Nortel DMS-100 Series Maintenance Manual page 249

13 Determine if the fuse is blown.
If the fuse
is blown
is not blown
14 Remove the fuse holder that contains the blown fuse.
At the OPM site
15 Trip the circuit breaker CB8 or CB9 to remove the talk battery filter from the
circuit to prevent a blown cartridge fuse.
If affected unit
is Unit 0
is Unit 1
At the PDC frame
16 Replace the cartridge fuse in the fuse holder.
17
Replace the blown fuse.
18 Install the fuse holder on the PDC frame again.
At the OPM site
19 Move the switch to the ON/OFF position and back to the ON position in quick
sequence. This action resets circuit breaker CB8 or CB9 and causes the LED
device to go off.
If circuit breaker
trips again
remains at the ON position and
the LED goes off
OPM alarm clearing procedures
DANGER
Risk of fire
For continued protection against risk of fire, replace the
blown fuse with a fuse of the same type, rating (color code),
and manufacturer.
DMS-100 Family OPM Maintenance Manual XPM14 and up
LCM talk battery alarm
critical
Do
step 14
step 57
Do Trip circuit breaker
CB8
CB9
Do
step 20
step 57
7-29
(continued)