IBM pSeries 690 Service Manual page 879

Bulk Power Distributor (BPD)
There can be two BPDs, located immediately above the BPC. If only one BPD is required, an airflow baffle
must installed in the top BPD position.
Attention: This service procedure may produce other power error code(s) (101x xxxx) between the time
the Start Service button is pressed, and the Service Complete button is pressed, during concurrent
repair. If normal system operation continues, as described by this procedure, ignore these error codes.
Removal
Attention: The BPD unit weighs approximately 2.27 kg (5 lbs).
1. Locate the BPD to be replaced.
2. Note the state of the BPD ENBL (Good) LED.
3. Press the green Start Service button on the UEPO switch.
4. Proceed only if the ENBL (Good) LED goes off or the repair has been scheduled. If the repair has
been scheduled, power off the system as described in "Powering Off and Powering On the System" on
page 854, then return here.
5. Check the ENBL (Good) LED for all the BPRs (LED on right side of FRU) on same BPA side. For each
BPR that has this LED in the ON state, manually slide the power switches to the right.
Attention: Do not switch off units where this LED is already off.
6. Verify that all cables are labeled for plug location and then unplug the cables from the BPD.
7. Loosen the left and right fasteners using the torque tool (part number 6422789). Slide the unit out of
the slot.
Replacement
Attention: Before proceeding, make sure that all the BPR ENBL (Good) LEDs are OFF. For each BPR
that has this LED in the ON state, manually slide the power switches to the right. Do not switch off units
where this LED is already off.
Attention: Make sure that the UEPO bypass switch on the BPC is in the BYPASS position.
1. Slowly slide the BPD into the slot and carefully seat the BPD against the backplane.
2. Tighten the left and right fasteners with the torque tool.
3. Plug all cables to the BPD, ensuring that the plug location and the cable label agree.
4. Manually move any BPR power switches that are to the right (OFF) position, to the left (ON) position.
5. Move the UEPO bypass switch to the NORMAL position.
6. Press the white Service Complete button on the UEPO switch to indicate completion of this
procedure. The BPA automatically configures as it powers on.
7. If a high performance switch is installed in or attached to the system, perform the steps described in
"Frame (Power Subsystem) Firmware Update with a pSeries High Performance Switch Installed" on
page 825 to insure that the new BPD contains the correct code.
Chapter 9. Removal and Replacement Procedures
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