IBM iSeries Series Hardware Problem Analysis And Isolation page 68

– SPCN frame-to-frame cable.
This ends the procedure.
50. Perform the following:
a. Follow the SPCN frame-to-frame cable back to the preceding frame in the string.
b. Disconnect the SPCN cable from J16 on the AC module or SPCN card.
c. Connect the negative lead of a multimeter to the system frame ground.
d. Connect the positive lead of a multimeter to pin 2 of J16 on the AC module or SPCN card.
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 J16 on the AC module or SPCN card.
g. 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 "TWRCARD" on page 470) from
which you disconnected the SPCN cable earlier in this step. 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
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
– SPCN frame-to-frame cable
– AC module or SPCN card (see symbolic FRU "TWRCARD" on page 470) in the failing frame or
unit
– AC module or SPCN card (see symbolic FRU "TWRCARD" on page 470) in the preceding
frame of the frame string
This ends the procedure.
Instructions for Models 800, 810, 825, 870, and 890
1. Is the unit that does not power on a shared unit that is switched to the system unit that does not
have a frame to frame cable attached to it?
No: Continue with the next step.
v
Yes: The secondary unit that is switched to the system unit that does not have a frame-to-frame
v
cable attached to it MUST be switched to the system unit with a frame-to-frame cable attached to it
to service it. Do this and continue with the next step.
2. Power on the system.
3. Starting from J15 or J16 on the system unit, go to the first unit in the unit interconnect cable
sequence that does not power on.
4. Is the background light for the Data display on the control panel on, the power on LED blinking, or
are there any characters displayed on the control panel?
Note: The background light is a dim (yellow) light in the Data area on the control panel.
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iSeries: iSeries Server 270, 800, 810, 820, 825, 830, 840, 870, 890, SB2, and SB3 Hardware Problem Analysis and Isolation
, depending on the secondary frame or unit you are
, depending on the secondary frame you are working on.