Power Subsystem - IBM pSeries 690 Service Manual

Power Subsystem

This section contains the removal and replacement procedures for the power subsystem.
Notes:
1. All pluggable BPA FRUs are replaced concurrently with system operation when the removal and
replacement instructions are followed. Exceptions to this occur when multiple failures exist in the BPA.
2. Removal and replacement of the entire BPA enclosure (BPE) is also concurrent with system operation,
unless there are multiple BPE failures.
Attention: Be sure to check for FRU redundancy to determine if the repair can be performed
concurrently. If you cannot determine redundancy, delay the repair until the system can be shut down. See
the "Hot-Pluggable FRUs" on page 858 for more specific details.
Bulk Power Assembly (BPA)
The bulk power assembly is on the top of the rack. This assembly provides power to the whole system.
There are two sides to the BPA so that power is never completely removed from the system unless the
system power is shut down, and the power cables are removed from the customer's power source.
Bulk Power Regulator (BPR)
The BPRs are located in the bottom positions of the bulk power enclosure (BPE).
Notes:
1. Before installing the BPR in the BPE (Bulk Power Enclosure) during a service or repair action, the
Lock/Unlock switch located on the BPR, MUST be set to the Unlock position. Failure to do so may
damage the BPR guide rails in the BPE resulting in extended outages and unnecessary, additional
parts replacement.
2. The field stocks two versions of BPR. The older version is identified by FRU part number 44P1995.
Order the older version of the BPR if you are not replacing all of the BPRs installed in the system and
the firmware on the system is below firmware release 3H030916. Install the upgrade BPR, identified by
FRU part number 44P2645, only if the firmware on the system is 3H030916 or later. Do not mix the
two versions without the firmware level being 3H030916 or later.
3.
Removal
Attention: The BPR unit weighs approximately 12.47 kg (27.5 lbs).
1. Locate the BPR to be replaced.
2. Note the state of the BPR 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. Locate the BPR to be replaced and manually slide its Lock/Unlock switch to unlock (power switch to
the right). At this point, the ENBL (Good) LEDs turn off.
6. If the integrated battery feature (IBF) is installed, manually turn off the IBF circuit breaker attached to
the BPR being repaired. Unplug the battery cable from the front face of the BPR.
7. Loosen the left and right fasteners using the torque tool (part number 6422789). Push up on the BPR
release levers, and slide the unit out of the slot.
Replacement
1. The field stocks two versions of BPR. The older version is identified by FRU part number 44P1995.
Order the older version of the BPR if you are not replacing all of the BPRs installed in the system and
the firmware on the system is below firmware release 3H030916. Install the upgrade BPR, identified by
860 Eserver pSeries 690 Service Guide