c. Remove all the bus load (processor and memory cards, do not remove the
clock card).
d. Power on the system.
Is SRC 1xxx1200 displayed?
No Go to step 16.
Yes The regulator assembly you just installed is failing, replace the regulator
assembly.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
16. Have you installed all the regulators that were removed in step 1 on
page 102?
No Go to step 15 on page 104.
Yes This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
This ends the procedure.
The SRC Table Directed You Here and the SRC is 1xxx120y or 1xxx140y
A power regulator card in the system rack is failing.
1. Perform the following:
Attention: The ac power cable must be disconnected from the system rack before
removing or installing regulator assemblies R04, R05, or R06.
Is SRC 1xxx140x displayed?
No Go to step 2.
Yes Go to step 23 on page 108.
2. Is SRC 1xxx1201 displayed?
No Go to step 6 on page 106.
Yes Go to step 3.
3. Perform the following:
a. Power off the system.
b. Remove the load cards (memory cards M01-M03, M08-M10, M11-M15,
M20-M24, and processors at M05, M06, M16, and M18).
c. Power on the system.
Does the system power on?
No Go to step 23 on page 108.
Yes Go to step 4.
4. Perform the following:
a. Power off the system.
b. Install one of the Mxx load cards that was removed in step 3.
Chapter 3. Maintenance Analysis Procedures 105
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