RT Turn Up: DLP-502
363-205-401
Page 2 of 4
Issue 7, March 1997
7.
Use SD-7C117-01 or SD-7C117-02 to check bank wiring. Repeat procedure
from Step 3 after locating and correcting trouble.
8.
Condition DMM to measure volts DC.
9.
On PCU, connect DMM test leads to GND jack and
−
48 jack.
10. Does DMM indicate between
−
42 and
−
56 volts?
If YES, then proceed to Step 31.
If NO, then continue with Step 11.
11. Verify that wiring from power shelf to PCU in facility shelf is present and con-
nected properly.
12. Is wiring present and connected properly?
If YES, then proceed to Step 14.
If NO, then continue with Step 13.
13. Resolve problem through local procedures. Repeat procedure from Step 3
after locating and correcting trouble.
14. Is system being equipped with Fiber-To-The-Home (FTTH) feature?
If YES, then continue with Step 15.
If NO, then proceed to Step 18.
15. At BFU3 or BFU4 in optics power shelf, is fuse
−
48 WHITE,
−
48 BLUE, or
−
48
CMN blown?
If YES, then continue with Step 16.
If NO, then proceed to Step 18.
16. Replace blown fuse(s).
17. Does fuse(s) blown again?
If YES, then continue with Step 29.
If NO, then proceed to Step 8.
18. Replace PCU in facility shelf.
19. Is FAIL indicator on PCU off?
If YES, then continue with Step 20.
If NO, then proceed to Step 4.
20. On PCU, connect DMM test leads to GND jack and
−
48 jack.
