Does the same SRC occur ?
Yes No
↓ Follow the service actions for the new SRC.
2. Is this system a Model 830 with SB2 System Unit and FC 9074 ?
Yes No
↓ Go to Step 4 of this procedure.
3. See “Locations — Models 830, SB2 System Unit with FC 9074 Base I/O Tower”
on page 709.
Replace the following FRUs in order one at a time until the problem is
resolved. See “Chapter 4. Removal and Installation Procedures” on page 617.
Note: Be sure to IPL in SLOW OVERRIDE mode after each replacement.
a. Processor Card in location M04 in the System Unit
4. This is a Model 840, SB3 System Unit and FC 9079 Base I/O Tower.
See “Locations — Models 840, SB3 System Unit with Processor Tower and FC
9079 Base I/O Tower” on page 719. Replace the following FRUs in order one at
a time until the problem is resolved. See “Chapter 4. Removal and Installation
Procedures” on page 617.
Note: Be sure to IPL in SLOW OVERRIDE mode after each replacement.
a. Processor Card 3 in location M16 in the System Unit
This ends the procedure.
PWROC
A power supply is reporting a load fault.
Perform the following to determine the failing part:
1. Is the SRC 1xxx 1810, 1820, 1830, or 1840?
No Yes
↓ Perform ″POW-PIP6″ in Migrated Expansion Tower Problem Analysis,
Repair and Parts manual to isolate the failing item.
The failing item may be one of the following parts:
v Any part on the system bus.
v Power Supply P01 – part 90H6629
v Power Supply P02 – part 90H6629
v Power Supply P03 – part 90H6629
2. Is the SRC 1xxx 1B01, 1B02, 1B03, 1B04,1B05, 1B06 or 1B07 or 1B09?
No Yes
↓ Use the following except for FC 5078/0578 and perform “Power PIP6”
on page 389 to isolate the failing item.
The failing item may be one of the following parts:
v Any part on the system bus.
v Power Supply P01 (single line cord) – part 90H6629
v Power Supply P01 (dual line cord) – part 21P5383
v Power Supply P02 (single line cord) – part 90H6629
Symbolic FRUs
Chapter 3. Problem Isolation Procedures (PIPs), Failing Items, and Symbolic FRU Isolation 571
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