IBM RS/6000 SP, Maintenance Information

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MAP 0220: Wide Processor Node Power
008
No problem detected.
– Record reason for power-off condition.
– Go to “MAP 0570: End of Call” on page 1-357.
009
– Go to Step 010
010
– Check circuit breaker at front of processor node. Put this circuit breaker in the On (‘1’) position if it is not
already.
Does the circuit breaker go (trip) to the Off (‘0’) position?
Yes No
011
– Go to Step 015 on page 1-107.
012
– Place processor node in service position.
– Check node power harness (at power card N00-PC-P1 and N00-PC-P2 and circuit breaker) inside
processor node for any obvious problems which might cause a short.
Does node power harness appear okay?
Yes No
013
– Fix obvious problem(s). If necessary, replace node power harness.
– Remove processor node from service position.
– Reconnect all cables at rear of the processor node.
– Go to Step 010.
014
– Put circuit breaker in On (’1’) position.
– Using multimeter, check for a short between either tab of circuit breaker and a dc converter heatsink
screw on the power card.
– Perform ‘Actions’ from table one at a time until 48 V short disappears:
Order Action Replace
1 Unplug P102 from node supervisor. Node supervisor card.
2 Unplug P60 from power card. Replace N00-PC-P60 cable.
3 Both unplugged. Replace node power card.
– If “Action” above removes short condition, replace the corresponding part in the “Replace” column.
– Remove processor node from service position.
– Reconnect all cables at rear of the processor node.
– Go to Step 010.
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RS/6000 SP MAPs