IBM RS/6000 SP, Maintenance Information

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MAP 0240: Wide Processor Node DC Short/Open
018 (continued)
Problem involves DASD(s).
– Clip multimeter leads to the connector pins for the voltage that shows resistance out of range.
– Unplug the DASD one-at-a-time until both DASD have been removed or resistance enters acceptable
range.
Did removing the DASD(s) make the short disappear?
Yes No
019
– Replace this DASD power cable: N00-PC-P45 or N00-PC-P65.
– Go to Step 021 to verify fix.
020
– Replace the DASD that is causing the short condition.
– Go to Step 021 to verify fix.
021
Part was replaced.
– Recheck resistance per Step 001 on page 1-120.
Is resistance in the acceptable range?
Yes No
022
Problem not resolved.
– Call next level of support.
023
Problem resolved.
– Remove processor node from service position.
– Reconnect all cables at rear of the processor node.
– Put circuit breaker at front of processor node in the On (‘1’) position.
– Go to “MAP 0570: End of Call” on page 1-357.
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-123