Fujitsu FLM 150 ADM Maintenance And Trouble Clearing page 138

Maintenance and Trouble Clearing
FJTU-320-515-480
4.11.2 Procedure
Step 1 Remove the front cover from the optical cable tray located on the top front of the
shelf.
Note: Each unit occupies both the Working and Protect high-speed slot for the respective
group (high-speed Group 1 or 2). When both units are in place, a pair of interconnect ribbon
cables must be disconnected between them before the unit(s) can be removed.
Step 2 Disconnect the interconnect ribbon cable between CN4 of the Group 1 unit and
CN3 of the Group 2 unit. Refer to Figures 4-27 and 4-28.
Step 3 Disconnect the interconnect ribbon cable between CN3 of the Group 1 unit and
CN4 of the Group 2 unit. Refer to Figures 4-27 and 4-28.
Step 4 Disconnect the fiber cables.
Step 5 Remove the original HC1A-6Lx1 unit(s).
Step 6 If you have a known-good unit, use it to replace the failed optical HC1A-6Lx1
unit(s), or locate another unit and inspect it for damage, debris, and foreign
objects.
Note: The HC1A-6Lx1 unit has no hardware option settings.
Reinstall the interconnect cable between CN3 of the Group 1 unit and CN4 of the
Step 7
Group 2 unit. Refer to Figures 4-27 and 4-28.
Step 8 Reinstall the interconnect cable between CN4 of the Group 1 unit and CN3 of the
Group 2 unit. Refer to Figures 4-27 and 4-28.
Reconnect the fibers and insert the new unit(s). Are the LINE and FAIL LEDs on
Step 9
the optical unit off?
Complete your fault-reporting documentation.
You have completed this procedure.
Issue 9, May 1999
If Yes:
FNC and FNC Customer Use Only
4.11: Replacing the OC-12 Optical Channel
If No:
Go to Step 10.
(HC1A-6Lx1) Units
Vol. ll, Page 480.4-46