the screws from the power subframe assembly.
7. From the front of the unit, reach through and remove the cables from the backside of the power
distribution backplane and note their locations.
8. From the rear of the unit, remove the mounting screws that hold the power distribution backplane to
the unit.
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Hardware (Remove and Replace; Part Locations and Listings)