IBM iSeries 820 Hardware Problem Analysis And Isolation

16. Is the SRC 1xxx xx2E?
v No: Go to “Starting point for all problems” on page 2.
v Yes: Continue with the next step.
17. Do SPCN optical cables A connect the failing unit B to the preceding unit in the string?
v No: Go to step 19 (See page 59).
v Yes: Continue with the next step.
.---------. (A) SPCN
| System | Optical Cables -. .----- SPCN
| Unit | | V Optical Adapter
| J15 | .-. V .-.
’----.----’ | +------------+ |
| | +------------+ |
.----’----. .-------’-+ .-------’-+ .---------.
| J15 | |Sec J16| |Sec J15| | Sec |
|Sec Unit +-+UNIT J15| |Unit J16+-+J15 Unit |
| 1 | | 2 | | 3 | | 4 |
’---------’ ’---------’ ’---------’ ’---------’
^
|
’---- (B) Failing Unit
18. Remove the SPCN optical adapter A from the preceding frame in the string that cannot become
powered on. See Remove and replace procedures for the system.
.---------. .--- (A) SPCN Optical Adapter
| System | |
| Unit | V
| J15 | .-. .-.
’----.----’ | +------------+ |
322 | +------------+ |
.----’----. .-------’-+ .-------’-+ .---------.
| J15 | |Sec J16| |Sec J15| | Sec |
|Sec Unit +-+Unit J15| |Unit J16+-+J15 Unit |
| 1 | | 2 | | 3 | | 4 |
’---------’ ’---------’ ’---------’ ’---------’
^
|
’-- Failing Unit
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 in the unit from which you removed the
SPCN optical adapter in the previous step of this procedure.
Notes:
v If you are working on a system unit, the cable may be connected to either J15 or J16.
v Use an insulated probe or jumper when performing the voltage readings.
20.
Note the voltage reading on pin 2.
21. Move the positive lead of the multimeter to pin 3 of J16 on the AC module or SPCN card.
22. Note the voltage reading on pin 3.
Figure 7. J16 on AC module
Is the voltage on both pin 2 and pin 3 from 1.5 V dc to 5.5 V dc?
v No: Exchange SPCN card (see symbolic FRU “TWRCARD” on page 470) in the unit from which
you removed the SPCN optical adapter (see the Remove and replace procedures for the
secondary unit you are working on.
This ends the procedure.
v Yes: Continue with the next step.
23.
Exchange the following FRUs, one at a time (see the Remove and replace procedures.
Analyze hardware problems 59

IBM iSeries 820 Specifications

General

Brand	IBM
Model	iSeries 820
Category	Server
Language	English