Nortel Meridian 1 Manual page 814

12-50 Upgrades to Meridian 1 option 81
553-3001-250 Standard 14.00 August 1996
7 Remove the I/O safety panel that covers the rear of the backplane.
Note: Perform the next step only if the module is not already equipped
with universal I/O panels (P0745716). Otherwise, skip the step.
8 Label and disconnect cables from the I/O panels. Remove both I/O
panels. Keep the screws for reuse. Remove the I/O safety panel that
covers the rear of the backplane.
9 Remove the two mounting screws that secure the rear of the card cage to
the module. Keep the screws for reuse. (A 1/4" socket wrench is needed
for this operation.)
10 Remove the three mounting screws that secure the front of the card cage
to the bottom of the module. Keep the screws for reuse. Pull the card cage
forward until it is half-way out of the module.
11 Remove the logic ground (orange) wire from the backplane bolt. Be
careful; do not drop the nut or lockwasher into the pedestal (see
Figure 12-9).
Do not disconnect the main power connectors (large orange
connectors) at the top and bottom of the module.
WARNING