Nortel Meridian 1 Replacement Manual page 344

Page 344 of 362
553-3001-520 Standard 16.00 April 2000
Replacing an NT7D10 PDU with an NT7D67CB PDU
6 Disconnect cables to the module above the pedestal (module 0):
a Remove the rear cover on the module.
b Remove the I/O safety panel over the backplane in the module.
c Disconnect the system monitor ribbon cable from the PDU and from
the module and set it aside for reconnection with the replacement
NT7D67CB PDU.
d Disconnect the large orange power connector (J1) from the PDU.
Note: To disconnect the power plug, you must press a latch trip on the
front and rear of the plug. You may need to use a screwdriver blade
against the latch trip on the front of the plug.
7 Tag and disconnect cables to the NT8D22 System Monitor card. Loosen
the two screws on the card faceplate and remove it.
8 Remove the six screws that position the NT7D10 PDU. Carefully pull the
unit straight out and set it on the floor next to the pedestal (see Figure 38).
The PDU cannot be completely removed from the pedestal until wires
to the field wiring terminal block are disconnected. Label wires
carefully. Improper wiring can cause system damage.
9 Tag and then disconnect all wiring to the field wiring terminal block.
10 Locate the frame ground wire from the field wiring terminal block to the
frame ground bolt inside the pedestal. Disconnect this wire at the ground
bolt.
11 Remove the field wiring terminal block:
e Remove the cover over the terminal block.
f Remove the four screws that secure the terminal block and lift it out
of the pedestal.
CAUTION