Nortel DMS-100 Series Maintenance Manual page 310

7-74 Alarm clearing procedures
Ext MSP
major
(continued)
77
78
79
80
81
82
297-8211-550 Standard 05.01 August 1999
Set the circuit breaker to ON.
If the circuit breaker
goes OFF, and the CONVERTER
FAIL LED is lit
remains ON, and the CONVERTER
FAIL LED is not lit
remains ON, and the CONVERTER
FAIL LED is lit
Check the backplane of the shelf for bent or short-circuited pins.
If the pins
are bent or short-circuited
are not bent or short-circuited
Insert the NT6X51 and the NT6X52 cards in the shelf.
To replace the alarm card, use the correct procedure in Card Replacement
Procedures . When you complete the procedure, return to this point.
Check the frame FAIL lamp on the MSP.
If the frame FAIL lamp
is lit and you did not complete steps
2, 3, or 4, in this procedure
is lit and you completed steps 2, 3,
and 4, in this procedure
is not lit
Go to the step you did not complete (step 2, 3, or 4) in this procedure.
Do
step 78
step 81
step 80
Do
step 84
step 79
Do
step 82
step 84
step 83