363-206-305 Trouble Clearing:
Issue 3, June 2000 Page 1 of 2
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
TAP-108
Clear DT Failure Alarm
Summary:
This procedure tells how to clear an DT failure alarm. As a stimulus to perform this
procedure, you have retrieved a DT failure alarm message from the CIT port in the
SLC-
2000 host and observed a FAIL LED indication on the DSXBIU at the NBS site.
You could also have been directed to go to the NBS site by the surveillance center. If
both the FAIL and NE lamps are on, we have facility problems. If the FAIL lamp only
is on, we have a bad board. This alarm will more than likely indicate a fault in other
system facilities. However, if you go to the NBS, use the following procedure as a
guide.
1. Open the electronics compartment door using the 216-type tool or screwdriver.
2. Connect your ESD wrist strap to the ESD GRD ground jack located at the
lower left front of the electronics compartment.
3. Check the LEDs on the DSXBIU and the other NBS circuit packs. Change
faulty circuit pack.
4. When the trouble is cleared, remove your wrist strap, secure the electronics
compartment.
5. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
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