Yes Go to step 6.
6. Perform the following:
a. Power off the system.
b. Remove the bulk power supply that is installed.
c. Install one of the other bulk power supplies that was removed in step 5 on
page 114.
d. Power on the system.
Does a power supply reference code occur?
No The bulk power supply you just removed in step 6 is failing, replace the
bulk power supply.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
Yes Go to step 7.
7. Perform the following:
a. Power off the system.
b. Exchange the SPCN card.
c. Power on the system.
Does a power supply reference code occur?
No The SPCN card you exchanged is failing, replace the SPCN card.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
Yes Go to step 8.
8. Exchange the system backplane assembly.
This ends the procedure.
9. Perform the following:
a. Power off the system.
b. Install one of the bulk power supplies that was removed in step 5 on page 114
of this procedure.
c. Power on the system.
Does a power supply reference code occur?
No Go to step 10.
Yes The bulk power supply you installed in this step is failing, replace the bulk
power supply.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
10. Have you installed all of the bulk power supplies that were removed in step 5
on page 114?
No Go to step 9.
Chapter 3. Maintenance Analysis Procedures 115
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