Bulk Power Subframe
Before performing these procedures, read “Safety Notices” on page xiii.
Removal
1. Make a note of the locations of parts you remove during this procedure so that you
can reinstall them in the correct positions.
2. Power off the system (see “Powering Off and Powering On the System” on
page 492).
3. Disconnect the ac power cords.
4. Remove the front and rear system covers (see “Covers” on page 494).
Refer to “Internal Shields (Front and Rear)” on page 542 for shields and then
perform the following step from the front of the system.
5. Remove the front power shield covering the bulk power supplies.
Refer to “Bulk Power Supplies and Front Blowers (Front View)” on page 548 for bulk
power subframe parts and then perform the following steps from the front of the system.
6. Remove the screws from the bulk power supplies and blower assemblies.
7. Slide out the bulk power supplies and blower assemblies far enough so that they
are disconnected from their power connectors.
Refer to “AC Box Assembly and Rear Blowers (Rear View)” on page 550 for ac box and
rear blowers, and then perform the following steps from the rear of the system.
8. Remove the ac box.
9. Remove the rear blower EMC shield.
10. Remove the rear blowers.
Refer to “Internal Shields (Front and Rear)” on page 542 for system rack regulator EMC
shield and then perform the following steps from the front of the system.
11. Remove the system rack regulator EMC shield that covers the power regulators.
Refer to “Front Electronics Cage and System Backplane Assembly” on page 552
for system rack regulators and then perform the following steps from the front of
the system.
12. Mark the regulators and their locations so that you can reinstall them in the correct
locations.
13. Remove the power regulators.
Refer to “Rear Electronics Cage” on page 554 for SPCN card and then perform the
following step from the rear of the system.
14. Go to “Rear Cage” on page 505 and perform steps 1 through 9 then return here.
15. Carefully remove the top row of screws that are near the alignment pins inside the
system rack regulator cage. Do not allow the screws to be dropped down inside
the system.
16. Remove the screws that are near the connectors in the lower-left and lower-right
corners inside the system rack regulator cage.
17. Remove the screws in the right cage retaining bracket, and remove the bracket.
Chapter 9. Removal and Replacement Procedures 501
To Next Page
Loading...
