Power Good Problem Isolation
Attention: The ac power cable must be disconnected from the system rack before
removing or installing regulators R04, R05, or R06.
1. Perform the following:
a. Power off the system.
b. Exchange the SPCN card.
c. Power on the system.
Does SRC 1xxx640x continued to be displayed?
No The SPCN card that was removed 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 2.
2. Perform the following:
a. Power off the system.
b. Remove one of the regulators in position R01, R02, R04-R10 and install a new
regulator assembly.
Note: There are three part numbers associated with the regulators at these
locations.
c. Power on the system.
Is SRC 1xxx640x displayed?
No The regulator assembly that was removed in this step is failing, replace the
failing regulator assembly.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
Yes Go to step 3.
3. Perform the following:
a. Power off the system.
b. Remove the new regulator that was installed in step 2 and replace it with the
original regulator.
c. Remove one of the untested regulators from position R01, R02, or R04-R10 and
install a new regulator assembly.
d. Power on the system.
Is SRC 1xxx640x displayed?
No The regulator assembly that was removed in this step is failing, replace the
failing regulator assembly.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
112 Service Guide
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