IBM i 830 Repair Manual page 60

Power Problems
23. Do SPCN optical cables A connect the failing frame B to the preceding frame
24. Remove the SPCN optical adapter A from the preceding frame in the string
25. Perform the following:
46
iSeries Model 830, 840, SB2, and SB3 Problem Analysis, Repair and Parts V5R1
v Frame control panel
v SPCN frame-to-frame cable
This ends the procedure.
in the string?
┌─────────┐ (A) SPCN
│ System │ Optical Cables ─┐
│ Unit │
│ J15 │ ┌─┐
└────┬────┘ │ ├────────────┤ │
│ │ ├────────────┤ │
┌────┴────┐ ┌───────┴─┤
│ J15 │ │ J16│
│Frame J16├─┤J15 Frame│
│ 1 │ │ 2 │
└─────────┘ └─────────┘
Yes No
↓
Go to step 27 on page 47 of this procedure.
that cannot become powered on. 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.
┌─────────┐ ┌─── (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 PCC, AC
module, or SPCN card in the frame from which you removed the SPCN
optical adapter in step 24 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 PCC.
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?
┌───── SPCN
│ Optical
┌─┐ Adapter
┌───────┴─┤ ┌─────────┐
│ J15│ │ │
│Frame J16├─┤J15 Frame│
│ 3 │ │ 4 │
└─────────┘ └─────────┘
└──── (B) Failing Frame
┌─┐
┌───────┴─┤ ┌─────────┐
│ J15│ │ │
│Frame J16├─┤J15 Frame│
│ 3 │ │ 4 │
└─────────┘ └─────────┘
│
└─── Failing Frame