Map 1529: There Is A Bulk Power Assembly (Bpa) Communication Failure - IBM pSeries 670 Service Manual

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MAP 1529: There Is A Bulk Power Assembly (BPA) Communication

Check the position of the on/off switch on the BPRs.

Is the switch in the ON position (to the left)?

Set the switch to the ON position (to the left), and go to "MAP 0410: Repair Checkout" in the

RS/6000 and Eserver pSeries Diagnostic Information for Multiple Bus Systems.

Go to "Step 1529-2".

Note: Read the Danger and Caution notices under "Safety Notices" on page xi before continuing with this

Prepare a multimeter to measure up to 600 V ac.

2. Use the multimeter to measure the ac voltage at the following test points on the face plate of the BPA

that is not referenced by the error code that sent you to this MAP:

v Phase A and phase B

v Phase B and phase C

v Phase C and phase A

Are all the readings greater than 180 V ac?

Go to "Step 1529-3" on page 164.

Exchange the following FRUs one at a time:

1. BPR 1, that is connected to the IBF not referenced in the error code that brought you to this

MAP. Follow all steps in the removal and replacement procedures for "Bulk Power Regulator

(BPR)" on page 783.

2. BPR 2, that is connected to the IBF not referenced in the error code that brought you to this

MAP. Follow all steps in the removal and replacement procedures for "Bulk Power Regulator

(BPR)" on page 783.

3. BPR 3, that is connected to the IBF not referenced in the error code that brought you to this

MAP. Follow all steps in the removal and replacement procedures for "Bulk Power Regulator

(BPR)" on page 783.

4. BPC on the other side not 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

5. BPE on the other side not 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

Chapter 3. Maintenance Analysis Procedures

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