Nortel Meridian 1 Hardware Replacement Manual page 192

Page 192 of 250
553-3001-520 Standard 17.00 January 2002
Replacing equipment
Removing equipment
1 Remove the rear grill on the column pedestal. Set the main circuit
breaker to OFF (down).
CAUTION
Service Interruption
Shutting off the main circuit breaker disables the
entire column.
2 Remove the I/O safety panel over the backplane.
3 Tag and disconnect the power plugs to the MPDU.
4 Remove the metal plate covering the MPDU in the front of the module
by removing the mounting screw in each corner.
5 Unhook the locking devices on the power supply next to the MPDU.
Pull the power supply out of the card cage.
6 Remove the mounting screws for the MPDU; the screw-heads are in
the wall of the power supply slot (see Figure 31 on page 192). (Be
careful—do not let the screws fall into the module below.) Lift the unit
out of the module.
Figure 31
Mounting screws for the MPDU
MPDU
wall inside
power supply
slot
back plane
MPDU
mounting screws
card cage
553-5890