ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
AG-320BO-MME-OOO
4-2. GENERATOR ELECTRONIC CONTROL
(13) Any discrepancy noted during the
MODULE. (cont)
above procedures indicates a failure in the GECM
f. Overload Test. (cont)
power limiting circuit. Refer to table 2-4, Malfunction
18.
NOTE
h. Enable Test.
This should occur between 58.8 and
22.3 millivolts. If it is below 22.3, then
(1) Perform test setup procedure
there is a failure in the circuit.
(paragraph 4-2a).
(5) Any discrepancy noted during the
(2) Set power supply No. 2 voltage at
above procedure indicates a failure in the GECM
28 (± 0.5) Vdc.
overload circuit. Refer to table 2-4, Malfunction 14.
(3) Set power supply No. 4 to 0 volts.
g. Power Limit Test.
(4) Turn VOLTS ADJUST knob to
(1) Perform ten setup procedure
center/mid-range position.
(paragraph 4-2a). Leave SOURCE switch in BATT
(5) Move METER SELECT switch to
position.
FIELD VOLTS.
(2) Place METER SELECT switch in
(6) Move ENABLE switch to OFF
FIELD VOLTS position.
position. Voltmeter should indicate less than 1 Vdc.
(3) Set SOURCE switch at GEN.
(7) Move ENABLE switch to ON
position. Voltmeter should indicate 29 (± 0.5) Vdc.
(4) Adjust power supply No. 2 to 28
(±0.5) Vdc and power supply No. 4 to 1 millivolt.
(8) Any discrepancy noted during the
above procedure indicates a failure in the GECM
(5) Adjust VOLTS ADJUST knob until
enabling circuit. Refer to table 2-4, Malfunction 16.
voltmeter shows 29 (± 0.5) Vdc.
i. Regulator Test.
(6) Increase voltage from power
(1) Adjust test fixture switches and
supply No. 4 to 22.5 (± 0.2) millivolts.
knobs as follows:
(7) Decrease voltage from power SWITCH
supply No. 2 until voltmeter read 29 (± 0.5) Vdc. The
SWITCH SETTING
output of power supply No. 2 should be 24.5 (± 0.5)
METER SELECT
FIELD VOLTS
Vdc.
ENABLE
OFF
(8) Increase voltage from power
OVER TEMP
ON
supply No. 4 to 50 (± 0.2) millivolts.
SOURCE
BATT
(9) Decrease voltage from power
RTD
2
supply No. 2 until voltmeter reads 17 (± 1.5) Vdc.
FIELD
OFF
The output voltage of power supply No. 2 should be
11 (± 0.5) Vdc.
VOLTS ADJUST
FULL COUNTER-
CLOCKWISE
(10) Decrease voltage from power
(2) Adjust power supply No. 1 to 24
supply No. 4 to 1 millivolt. UNDER VOLTS light
(±4) Vdc.
should come on.
(3) Adjust power supply No. 2 to 0 Vdc.
(11 ) Increase voltage from power
supply No. 2 until UNDER VOLTS light goes off.
(4) Adjust power supply No. 3 to 5
Slowly decrease voltage of power supply No. 2 just
(±0.5) Vdc.
until UNDER VOLTS light comes on.
(5) Adjust power supply No. 4 to 0 Vdc.
(12) Increase voltage from power
(6) UNDER VOLTS light should be on
supply No. 4 until UNDER VOLTS light goes off. The
output voltage of power supply No. 4 should be
and all others off.
greater than 17.5 millivolts.
(7) Move ENABLE switch to ON.
4-5
