Nortel Passport 15000 Hardware Installation And Maintenance page 708

708 Chapter 17 Hardware procedures
Procedure steps
241-1501-240 5.2S2
• When a door covers the rear of a NEBS 2000 frame where the PIMs are,
you must remove the door to access the PIMs, as described in "Removing
a door" (page 672).
1 At the rear of the BIP, identify the PIM to be replaced. Note the label
indicating which breaker it is part of. The breakers are listed in the figure
"Connection points of the PIM cables" (page 709).
2 Facing the front of the BIP, locate the 2 breakers controlling the feeds of
the PIM. A label on the front of the screw cover indicates which slots each
breaker feeds. From top to bottom, the 4 PIMs of a switch are:
7RU for rear upper PIM behind slot 7 of the shelf assembly
7RL for rear lower PIM behind slot 7 of the shelf assembly
15RU for rear upper PIM behind slot 15 of the shelf assembly
15RL for rear lower PIM behind slot 15 of the shelf assembly
3 Switch off the 2 breakers (pushing O in) and put tape on each to indicate
it has not been tripped. An alarm is triggered while the breaker is off.
The A and B LEDs on the PIM of a Passport 20000 both extinguish when
power to them is switched off.
4 Unfasten the captive screw or screws on the faceplate.
5 Unplug the cable by pinching the connector tabs and pulling away from
the PIM.
6 Remove the PIM by pulling it firmly and evenly away from shelf. Avoid
jerking the pull or applying lateral movement. The PIM of a
Passport 15000 has handles.
7 Put the PIM aside.