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 proble m lies. The alarms are a good
indication of why the system went d own. They should be used along with
the following two methods.
2. Observe red LEDs on the circuit p ack to determine where software or
processor firmware (LMM) had a problem.
3. Use the reset command:
Observe all the diagnost ics on the screen, and note if th e LMM has a
problem with any of the diag nostics, as this information should give a
good indic ation of where the problem lies.
The pr oced ure t o ge t a sys tem o ut of SPE- Down mode foll ows.
NOTE:
This is important! If you cannot comple te the first step or have problems
with the maintenance interface, then th e first step should be to rep lace the
Processor circuit pac k.
1. Determine which circ uit pack is defec tive by displaying alarms and
observing the red LEDs (as disc ussed previously).
The following general purp ose maintenance proced ures may be used with other
repair strategies to clear sys tem-alarmed and user-repor ted troubles.
Reseating/Replacing Circuit Packs
!WARNING:

It is NOT recommended that you reseat c ircuit packs unless the

documentation spec ifically instructs you to d o so. If it is required to reseat a

circuit pack, follow the instructions below whic h explain how to unseat,

reseat, and replace circuit p acks.

The procedures for unseating, reseating , and replacing control circuit p acks vary
depending on the system configuration. Therefore, before performing these
maintenance activities, refer to the ap propriate proc edure 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 up ward to unlock the locking lever.