Nortel DMS-100 Series Maintenance Manual page 267

At the OPAC cabinet
15 Trip the circuit breaker CB2 or CB4 to remove the talk battery filter out of the
circuit. This procedure prevents the cartridge fuse from blowing.
If affected unit is
Unit 0
Unit 1
At the PDC frame
16 Replace the cartridge fuse inside the fuse holder.
17
DANGER
Risk of fire
To prevent risk of fire, replace the blown fuse with a
fuse of the same type, rating (color code), and
manufacturer.
Replace the blown fuse.
18 Install the fuse holder on the PDC frame again.
At the OPAC cabinet
19 Reset circuit breaker CB2 or CB4. Move the switch to the ON/OFF position and
back to the ON position in quick succession. The LED must turn OFF.
If circuit breaker
trips again
remains ON, LED goes off
20
Determine if the fuse did blow again.
If the fuse
did blow again
did not blow again
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Alarm clearing procedures 7-31
OPAC talk battery alarm
Critical
Trip circuit breaker
CB2
CB4
Do
step 20
step 57
Do
step 56
step 57
(continued)