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.