IBM i 830 Repair Manual page 68

Power Problems
63. Remove the SPCN optical adapter A from the preceding frame in the string
64. Perform the following:
65. Exchange the following FRUs, one at a time. See the removal and installation
54
iSeries Model 830, 840, SB2, and SB3 Problem Analysis, Repair and Parts V5R1
that cannot become powered on. See "Removal and Installation Procedures" in
the Repair and Parts information for the system.
┌─────────┐ ┌─── (A) SPCN Optical Adapter
│ System │ │
│ Unit │
│ J15 │ ┌─┐
└────┬────┘ │ ├────────────┤ │
│ │ ├────────────┤ │
┌────┴────┐ ┌───────┴─┤
│ J15 │ │ J16│
│Frame J16├─┤J15 Frame│
│ 1 │ │ 2 │
└─────────┘ └─────────┘
a. Connect the negative lead of a multimeter to the system frame ground.
b. Connect the positive lead of a multimeter to pin 2 of J16 on the AC
module or SPCN card in the frame from which you removed the SPCN
optical adapter in step 63 of this procedure.
Note: If you are working on a system unit, the cable may be connected to
either J15 or J16. Use an insulated probe or jumper when
performing the voltage readings.
c. Note the voltage reading on pin 2.
d. Move the positive lead of the multimeter to pin 3 of J16 on the AC module
or SPCN card.
e. Note the voltage reading on pin 3.
5 4 3 2 1
9 8 7 6
RV2A179-1
Is the voltage on both pin 2 and pin 3 from 1.5 V DC to 5.5 V DC?
Yes No
↓
Exchange the AC module or SPCN card (BKSPCN for the system or
TWRCARD in a FC 5065 tower) 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.
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 AC module or SPCN card (TWRCARD) in the failing frame (first frame
with a failure indication)
v 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
┌─┐
┌───────┴─┤ ┌─────────┐
│ J15│ │ │
│Frame J16├─┤J15 Frame│
│ 3 │ │ 4 │
└─────────┘ └─────────┘
│
└─── Failing Frame