IBM iSeries Series Hardware Problem Analysis And Isolation page 59

v No: This ends the procedure.
18. Do SPCN optical cables A connect the failing frame B to the preceding frame in the string?
.---------. (A) SPCN
| System | Optical Cables -.
| Unit |
| J15 |
'----.----'
|
.----'----. .-------'-+
| J15 | |
|Frame J16+-+J15 Frame|
| 1 | |
'---------' '---------'
v No: Go to step 20 (See page 48).
v Yes: Remove the SPCN optical adapter A from the preceding frame in the string that cannot
become powered on.
Note: See the Remove and replace procedures topic, or the FC 504x Problem Analysis and Repair
and Parts information (SY44-4934-00), or the Migrated Expansion Tower Problem Analysis, Repair
and Parts manual on the V5R1 Supplemental Manuals web site
frame you are working on.
.---------.
| System |
| Unit |
| J15 |
'----.----'
|
.----'----. .-------'-+
| J15 | |
|Frame J16+-+J15 Frame|
| 1 | |
'---------' '---------'
Continue with the next step.
19. 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 PCC, AC module, or SPCN card
in the frame from which you removed the SPCN optical adapter in step 18 (See page 47).
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.
Is the voltage on both pin 2 and pin 3 from 1.5 V dc to 5.5 V dc?
.----- SPCN
| V
.-. V .-.
| +------------+ |
| +------------+ |
.-------'-+ .---------.
J16| | J15| |
|Frame J16+-+J15 Frame|
2 | | 3 | |
'---------' '---------'
^
'---- (B) Failing Frame
.--- (A) SPCN optical adapter
|
V
.-. .-.
| +------------+ |
| +------------+ |
.-------'-+ .---------.
J16| | J15| |
|Frame J16+-+J15 Frame|
2 | | 3 | |
'---------' '---------'
^
|
'--- Failing frame
Optical
Adapter
|
4 |
|
4 |
, depending on the secondary
Analyze hardware problems
47