IBM RS/6000 SP, Maintenance Information

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MAP 0260: 604 or 604e High Node Power
018 (continued)
– Reconnect all cables at rear of the processor node.
– Go to Step 015 on page 1-131.
019
– Using a multimeter, check for a short between any pins in power supplies unit plug.
Was a shorted condition detected?
Yes No
020
– Using a multimeter, check for a short between any pins in node power plug(s).
– Using a multimeter, check for a short between any tabs in circuit breaker(s).
– If a short is detected, isolate it to either the cable or circuit breaker and replace the corresponding
part.
– Remove processor node from service position.
– Reconnect all cables at rear of the processor node.
– Go to Step 015 on page 1-131.
021
– Replace corresponding power supply.
– Remove processor node from service position.
– Reconnect all cables at rear of processor node.
– Go to Step 015 on page 1-131.
022
– From control workstation or processor node, check green LED 1 for this node.
Is green LED 1 off or is ‘No Power to Node’ displayed on the control workstation?
Yes No
023
Processor node problem resolved.
– Go to “MAP 0570: End of Call” on page 1-357.
024
– Check processor node(s) on any other dc power harness for any that are powered on. Ensure that the
other processor node has its circuit breaker in the On (‘1’) position.
– Check the green LED 1 for an On or Flashing condition.
– High processor nodes receive 48-volt power by connecting to four power plugs, possibly connecting to
two of the 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
PDU-BH-P21: first SMP Node 1
PDU-BH-P22:
Second SMP Node 5
PDU-BH-P23: Third SMP Node 9
PDU-BH-P24:
Fourth SMP Node 13
(Step 024 continues)
1-132
RS/6000 SP MAPs