Lucent Technologies SLC 5 Series - Page 501

363-205-401 Conversions: DLP-519
Issue 7, March 1997 Page 3 of 4
18. Replace RT channel unit and repeat this procedure from Step
5.
19. At RT, look for tip and ring reversal and repeat from Step
15.
20. At RT, lift telephone handset during ringing.
21. At RT, does ringing trip normally?
If
YES,
then proceed to Step
23.
If
NO,
then continue with Step
22.
22. Replace RT channel unit and repeat this procedure from Step
5
.
23. Is this the last designated channel to be tested?
If
YES,
then continue with Step
24.
If
NO,
then proceed to Step
3.
24. Is TBCU (test bus control unit) available for use in testing channels?
If
NO,
then proceed to Step
33.
If
YES,
then continue with Step
25.
25. Request that Repair Service Bureau or Local Test Desk perform necessary
channel tests using TBCU.
26. Did tests pass?
If
YES,
then proceed to Step
32.
If
NO,
then continue with Step
27.
27. Check test connections and correct if needed. If connections are correct,
replace RT channel unit. Repeat Step
25
and continue with Step
28.
28. Did tests pass?
If
YES,
then proceed to Step
32.
If
NO,
then continue with Step
29.
29. Make sure TBCU is working properly and that you are using proper proce-
dures. Repeat Step
25
and continue with Step
30.
30. Did tests pass?
If
YES,
then proceed to Step
32.
If
NO,
then continue with Step
31.