Nortel DMS-100 Series Maintenance Manual page 709

Refer to the previous figure for the location of the heating elements on the
backplane of the electrical compartment. The heaters must be warm.
If the heating elements
warm
do not warm
3 Contact the next level of maintenance.
4 The procedure is complete.
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Routine maintenance procedures 13-61
OPAC
Do
step 4
step 3
Heaters test Heaters test
OPAC
(continued) (end)