Lucent Technologies SLC 5 Series - Page 115

Power Up: DLP-507 363-205-401
Page 4 of 10 Issue 7, March 1997
19. Reseat another
BATTERY CHARGER
while observing indicators on
BAT-
TERY CHARGER
faceplate.
Response:
BAT DISCHG
indicator will light and remain lighted for a
period of time determined by charge state of batteries.
If
BAT DISCHG
indicator remains lighted for more than 4
minutes,
BCU PMN
(or
P/M
) and
ADU NE
indicators will also
light.
When
BAT DISCHG
indicator goes off, the
HIGH RATE
CHG/ON
indicator will light and, if
BCU PMN
(or
P/M
) and
ADU NE
indicators are lighted, they will go off after 4 min-
utes.
The
HIGH RATE CHG/ON
indicator will go off after a period
of time determined by charge state of batteries.
Repeat from Step
2.
20. Reseat all
BATTERY CHARGER
s.
21.
!
CAUTION:
Removing AC power from a working system will cause a transfer to
battery supply, bring up a CO alarm, and eventually cause a service
interruption.
Turn off circuit breaker providing AC power to system under test.
Response:
BAT DISCHG
indicators on all
BATTERY CHARGER
s are
lighted.
ALARM
indicators on all
336A RECTIFIER
s are
lighted.
22. Condition DMM to measure DC volts.
23. Connect DMM test leads to
GND
jack and −
48L
jack on
LDU
.
24. Does DMM indicate between −42 and −56 volts?
If
YES,
then proceed to Step
29.
If
NO,
then continue with Step
25.
25. Connect DMM test leads to
GND
jack and −
48B
jack on
LDU
.
26. Does DMM indicate between −42 and −56 volts?
If
YES,
then continue with Step
27.
If
NO,
then proceed to Step
28.