363-205-401 Conversions: DLP-504
Issue 7, March 1997 Page 3 of 4
19. Does
FAIL
indicator on
DTU-R
light momentarily?
If
YES,
then proceed to Step
24.
If
NO,
then continue with Step
20.
20. Replace
CFU
in blue bank.
21. While observing
FAIL
indicator on
DTU-R
faceplate, unseat then reseat
DTU-R
.
22. Does
FAIL
indicator on
DTU-R
light momentarily?
If
YES,
then proceed to Step
24.
If
NO,
then continue with Step
23.
23. Check wiring between
PCU
in facility shelf and
CFU
in blue bank and
between
CFU
and
DTU-R/DTU-L
using SD-7C117-01 or SD-7C117-02.
Repeat procedure from Step
9
after locating and correcting trouble.
24. Is
BUSY
indicator on
DTU-R
lighted?
If
YES,
then continue with Step
25.
If
NO,
then
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
25. Replace both
DTU-L
and
DTU-R
.
26. Is
BUSY
indicator on
DTU-R
lighted?
If
YES,
then continue with Step
27.
If
NO,
then
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
27.
!
CAUTION:
Incorrectly set ADU option switches may result in immediate or future
loss of service or may introduce errors into the digital bitstream.
Replace
ADU
with another correctly optioned
ADU
.
28. Wait 20 seconds then replace
DTU-L
and
DTU-R
with units removed previ-
ously.
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