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363-205-401
Power Up:
Issue 7, March 1997
Page 1 of 10
DLP-507
Perform Battery Charger Test
SUMMARY: Unseat all BATTERY CHARGERs. Reseat a BATTERY CHARGER.
Verify that BAT DISCHG indicator goes off and remains off, HIGH RATE CHG/ON
indicator lights, and OPEN BAT indicator is off. Unseat BATTERY CHARGER and
repeat for additional BATTERY CHARGERs. Reseat all BATTERY CHARGERs.
Remove AC power from system. Measure
−
42 to
−
56 V DC at LDU (
−
48L/GND).
Restore AC power. Remove either +BAT or
−
BAT fuse on battery shelf. Verify that
OPEN BAT indicator lights and HIGH RATE CHG/ON indicator is off. Replace +BAT
or
−
BAT fuse. Verify that OPEN BAT indicator goes off. Repeat for other battery
strings. Press HIGH RATE CHG/ACTIVATE button on BATTERY CHARGER and
verify that BAT DISCHG indicator goes off and HIGH RATE CHG/ON indicator lights.
Repeat for other BATTERY CHARGERs. Verify that HIGH RATE CHG/ON
indicator(s) goes off within 24 hours.
1.
NOTE:
Throughout this procedure the BAT DISCHG and the HIGH RATE
CHG/ON indicators on BATTERY CHARGER will light at steps indicated.
The amount of time these indicators are lighted is a function of charge
state of batteries. However, these indicators should at least light
momentarily at appropriate steps.
Verify that all 336A RECTIFIERs are seated and all BATTERY CHARGERs
are unseated. Reseat one of the BATTERY CHARGERs while observing indi-
cators on BATTERY 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.