IBM i 830 Repair Manual page 61

Yes No
↓
Exchange the power control compartment, AC module, or SPCN card
(BKSPCN or TWRCARD) in the frame from which you removed the
SPCN optical adapter. See the removal and installation procedures in
this book or in the Migrated Expansion Tower Problem Analysis, Repair
and Parts, depending on the secondary frame you are working on.
This ends the procedure.
26. Exchange the following FRUs, one at a time. (See the removal and installation
procedures in this book or in the Migrated Expansion Tower Problem Analysis,
Repair and Parts, depending on the secondary frame you are working on.
v PCC in the failing frame (first frame with a failure indication)
v PCC, AC module, or SPCN card (BKSPCN or TWRCARD) in the preceding
frame in the string
v SPCN optical adapter A in the preceding frame in the string
v SPCN optical adapter B in the failing frame
v SPCN optical cables C between the preceding frame in the string and the
failing frame.
(A) SPCN
Optical
Adapter ────┐
┌─────────┐
│ System │
│ Unit │
│ J15 │
└────┬────┘
│
┌────┴────┐ ┌───────┴─┤
│ J15 │ │
│Frame J16├─┤J15 Frame│
│ 1 │ │
└─────────┘ └─────────┘
This ends the procedure.
27. Perform the following:
a. Power off the system.
b. Disconnect the SPCN frame-to-frame cable from J15 on the PCC of the first
secondary frame that cannot become powered on.
c. Connect the negative lead of a multimeter to the system frame ground.
d. Connect the positive lead of the multimeter to pin 2 of the SPCN cable.
Note: Use an insulated probe or jumper when performing the voltage
readings.
e. Note the voltage reading on pin 2.
f. Move the positive lead of the multimeter to pin 3 of the SPCN cable.
┌───── (C) SPCN
│ Optical Cables
│ │
│ │ ┌─── (B) SPCN
│ │ │ Optical
│ │ │ Adapter
│
┌─┐ ┌─┐
│ ├────────────┤ │
│ ├────────────┤ │
┌───────┴─┤ ┌─────────┐
J16│ │ J15│ │
│Frame J16├─┤J15 Frame│
2 │ │ 3 │ │
└─────────┘ └─────────┘
│
│
└───Failing Frame
Chapter 1. Starting Problem Analysis
Power Problems
│
4 │
47