IBM iSeries Series User Manual

v SPCN card (see symbolic FRU “TWRCARD” on page 470) in the failing unit (first frame with a
failure indication)
v SPCN card (see symbolic FRU “TWRCARD” on page 470) in the preceding unit in the string
v SPCN optical adapter A in the preceding unit in the string
v SPCN optical adapter B in the failing unit
v SPCN optical cables C between the preceding unit in the string and the failing unit
(A) SPCN
Optical .----- (C) SPCN
Adapter ----. | Optical Cables
| |
| | .-- (B) SPCN
.---------. | | | Optical
| System | | | | Adapter
| Unit | V | V
| J15 | .-. V .-.
’----.----’ | +------------+ |
| | +------------+ |
.----’----. .-------’-+ .-------’-+ .---------.
|Sec J15 | | Sec J16| |Sec J15| | Sec |
|Unit J16+-+J15 Unit | |Unit J16+-+J15 Unit |
| 1 | | 2 | | 3 | | 4 |
’---------’ ’---------’ ’---------’ ’---------’
^
|
|
’--- Failing Unit
This ends the procedure.
24. Does the SPCN frame-to-frame cable coming from the system unit connect to J15 on the secondary
unit (where the power on light is off or the unit control panel displays a power reference code of 1xxx
xxxx)?
v No: Correct the connection by connecting the SPCN frame-to-frame cable coming from the system
unit to J15 of the secondary unit.
This ends the procedure.
v Yes: Continue with the next step.
25. Perform the following:
a. Power off the system.
b. Disconnect the SPCN frame-to-frame cable from J15 connector of the first unit 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.
g. Note the voltage reading on pin 3.
Figure 8. SPCN cable connector. (RV2A180-1)
Is the voltage on both pin 2 and pin 3 from 1.5 V dc to 5.5 V dc?
v Yes: Exchange the following FRUs, one at a time (see Remove and replace procedures).
– SPCN card (see symbolic FRU “TWRCARD” on page 470) in the failing unit.
– SPCN card (see symbolic FRU “TWRCARD” on page 470) in the preceding unit in the unit
string.
– SPCN frame-to-frame cable.
This ends the procedure.
60 iSeries: iSeries Server 270, 800, 810, 820, 825, 830, 840, 870, 890, SB2, and SB3 Hardware Problem Analysis and Isolation

IBM iSeries Series Specifications

General

Brand	IBM
Model	iSeries Series
Category	Server
Language	English