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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Routine Maintenance Procedures
Page 5-2Handling Control Circuit Packs
5
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.
Procedure for a Standard Reliability Cabinet
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.
3. Pull down on the locking lever until the circuit pack disconnects from its
socket.
4. Pull the circuit pack just enough to break contact with the backplane
connector, but do not remove it from the cabinet.
To reseat a circuit pack:
1. Push the unseated circuit pack back into the backplane connector.
2. Lift the locking lever until the pin engages.
3. Restore power to the PPN using the procedure provided in ‘‘
Restoring
Power’’
To replace Control circuit packs:
1. Remove power from the PPN using the procedure in the ‘‘
Removing
Power’’
1. Unseat the circuit pack.
2. Slide the circuit pack out of the slot.
3. Replace the circuit pack as per the following procedure:
NOTE:
If a new circuit pack does not correct the problem, install the original
circuit pack.
NOTE:
If you are replacing a TN790 circuit pack, refer to ‘‘TN790 Processor
Circuit Pack (Memory)’’ in this chapter.
To install a new circuit pack or return the original one to service:
1. Carefully insert the circuit pack and push it all the way into its mounting
slot.