Nortel DMS-100 Series Maintenance Manual page 288

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7-68 OPM alarm clearing procedures

OPM cabinet major

297-8361-550 Standard 04.01 September 2000

Determine if the pins on the backplane of the shelf are bent or short-circuited.

are bent or short-circuited

are not bent or short-circuited, and the converter is an

are not bent or short-circuited, and the converter is

not an NT6X53

Set the circuit breaker to OFF.

Straighten or replace bent or short-circuited pins. Go to step 96.

Insert the NT6X51 and the NT6X52cards on the shelf.

Set the circuit breaker to ON.

If the CONVERTER FAIL LED

Use the following table and diagram to identify the alarm and control card

associated with the shelf with the lit CONVERTER FAIL LED.

Shelf number

NT2X70 in slot 25 row A bay 0 shelf 05

NT2X70 in slot 22 row A bay 0 shelf 05

NT2X09 in slot 17 and 20 row A bay 1 shelf 05

NT6X53 in slot 1 row A bay 0 shelf 19 and 33

NT6X60 in slots 1 and 5 row A bay 0 shelf 05

control card

Troubleshooting