Nortel Meridian 1 Hardware Replacement Manual page 156

Page 156 of 250
Figure 12
NT7D67CB Power Distribution Unit DC
NT7D67CB
BLO CB
0
Circuit
breakers
553-3001-520 Standard 17.00 January 2002
Replacing equipment
4 Unseat the blower unit in the front of the pedestal:
a. Remove the grill on the front of the pedestal. Set the toggle switch
on the front of the unit to OFF (left).
b. Turn the screws on the front of the unit counterclockwise and pull
it forward several inches (you will see the L-bracket on the rear of
the unit) until the connector disengages from the rear of the PDU.
DANGER
Do not pull the blower unit out of the pedestal. The
unit is heavy and the blades on the blower may still
be rotating up to two minutes after the power is
turned off.
System monitor/power supply assembly
J3 J5 J6
CB
1
Filter / Power distribution unit assembly
J4
Safety cover—the
field terminal block
is behind the cover
NT7D10CA
FLTR / PWR DIST
UNIT ASSY
CB CB
2 3
Circuit
breakers
553-5488