Lucent Technologies SLC 5 Series - Page 215

363-205-401 Power Up: DLP-530
Issue 7, March 1997 Page 3 of 6
9. Inspect and/or replace the following in the order listed until the
A/FCU MJ
indi-
cator goes out:
•
WHITE
and
BLUE
fuses in
BFU1
• Each
PCU
• Optics power shelf wiring using SD-7C150-01.
10. Condition DMM to measure volts DC.
11. At one of the
PCU
s just installed, 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
21.
If
NO,
then continue with Step
13.
13. Are any fuses on
BFU1
or
BFU2
blown?
If
YES,
then continue with Step
14.
If
NO,
then proceed to Step
15.
14. Replace blown fuse(s) in
BFU
and repeat procedure from Step
11
.
15. At
TB1
on RT optics power shelf (Figure 1), use DMM to measure voltage
between −
48V1
and −
48RTN1
and between −
48V2
and −
48RTN2
.