Nortel DMS-100 Series Maintenance Manual page 520

12-172 Star Remote System card replacement procedures
NTTR76
in a STAR
(continued)
(Sheet 2 of 2)
Circuit breaker
label
PS11, Slot 18
Ring 1, Slot 22
Talk B
At the FSP front panel
9
297-8353-550 Standard 05.01 March 2001
Unit
number Purpose
Unit 1 NT6X53 power converter, slot 18
Unit 1 NTTR60 ringing generator, slot 22
Unit 1 Talk battery B feed to the 9 line drawers 5 - 8, 14 - 18 and
UMP packs, in unit 0/1, slot 11/13
If
you are replacing both NTTR76
cards
else do not remove the fuses
from the NTTR75 card and go to
Use a fuse puller to remove the following fuses on the FSP front panel
• one -48 V alarm and battery supply (ABS) fuse
• one -48 V LED
• two -48 V to universal maintenance packs (UMP)
• eight ringing voltage to line drawers
• 18 -48 V to line drawers
• 18 +15 V to line drawers
• 18 +5 V to line drawers
Note: Store and group the fuses by size to simplify reinstallation into
the panel.
Use the following figure to locate the fuses and breakers and their labels.
Do
step 9
step 10