IBM RS/6000 SP, Maintenance Information

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MAP 0420: Main Power Switch
DANGER
High voltage present. Perform “Lockout/Tagout Procedure for PDU” on page 1-2 or
“Lockout/Bagout Procedure for PDU” on page 1-3 to remove primary power to the
frame.
– Open Power Distribution Unit ac power section.
– Check for continuity between contactor pin A1 and PDU-BH-J6 pin 2 and pin 5.
– Check for continuity between 24 V supervisor power terminal and PDU-BH-J6 pin 4.
Is there continuity in all cases?
Yes No
014
– Replace cables as required.
– Reconnect ac power and power on system.
– Go to Step 002 on page 1-247 to verify fix.
015
– Call next level of support.
016
– Main power LED card should be replaced; however, this action requires powering off all processor
nodes.
Are there other problems requiring this frame to be powered off?
Yes No
017
Schedule maintenance to replace main power LED card.
Go to “MAP 0570: End of Call” on page 1-357
018
Replace main power LED card.
Go to “MAP 0570: End of Call” on page 1-357
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-249