Fujitsu FLM 150 ADM Maintenance And Trouble Clearing page 152

Maintenance and Trouble Clearing
FJTU-320-515-480
4.13.2 Procedure
Step 1 If you have a known-good HC1A-STS1 unit, use it to replace the original unit, or
locate another unit and inspect if for damage, debris, and foreign objects.
Figure 4-37 shows the HC1A-STS1 unit front panel and hardware option
locations.
Set the option switches on the new unit to the same positions used on the
Step 2
removed unit.
Step 3 Insert the replacement unit by carefully sliding the HC1A unit into the
appropriate HC1A slot until the connectors meet. Make sure the extractor levers
are open. Slowly press the unit into the mounting slot. Gently close the top and
bottom extractor levers with both hands to seat the unit into the backplane. Is the
LINE LED off and the FAIL/SVCE LED green?
Complete your fault-reporting documentation.
You have completed this procedure.
Step 4 Check the incoming signal at the DSX-1/DSX-3/STS-1 bay. Is the signal present
and error-free at the DSX?
If Yes:
Go to Step 5.
Step 5 Repeat trouble analysis procedures. Refer to Section 2, Plug-In Unit Front-Panel
Devices. Is the LINE LED off and the FAIL/SVCE LED green?
If Yes:
Complete your fault-reporting documentation.
Note: The Hardware Data Record form is provided in Appendix A of the Plug-In Unit
Installation practice, FJTU-320-515-220.
You have completed this procedure.
Issue 9, May 1999
4.13: Replacing the STS-1 Electrical Channel
If Yes:
The source of the problem is not the FLM 150 ADM.
You have completed this procedure.
Call the Fujitsu Technical Assistance Center at
1-800-USE-FTAC (1-800-873-3822) for assistance.
FNC and FNC Customer Use Only
(HC1A-STS1) Unit
If No:
Go to Step 4.
If No:
If No:
Vol. ll, Page 480.4-60