IBM pSeries 670 Service Manual page 175

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1. This problem can be caused by any BPD plugged into the failing BPA.

2. The system can have up to three BPDs, depending on the system configuration.

3. Each BPD on the failing BPA must be checked independently.

The following steps check all the BPDs on the side of the BPA (A or B) referenced by the error code that

sent you to this MAP.

Are there any BPDs remaining to be checked?

Exchange the following FRUs one at a time:

v BPC on the side referenced by the error code that sent you to this MAP. Follow all steps in the

removal and replacement procedures for "Bulk Power Controller (BPC)" on page 784.

v Replace the BPE on the side referenced by the error code that sent you to this MAP. Follow all

steps in the removal and replacement procedures for "Bulk Power Enclosure (BPE)" on

After each FRU is exchanged, is the error code that sent you to this MAP still reported?

The problem has been corrected. Go to "MAP 0410: Repair Checkout" in the RS/6000 and

Eserver pSeries Diagnostic Information for Multiple Bus Systems.

Replace the next FRU on the list. If all FRUs on the list have been replaced, call for

Go to "Step 1525-5" on page 156.

Note: Be sure you are working on the side of the BPA (A or B) referenced by the error code that sent you

to this MAP. FRUs on the operating side of the BPA (with BPC GOOD LED on) must not be

disturbed during this procedure.

1. Turn the BPR on/off switch to the off position (to the right).

2. Unplug the BPR to be checked and carefully pull it approximately 25 mm (1 inch) away from the

backplane without unplugging any cables.

If there is more than one BPR left to be checked, start with the uppermost unchecked BPR and make

a note of which BPR you unplugged.

Does the BPC GOOD LED on the BPC come on and stay on?

Replug the BPR and set all the BPR on/off switches on this BPA to the on position (to the left),

and continue with "Step 1525-1" on page 154.

Replace the BPR that is currently unplugged. Follow all steps in the removal and replacement

procedures for "Bulk Power Regulator (BPR)" on page 783. Go to "Step 1525-6" on page 156.

Chapter 3. Maintenance Analysis Procedures

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