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|  MIL-P-45969B (AR)
(z) Remove the rear housing assembly by loosening the
fasteners and lifting or sliding the entire assembly
off the remainder of the power supply cabinet.
(3) Remove the DC power supply assembly cover.
(4) On the DC power supply regulator assembly, preset
resistor (R1) to 20 ohms minimum.
(5) Set variable resistor (R4) at mid position.
(6) Set variable resistor (R16) at maximum resistance.
(7) Reconnect AC power supply cable to a 220/240 volt
AC, 3 phase, 50/60 HZ, 7.5 KVA power source.
b.
DC power supply.
(1) Output voltage adjustment.
(a) When the MASTER switch is in the ON position, the
green indicator shall light.
(b) Place bolt meter SELECTOR switch on the
distribution box to the 28 volt buss position.
(c) When the SELECTOR switch on the power supply
control panel Is in the DC POWER SUPPLY position,
the voltmeter on distribution box shall indicate
the power supply output voltage.
(d) Rotate the DC voltage adjust rheostat to the
maximum clockwise position. (Index line on knob
lines up with battery charger mark on control
panel). The voltmeter on the distribution box
shall indicate a minimum of 30 volts DC.
NOTE: If voltage indication is incorrect, readjust variable resistor
(R4) and lock adjustment.
(e) Rotate DC voltage adjust rheostat fully counter-
clockwise. The voltmeter on the distribution box
shall indicate a maximum of 26 volts DC.
NOTE: If voltage reading is not correct, readjust variable resistor
(R4). Continue this process between the high and low output voltage
until the required voltage range of 26 - 30 is obtained.
(2) Voltage regulator adjustment.
(a) Prepare a 40 ampere resistive load to be
connected between pins H and K on connector J102.
(b) With input voltage set to 220 volts AC, readjust
the DC voltage adjust rheostat to an output of 30
volts DC.
(c) Apply the 40 ampere load to connector J102 and
check the regulation at no load to full load.
Regulation shall be
1 percent or better at the
power supply, TBI-3(+) and TBI-4(-), as indicated
by a test voltmeter.
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