DLP-502
: Detailed Level Procedures 363-206-305
Page 2 of 4 Issue 3, June 2000
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
6. Ensure that fuses are installed in fuse holder on faceplate (Figure 2).
7. Install unit in
PCU
slot.
8. Is
FAIL
indicator lit on
PCU
?
9.
!
CAUTION:
Before removing the
PCU
from the narrowband shelf, unlatch the unit and
wait 1 minute for capacitors to discharge.
Replace
PCU
.
10. Is
FAIL
indicator lit?
11. Contact the responsible installation group to locate and repair wiring troubles.
12. Measure voltage at test points −
48VDC
and −
48VDC RETURN
(Figure 2).
Requirement: −42 V to −60 V DC.
13. Were
PCU
voltage requirements met?
14. If you are not continuing with the turn up procedure, disconnect your wrist
strap, secure the electronics compartment door.
15.
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If
YES
, continue with
Step
9
.
If
NO
, proceed to
Step
12
.
If
YES
, continue with
Step
11
.
If
NO
, proceed to
Step
12
.
If
YES
, continue with
Step
14
.
If
NO
, repeat this procedure from
Step 9
.
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