IBM RS/6000 SP, Maintenance Information

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MAP 0460: Scalable Electrical Power Base Unit
008 (continued)
Is ac present and within 200-415 V ac?
Yes No
009
– Refer to "Replacing the SEPBU ac Line Cord" in IBM RS/6000 SP: Maintenance Information,
Volume 3, Locations and Service Procedures.
– Go to Step 077 on page 1-278 to verify fix.
010
– One-at-a-time, install power modules, each time putting the circuit breaker at the front of the power
module in the On (‘1’) position and repeating the ac voltage measurement from Step 002 on
page 1-267.
Was an ac voltage problem detected when any power module was reinstalled?
Yes No
011
All power modules were installed with no ac problem detected.
– Go to Step 077 on page 1-278 to verify the SEPBU.
012
– Refer to "Replacing the SEPBU Power Module" in
IBM RS/6000 SP: Maintenance Information, Volume
3, Locations and Service Procedures to replace the SEPBU power module.
– Return to Step 010 to install next power module and/or verify the replacement.
013
Possible problem with 12 V dc supervisor power.
– Put main power switch in the On (‘1’) position.
– Verify that the power module(s) circuit breaker(s) are in the On (‘1’) position.
– Disconnect cables PDU-BH-P7 and PDU-BH-P8.
– Check frame supervisor LEDs and SEPBU rear panel LED.
Are any LEDs lit?
Yes No
014
– Check for only one power module installed in the SEPBU.
Is there only one power module in the SEPBU?
Yes No
015
More than one power module in SEPBU.
– Go to Step 032 on page 1-272 to verify fix.
016
Single power module in SEPBU.
– Refer to "Replacing the SEPBU Power Module" in
IBM RS/6000 SP: Maintenance Information,
Volume 3, Locations and Service Procedures to replace the SEPBU power module.
(Step 016 continues)
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-269