This ends the procedure.
BUSPWR
There is a problem with the +29V Bus.
Attention: AC power must be removed from the system before removing or
installing regulator 3.
Perform the following:
1. Is the SRC 1xxx 1200 displayed?
Yes No
↓ Go to “Starting Point for All Problems” on page 4.
2. Perform the following:
a. Remove regulators R01 to R10 (except R3) R11 and R20 from the system
unit.
b. Power on the system.
Is the SRC 1xxx 1200 displayed?
Yes No
↓ Go to step 15 on page 511 of this procedure.
3. Perform the following:
a. Remove one of the AMDs from the system not previously removed during
this procedure.
b. Power on the system.
Is the SRC 1xxx 1200 displayed?
Yes No
↓ The AMD you removed in this step is the failing item.
This ends the procedure.
4. Have you removed all of the AMDs one at a time?
No Yes
↓ Install all AMDs and go to step 6 of this procedure.
5. Perform the following:
a. Install the AMD that was removed in step 3 of this procedure.
b. Go to step 3 of this procedure.
6. Perform the following:
a. Power off the system.
b. Remove the battery power unit charger.
c. Power on the system.
Is the SRC 1xxx 1200 displayed?
Yes No
↓ The battery power unit charger that you removed in this step is the
failing item.
This ends the procedure.
7. Perform the following:
a. Remove all except one of the bulk power supplies from the system.
Symbolic FRUs
Chapter 3. Problem Isolation Procedures (PIPs), Failing Items, and Symbolic FRU Isolation 509
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