363-205-401
RT Turn Up:
Issue 7, March 1997
Page 1 of 4
DLP-509
Install and Test Power Converter Unit (PCU)
in AB Shelf
SUMMARY: Install PCU into AB 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.
Have a CTU and/or a DTU already been installed in the dual bank assembly?
If YES, then continue with Step 3.
If NO, then proceed to Step 4.
3.
Insert PCU into AB (lower) shelf PCU slot of channel bank.
Response:
ADU MJ and NE and BCU A, B DIGROUP indicators are
lighted and PCU FAIL indicator is off. BCU C, D DIGROUP
indicators will also be lighted if CD digroups are in the preser-
vice and equipped state.
Proceed to Step 5.
4.
Insert PCU into AB (lower) shelf PCU slot of channel bank.
Response:
MN, NE, and FAIL indicators on ADU are lighted and FAIL
indicator on PCU is off.
5.
Is PCU FAIL indicator off?
If YES, then proceed to Step 10.
If NO, then continue with Step 6.
6.
Replace PCU.
7.
Does FAIL indicator on PCU light and remain lighted?
If YES, then continue with Step 8.
If NO, then proceed to Step 10.
8.
Replace PCU with PCU removed previously.
