IBM RS/6000 SP, Maintenance Information

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MAP 0460: Scalable Electrical Power Base Unit
060 (continued)
Are any indicating a “dc Power Loss” (red) condition?
Yes No
061
Problem resolved.
– Go to Step 077 on page 1-278 to verify fix.
062
Other problems exist.
– Go to Step 054 on page 1-274.
063
Possible short in 48 V dc power distribution.
– Go to Step 064
064
Possible short in 48 V dc power distribution.
– Switch all processor node and switch assembly circuit breakers to Off (‘0’) position.
– Disconnect dc distribution cables PDU-BH-P1, PDU-BH-P2, PDU-BH-P3, PDU-BH-P4, and PDU-BH-P5
at SEPBU. This isolates 48 V dc to the SEPBU only.
– 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
065
– Probable short in dc distribution cables.
– Go to Step 009 on page 1-259, to continue service.
066
Is the power control interface (PCI) card switch (in the rear of the SEPBU, next to the frame super-
visor card) in the AUX position?
Yes No
067
Probable dc short in the SEPBU.
– Put the circuit breaker in the front of each power module in the Off (‘0’) position.
– Unseat all power modules from the SEPBU so that they are out at least three inches (10 centime-
ters) from the SEPBU power chassis.
– One-at-a-time, reseat the power module(s) and put the circuit breaker of the power module in the
On (‘1’) position.
– Check frame supervisor green LED #1 and/or green LED #2 for an OFF condition.
(Step 067 continues)
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RS/6000 SP MAPs