RT Turn Up: DLP-509
363-205-401
Page 2 of 4
Issue 7, March 1997
9.
Use SD-7C117-01 or SD-7C117-02 to check wiring. Repeat procedure from
Step 2 after locating and correcting trouble.
10. Condition DMM to measure volts DC.
11. On PCU faceplate, connect DMM test leads to GND jack and
−
48 jack.
12. Does DMM indicate between
−
42 and
−
56 volts?
If YES, then proceed to Step 26.
If NO, then continue with Step 13.
13. Verify that wiring from power shelf to PCU in AB shelf is present and con-
nected properly.
14. Is wiring present and connected properly?
If YES, then proceed to Step 16.
If NO, then continue with Step 15.
15. Resolve problems through local procedures. Repeat procedure from Step 2
after locating and correcting trouble.
16. Is system being equipped with FTTH (Fiber-To-The-Home) feature?
If YES, then continue with Step 17.
If NO, then proceed to Step 20.
17. At BFU3 or BFU4 in optics power shelf, is fuse
−
48 WHITE,
−
48 BLUE, or
−
48
CMN blown?
If YES, then continue with Step 18.
If NO, then proceed to Step 20.
18. Replace blown fuse(s).
19. Does fuse(s) blown again?
If YES, then continue with Step 25.
If NO, then proceed to Step 11.
20. Replace PCU.
21. Is FAIL indicator on PCU off?
If YES, then continue with Step 22.
If NO, then proceed to Step 6.
22. On PCU faceplate, connect DMM test leads to GND jack and
−
48 jack.
