IBM iSeries Series Hardware Problem Analysis And Isolation page 66

v No: Go to step 48 (See page 55).
v Yes: Remove the SPCN optical adapter A from the preceding frame in the string that cannot
become powered on. See Remove and replace procedures in the Repair and Parts information for
the system.
.---------.
| System |
| Unit |
| J15 |
'----.----'
|
.----'----. .-------'-+
| J15 | |
|Frame J16+-+J15 Frame|
| 1 | |
'---------' '---------'
47. Perform the following:
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 46 (See page 53).
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.
Is the voltage on both pin 2 and pin 3 from 1.5 V dc to 5.5 V dc?
v No: Exchange the AC module or SPCN card (see symbolic FRU "BKSPCN" on page 286 for the
system, or see symbolic FRU "TWRCARD" on page 470 in the frame from which you removed the
SPCN optical adapter. See the Remove and replace procedures topic, or in the Migrated
Expansion Tower Problem Analysis, Repair and Parts manual on the V5R1 Supplemental Manuals
web site , depending on the secondary frame you are working on.
This ends the procedure.
v Yes: Exchange the following FRUs, one at a time. See the Remove and replace procedures topic,
or the Migrated Expansion Tower Problem Analysis, Repair and Parts manual on the V5R1
Supplemental Manuals web site
– AC module or SPCN card (see symbolic FRU "TWRCARD" on page 470) in the failing frame
(first frame with a failure indication)
– AC module or SPCN card (see symbolic FRU "BKSPCN" on page 286 or "TWRCARD" on page
470) in the preceding frame in the string
– SPCN optical adapter A in the preceding frame in the string
– SPCN optical adapter B in the failing frame
– SPCN optical cables C between the preceding frame in the string and the failing frame.
54
iSeries: iSeries Server 270, 800, 810, 820, 825, 830, 840, 870, 890, SB2, and SB3 Hardware Problem Analysis and Isolation
.--- (A) SPCN Optical adapter
|
V
.-. .-.
| +------------+ |
| +------------+ |
.-------'-+ .---------.
J16| | J15| |
|Frame J16+-+J15 Frame|
2 | | 3 | |
'---------' '---------'
^
|
'--- Failing frame
, depending on the secondary frame you are working on.
|
4 |