Nt8D3403 Cpu Module Card Cage - Nortel Meridian 1 Replacement Manual

NT8D3403 CPU Module Card Cage

To replace a defective backplane in an NT8D34 CPU Module, you must
replace the card cage. Use this procedure to replace the CPU Module card
cage.
Module covers are not hinged; do not let go of the cover. Lift the cover
away from the module and set it out of your work area.
Removing equipment
1 The CPU on the backplane you are replacing must be inactive:
a If you need to switch CPUs:
LD 35
SCPU
b Set the NORM/MAINT switch to MAINT on the active CPU
interface (IF) card. (This keeps the system from switching to the
inactive CPU.)
c Set the ENB/DIS switch to DIS on the inactive interface card.
Replacing equipment
WARNING
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Hardware replacement