Nortel DMS-100 Series Maintenance Manual page 275

If a fuse
is not blown
5 Determine if the ABS wiring inside the FSP is short-circuited. Contact the
next level of support.
6 Obtain a replacement fuse with the same voltage and amperage as the blown
fuse.
7 Remove the blown fuse.
8
Insert the replacement fuse.
If the fuse
blows again
does not blow
9 Determine which fuse is blown.
Note: Fuses 01 to 05 each supply +5 V, fuses 06 to 10 each supply +15
V, and fuses 11 to 15 each supply -48 V.
If the blown fuse
is any one of 01 to 05
is any one of RA or RB
is any one of 06 to 15
10 Use the following table to determine the +15V fuse (06 through 10)
associated with the -48V fuse (11 through 15).
If -48V fuse number is
11
12
13
OPM alarm clearing procedures
OPM cabinet major
DANGER
Risk of fire
For continued protection against risk of fire, make sure to
replace the blown fuse with a fuse of the same type, rating
(color code), and vendor.
DMS-100 Family OPM Maintenance Manual XPM14 and up
Do
step 109
Do
step 112
step 105
Do
step 14
step 14
step 10
Do associate +15V fuse number
06
07
08
7-55
Ext FSP
(continued)