365-575-102 Detailed Level Procedure: DLP-550
Issue 8.0, July 2002 Page 9 of 16
Option 2: Replace the Circuitry Unit of a Power Line Filter Assembly
!
CAUTION:
Use a static ground wrist strap whenever handling circuit packs or working on an
FT-2000 network element to prevent electrostatic discharge damage to sensitive
components.
!
CAUTION:
DO NOT remove the fuse for more than one feeder at a time or the shelf will lose
service.
1. Verify that there is a fuse/power failure alarm on the appropriate shelf and
take note of whether the alarm indicates feeder A or B.
NOTE:
In the alarm message, ls indicates low-speed shelf and hs indicates
high-speed shelf. For example, if the alarm is hs fuse/power failure A then
the filter assembly for the A feeder for the high speed shelf needs to be
replaced.
2. Remove the fuse for the affected shelf and feeder.
Reference: DLP-515, Replace Fuse in Power Distribution and Fuse
Panel or User Panel steps 2 through 4.
3.
!
CAUTION:
DO NOT replace the power line filters for Feeder A and Feeder B at the
same time, or the shelf will lose service.
Use the color coding of the power leads to locate the defective power line filter
circuitry unit for the shelf and feeder.
Reference: Figure 5 on page 11.
4. The circuitry unit is held in place by a set screw. Loosen the set screw. The set
screw is captive, so it will not fall off.
Reference: Figure 5 on page 11.
5. Once the set screw is loose, the circuitry unit is free to slide off of the two
standoffs that are mounted to the right side of the shelf. Work the circuitry unit
off of the standoffs.
6. Extract the circuitry unit until it is out where you can work with the leads.
To Next Page
Loading...
Need help?
General