IBM RS/6000 SP, Maintenance Information

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MAP 0160: Thin Processor Node Power
015 (continued)
Is Power (green) LED Off?
Yes No
016
Processor node problem resolved.
– Go to “MAP 0570: End of Call” on page 1-357.
017
– Check processor node(s) on any other dc power harness for any that are powered on. Ensure that the
other processor has its circuit breaker in the On (‘1’) position.
– Check the Power (green) LED for an On or Flashing condition.
– Processor nodes receive 48-volt power through one of four power harnesses. The sets of processor
nodes are as follows:
PDU-BH-P1: Processor nodes 1, 2, 3, 4
PDU-BH-P2: Processor nodes 5, 6, 7, 8
PDU-BH-P3: Processor nodes 9, 1ð, 11, 12
PDU-BH-P4: Processor nodes 13, 14, 15, 16
Is the Power (green) LED on other processor(s) nodes On or Flashing?
Yes No
018
– Go to “MAP 0370: Main Power” on page 1-222.
019
– Check all other processor nodes on the same dc power harness as the failing processor node to check
for the same symptom - circuit breaker on but Power (green) LED not lit.
Is this the only processor node showing this symptom?
Yes No
020
Problem with 48 V dc power distribution.
– Go to “MAP 0480: Open in 48 V dc Distribution” on page 1-283
021
– Check cable connection at processor node tailgate N00-BH-J8 for a good connection.
Is there a good connection?
Yes No
022
– Fix cable connection problem.
– Go to Step 015 on page 1-70.
023
– Place processor node in service position.
– Put circuit breaker at front of processor node in the On (‘1’) position
– Unplug 48 V dc harness N00-NS-P110 from node supervisor card.
(Step 023 continues)
Chapter 1. Maintenance Analysis Procedures (MAPs)
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