Nt7D67Cb Power Distribution Unit Dc - Nortel Meridian 1 Replacement Manual

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NT7D67CB Power Distribution Unit DC

553-3001-520 Standard 16.00 April 2000
Replacing equipment
Installing equipment
1 Plug the replacement card into the vacated connector (the connector
closest to the right) on the backplane before the cables are connected.
Cables must be disconnected when the card is installed. When you
connect the cables, you must follow the order given or the system will
shut down.
2 Connect cables to the system monitor in the following order: connect the
cable to connector P1, then P2, then P3.
3 Replace the I/O safety panel.
4 Replace the rear cover on the module.
5 Tag defective equipment with a description of the problem and package
it for return to a repair center.
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 In the rear of the pedestal, set all five circuit breakers on the PDU to OFF
(down). Figure 14 shows the PDU (labeled FLTR/PWR DIST UNIT
ASSY on the equipment) and the NT7D10CA System Monitor/Power
Supply Assembly (labeled XSM/PWR SUPPLY ASSY on the
equipment).
CAUTION
WARNING