Nt7D10 Power Distribution Unit Dc - Nortel Meridian 1 Replacement Manual

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NT7D10 Power Distribution Unit DC

553-3001-520 Standard 16.00 April 2000
Replacing equipment
6 Tag defective equipment with a description of the problem and package
it for return to a repair center.
Note: Repeat the process for the replacement of the second CP card (if
applicable) by moving the terminal cable to the J25 port on the I/O panel
of the other Core or Core/Network Module and continuing the procedure
starting at step 2 of the "Removing equipment" section.
7 Synchronize the hard disks on both CMDUs or IOP/CMDUs:
LD 137
SYNC
Synchronization may take as long as 40 minutes. Progress reports appear
on the TTY periodically.
Use this procedure to replace the power distribution unit (PDU) for
DC-powered systems.
Module covers are not hinged; do not let go of the cover. Lift the cover
away from the module and set it out of your work area.
Removing equipment
1 Disconnect the DC power at the source (not at the PDU).
2 Remove the grill on the rear of the pedestal.
3 Set all five circuit breakers on the PDU to OFF (down). Figure 11 shows
the location of the PDU in the rear of the pedestal.
4 Unseat the blower unit in the front of the pedestal:
— Remove the grill on the front of the pedestal. Set the toggle switch
on the front of the unit to OFF (left).
synchronizes the CPUs
WARNING