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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-39Reseating/Replacing Circuit Packs
1
1. Use
display alarms
command:
Issuing the
display alarms
command at the administration terminal shows
where maintenance thinks the problem lies. The alarms are a good
indication of why the system went down. They should be used along with
the following two methods.
2. Observe red LEDs on the circuit pack to determine where software or
processor firmware (LMM) had a problem.
3. Use the
reset
command:
Observe all the diagnostics on the screen, and note if the LMM has a
problem with any of the diagnostics, as this information should give a
good indication of where the problem lies.
The procedure to get a system out of SPE-Down mode follows.
NOTE:
This is important!
If you cannot complete the first step or have problems
with the maintenance interface, then the first step should be to replace the
Processor circuit pack.
1. Determine which circuit pack is defective by displaying alarms and
observing the red LEDs (as discussed previously).
The following general purpose maintenance procedures may be used with other
repair strategies to clear system-alarmed and user-reported troubles.
Reseating/Replacing Circuit Packs
!
WARNING:
It is NOT recommended that you reseat circuit packs unless the
documentation specifically instructs you to do so. If it is required to reseat a
circuit pack, follow the instructions below which explain how to unseat,
reseat, and replace circuit packs.
The procedures for unseating, reseating, and replacing control circuit packs vary
depending on the system configuration. Therefore, before performing these
maintenance activities, refer to the appropriate procedure below.
Control Circuit Packs
To unseat a control circuit pack:
1. Remove power from the PPN using the procedure provided in
‘‘Removing
Power’’.
2. Slide the latch pin upward to unlock the locking lever.