363-205-401
RT Turn Up:
Issue 7, March 1997
Page 1 of 2
DLP-513
Install PCU Unit in CD Shelf
SUMMARY: Install PCU into CD shelf and verify that FAIL indicator is off. Measure
−
42 to
−
56 V DC at PCU faceplate.
1.
Get one PCU (AUA11, AUA11B or AUA11C) and inspect for possible dam-
age.
2.
Insert PCU into PCU slot in CD (upper) shelf of channel bank.
Response:
MJ and NE indicators on ADU and DIGROUP C, D indicators
on BCU are lighted. FAIL indicator on PCU should be off.
3.
Does FAIL indicator on PCU go off and remain off?
If YES, then proceed to Step 8.
If NO, then continue with Step 4.
4.
Replace PCU.
5.
Does FAIL indicator on PCU go off and remain off?
If YES, then proceed to Step 8.
If NO, then continue with Step 6.
6.
Replace PCU with PCU removed previously.
7.
Use SD-7C117-01 or SD-7C117-02 to check wiring. Repeat procedure from
Step 2 after locating and correcting trouble.
8.
Condition DMM to measure volts DC.
9.
On PCU faceplate, 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 20.
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.
