IBM RS/6000 SP, Maintenance Information

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MAP 0400: Supervisor Power 12 Volts DC Problem
018 (continued)
Has short disappeared?
Yes No
019
– Replace backplane card.
– Go to Step 043 on page 1-242 to verify fix.
020
– Replace frame supervisor card.
– Go to Step 043 on page 1-242 to verify fix.
021
– Replace tailgate cable(s) PDU-FC-P406 and/or PDU-FC-P408, whichever is causing the short
condition.
– Go to Step 043 on page 1-242 to verify fix.
022
– Short detected on a supervisor harness.
– Reconnect cables PDU-BH-P7 and PDU-BH-P8 one-at-a-time, checking for a short condition between
connector card PDU-FC-J402, pin 1 and pin 2 each time.
Do you detect a short condition after reconnecting either cable?
Yes No
023
No short detected.
– Call next level of support.
024
Short isolated to a single supervisor harness.
– Disconnect the shorted supervisor harness from the processor node(s) N00-BH-J8 and/or switch assem-
blies HPS-BH-J2 (one-at-a-time), until the short condition disappears, or the supervisor harness is
entirely disconnected.
Does the short condition disappear by disconnecting the supervisor harness from a processor
node(s) and/or switch assemblies?
Yes No
025
– Replace this supervisor harness.
– Go to Step 043 on page 1-242 to verify fix.
026
Short is inside a processor node or switch assembly.
– Go to Step 027.
027
(Step 027 continues)
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RS/6000 SP MAPs