Nortel Meridian 1 Hardware Replacement Manual page 27

3 Disconnect all the fibre-optic patchcords and the SDI/System Monitor
cable from the card faceplate.
4 Unlatch the card's locking devices by squeezing the tabs and pulling
the upper locking device away from the card and pressing the lower
locking device downward.
5 Pull the card out of the network module and place it into an antistatic
bag away from the work area.
6 Check the replacement card and make sure that the Electro-optical
packlets are already installed. If not installed, install the new packlets
or remove the packlets from the faulty Fibre Superloop Network card
and install them on the replacement card if you are sure that the
packlets are not faulty.
7 Set the replacement card ENB/DIS switch to DIS.
8 Hold the replacement card by the card locking devices and insert it
partially into the card guides in the module.
9 Pull the upper locking device away from the faceplate on the card and
press the lower locking device downward and insert the card firmly into
the backplane connector. Press the upper locking device firmly against
the faceplate and press the lower locking device upwards to latch the
card inside the module.
10 Set the ENB/DIS switch on the Fibre Superloop Network card to ENB.
The Fibre Superloop Network card automatically starts the self-test.
11 Observe the red LED on the front panel during self-test. If it flashes
three times and stays on, it has passed the test; go on to step 13. If it
does not flash three times and then stays on, it has failed the test. Pull
the card partially out of the module and reinsert it firmly into the
module. If the problem persists, troubleshoot or replace the Fibre
Superloop Network card.
12 Connect the SDI/System Monitor cable and the fibre-optic patchcords
to the faceplate connectors of the replacement Fibre Superloop
Network card.
13 Enable the Fibre Superloop Network card by logging in to the system
terminal, loading the Network and Peripheral Equipment Diagnostic
Program LD 32, and executing ENLL loop, where loop is the actual
loop number of the Fibre Superloop Network card.
14 Tag the defective card(s) with a description of the problem and prepare
them for shipment to your equipment supplier's repair depot.
Replacing equipment
Hardware Replacement
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