TM 11-6660-266-13
k. Disconnect primary AC power from AC IN connector J1.
l . Connect primary DC power to DC IN connector J2 as follows:
Pin A - 24 VDC, 2 ampere minimum
Pin B - DC Return
m. Set DC PWR circuit breaker to ON and observe that DC INPUT POWER LED illuminates.
n. Set PROCESSOR power select switch to DC ON and observe that PROCESSOR LED illuminates.
o. Using Digital Multimeter, check for presence of 24 VDC at DC connector J5, pins A (+) and B (-).
NOTE
Actual measured voltage should be the same as Input voltage.
p. Using Digital Multimeter, check for 8.5 0.5 VDC at DCT connector J3, pins A (+) and B (-).
q. This completes testing. Set all switches to off positions and disconnect primary power.
4-7-2. 24 VDC Power Supply. Testing of the 24 VDC Power Supply can be accomplished with the use of a
Model 8840A/AF-05 Digital Multimeter (or equivalent) and 120 VAC, 60 Hz power source.
To test the 24 VDC Power Supply, proceed as follows:
TO PREVENT INJURY TO PERSONNEL, ENSURE POWER TO THE
24 VDC POWER SUPPLY IS DISCONNECTED PRIOR TO TEST
SETUP.
a. Ensure primary power input is disconnected.
b. Set AC PWR circuit breaker to tripped (off) position.
c. Connect 24 ohm (approximate) bad with minimum power rating of 30 watts to DC OUT connector J2 as
follows:
Pins A and B to one side of bad
Pins C and D to other side of bad
d. Connect primary AC power to AC IN connector J1 as follows:
PinA-120VAC,60Hz
Pin B - AC Return
Pin C - Safety ground
e. Connect Digital Voltmeter across load with the positive lead connected to junction of bad and pins A and B.
f. Set AC PWR circuit breaker to ON and observe that AC IN and DC OUT LEDs both illuminate.
4-7
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