Replacing equipment Page 35 of 250Hardware Replacement13 From the front of the module, carefully slide the MMDU the remainderof the way into its slot.14 Use a slotted or Phillips screwdriver to secure the screws on the topand bottom center of the MMDU.15 Replace the card cage:a. Check that the power harness at the right rear corner of the cardcage is attached card cageb. Slide the CP PII card cage halfway into the module.16 Reconnect the card cage cables.Hold the card cage firmly and make the following connections at therear of the module.a. In AC powered systems, connect the remaining module powerconnectors to J2 on the MPDU.In DC powered systems, connect the module power connectors toeach other.b. Attach the system monitor ribbon cables:• Connect the ribbon cable that goes down to the pedestal toconnector J1 on the backplane.• Connect the ribbon cable that goes up the column to J2 on thebackplane.c. Attach the green ground wire to the frame ground bolt on themodule. Use a 11/32” socket wrench to attach the wire. Removethe nut and the lock washer at the top of the bolt. Put the frameground wire terminal over the bolt. Reinstall the top lock washerand the nut, then tighten down the nut.d. Attach the orange logic return wire. Remove one nut and the lockwasher from the LRTN blot at the rear of the card cage. Put thewire terminal over the bolt, reinstall the lock washer and nut, thentighten down the nut. Use a 1/4” or 2/8” socket wrench.17 Slide the card cage all the way into the module.18 Check the position of the EMI shield. If the EMI shield has shifted,reposition it. Remove the tape holding the EMI shield.19 Pre-route cables NT4N88AA, NT4N88BA and NT4N90AA before yousecure the card cage.
