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: Continue with the next step.
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
, depending on the secondary frame you are working on.
– PCC in the failing frame.
– PCC, AC module or SPCN panel card in the preceding frame in the frame string.
– SPCN frame-to-frame cable.
This ends the procedure.
21.
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 PCC, AC module, or SPCN card.
c. Connect the negative lead of a multimeter to the frame ground.
d. Connect the positive lead of a multimeter to pin 2 of J16.
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.
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 power control compartment, AC module, or SPCN card (BKSPCN or
TWRCARD) from which you disconnected the SPCN cable earlier in this step.
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
, depending on the secondary
frame you are working on.
This ends the procedure.
v Yes: Exchange the SPCN frame to frame cable power control compartment, AC module, or SPCN
card in the frame from which you removed the SPCN optical adapter.
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
, depending on the secondary
frame you are working on.
This
ends the procedure.
Analyze hardware problems 49
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