Standard 16.00 April - Nortel Meridian 1 Replacement Manual

Page 156 of 362

553-3001-520 Standard 16.00 April 2000

Replacing equipment
5 Disconnect cables that run between the module above the pedestal
(module 0) and the PDU:
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 module 0.
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.
6 Tag and disconnect cables to the NT8D22 System Monitor faceplate.
7 Loosen the five screws that secure the NT7D10CA system monitor
assembly. Pull the assembly out of the pedestal far enough to disconnect
the cables to the PDU:
a Disconnect the small orange connectors (J2 on the PDU, P2 on the
system monitor assembly) on the left side of the PDU.
b Disconnect the flat white connector to the small circuit board (P1 on
the PDU, J1 on the system monitor assembly) on the right side of the
PDU.
8 Pull the system monitor assembly out of the pedestal along with the
attached ribbon cable and set it aside until the replacement PDU is
installed.
9 Remove the plastic safety cover over the terminal block on the PDU:
a Loosen the three screws holding the cover.
b Lift the cover up, then over the three mounting screws on the front
panel of the cover.
10 Tag and disconnect all wiring to the field wiring terminal block on the
PDU (see Figure 15).
Label wires carefully. Improper wiring can cause system damage.
CAUTION