Avaya Definity SI, Руководство по обслуживанию, Страница: 229 / 2968

Repair Procedures for High and Critical Reliability
Issue 4 May 2002 6-25 555-233-123
Circuit Pack Replacement Procedure
NOTE:
If you are replacing the Processor Circuit Pack, obtain a new license file.
NOTE:
This procedure does not apply to the TN768 Tone-Clock circuit pack.
Please refer to “TONE-BD”, “TONE-PT”, or “TDM-CLK” in
Chapter 10,
‘‘Maintenance Object Repair Procedures’’ for the procedure to replace the
Tone-Clock circuit pack.
NOTE:
See the flowchart of the procedure for installing or replacing Standby SPE
Circuit Packs In Duplication Option Systems at the end of this section, for
use as a circuit pack replacement maintenance aid.
The following procedure involves throwing the SPE Select Switches to hard-select
the current Active SPE. After completing the circuit pack replacement procedure,
verify that the SPE Select Switches have been returned to the AUTO position both
by noting their position and by noting that the SPE Select Switch LEDs on the
TN772 Duplication Interface circuit packs are not on.
1. Throw the SPE Select Switches, one at a time, to force selection of the
current Active SPE. If SPE B is currently the Active SPE, throw both SPE
Select Switches, one at a time, to the SPE A position. If SPE A is currently
the Active SPE, throw both SPE Select Switches, one at a time, to the
SPE B position. Throwing the SPE Select Switches automatically disables
shadowing.
NOTE:
Do not remove power before proceeding with Step 2. All PPN Control
Carriers used in High or Critical Reliability Systems (A slot for the
Duplication Interface circuit pack identifies these carriers.) have
staggered pins to support the hot plug-in of circuit packs.
2. Unseat the Standby SPE Processor circuit pack. (It is not necessary to
entirely remove the Standby SPE Processor circuit pack from its slot.)
3. If the circuit pack to be replaced is the TN772 Duplication Interface in the A
carrier, continue with this step. Otherwise, proceed to Step 4.
Issue the status system command from the terminal, and check the status
of the Tone-Clock in the 1B carrier:
a. If the SERVICE STATE field indicates that the 1B carrier Tone-Clock
is “in” (that is, in service) and the SYSTEM CLOCK and SYSTEM
TONES fields indicate that it is “active,” proceed to Step 4.