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.
To Next Page
Loading...
