363-206-305 Trouble Clearing:
Issue 3, June 2000 Page 1 of 2
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
TAP-103
Clear RGU Failure Alarm
Summary:
This procedure tells how to clear an RGU failure alarm. As a stimulus to perform this
procedure, you have retrieved an DT failure alarm message from the CIT port in the
SLC
-2000 host and observed a FAIL LED indication on the RGU 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.
1. Open the electronics compartment door using the 216-type tool or screwdriver.
2. Connect your ESD wrist strap to the ESD GRD jack located at the lower left
front of the electronics compartment.
3. Verify that the FAIL LED on the RGU is lit.
The NE LED on the DSXBIU is also lit.
4. Is rightmost fuse blown on the faceplate of the PCU?
5.
!
CAUTION:
Before removing the
RGU
, unlatch the unit and wait 1 minute for
capacitors to discharge.
Remove the failed RGU.
6. Locate the RGU to be installed and inspect the unit for damage.
7. Install the replacement RGU.
If YES, replace fuse and proceed to Step 8.
If NO, continue with Step 5.
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