Power Up: DLP-517
363-205-401
Page 2 of 4
Issue 7, March 1997
10. Is AC/DC ringing present at both
−
20HZ jacks on the RSU?
If YES, then proceed to Step 24.
If NO, then continue with Step 11.
11. Check wiring at bulk power shelf using SD-7C130-01. Repeat procedure from
Step 3 after locating and correcting trouble.
12. Is FAIL indicator on RING GEN1 lighted?
If YES, then continue with Step 13.
If NO, then proceed to Step 14.
13. Replace RING GEN1 and repeat the procedure from Step 3.
14. Condition DMM to measure AC volts.
15. On RING GEN1, connect DMM test leads to
−
20HZ jack and GND jack.
Response:
DMM indicates between 90 and 110 volts.
16. Condition DMM to measure DC volts.
Response:
DMM indicates between
−
50 and
−
60 volts.
17. Is AC/DC ringing present on RING GEN1?
If YES, then continue with Step 18.
If NO, then proceed to Step 19.
18. Check wiring on bulk power shelf connecting to RING GEN1 using
SD-7C130-01. Repeat procedure from Step 3 after locating and correcting
trouble.
19. Condition DMM to measure DC volts.
20. On RING GEN1, connect DMM test leads to
−
48V jack and GND jack.
21. Does DMM indicate between
−
42 and
−
56 volts?
If YES, then continue with Step 22.
If NO, then proceed to Step 23.
22. Replace RING GEN1 and repeat the procedure from Step 3.
23. Check wiring on bulk power shelf to RING GEN1 using SD-7C130-01. Repeat
procedure from Step 3 after locating and correcting trouble.
