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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 CHARGERs.
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 CHARGERs are
lighted. ALARM indicators on all 336A RECTIFIERs 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.