IBM RS/6000 SP, Maintenance Information

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MAP 0460: Scalable Electrical Power Base Unit
054 (continued)
– 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 with the new
power module obtained in Step 051 on page 1-274.
Note: This step may be done while system is in use if the SEPBU has N+1 power modules and
there is never more than one module powered off or removed from the SEPBU at a time.
– Wait for the system monitor to update the “Frame Environment” window, then check for “dc Power
Loss” (red) indication.
Does the new power module give a “dc Power Loss” (red) indication?
Yes No
055
Original power module is bad.
– Replace the original power module(s).
– Go to Step 077 on page 1-278 to verify fix.
056
– Reinstall the original power module.
– Refer to "Replacing the SEPBU Frame Supervisor Card" in
IBM RS/6000 SP: Maintenance Infor-
mation, Volume 3, Locations and Service Procedures.
Does the same power module give a “dc Power Loss” (red) indication?
Yes No
057
Problem resolved.
– Go to Step 077 on page 1-278 to verify fix.
058
– Refer to "Replacing the SEPBU Power Control Interface (PCI) Card" in IBM RS/6000 SP: Mainte-
nance Information, Volume 3, Locations and Service Procedures to replace the SEPBU power
chassis.
– Go to Step 077 on page 1-278 to verify fix.
059
– From the “Frame Environment” window, power on the power modules by clicking on the On button cor-
responding to the first power module.
– Wait for the system monitor to update the “Frame Environment”window, then check for “dc Power Loss”
(red) conditions for all power modules.
Are all power modules still indicating a “dc Power Loss” (red) condition?
Yes No
060
Some power modules are active.
(Step 060 continues)
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-275