ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3444-12
MARINE CORPS TM 09244A/09245A-24/2
TABLE 2-6. UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
20. BATTERY CHARGE AMMETER SHOWS EXCESSIVE CHARGING AFTER PROLONGED OPERATION.
Step 1. Test for defective batteries, paragraph 2-12.1.
a. If batteries are not defective, do Step 2.
b. If defective, replace batteries, paragraph 2-12.
Step 2. Test for defective BATTERY CHARGE ammeter, paragraph 2-27.2.
a. If BATTERY CHARGE ammeter is not defective, do Step 3.
b. If defective, replace BATTERY CHARGE ammeter, paragraph 2-27.
Step 3. Test for defective alternator, refer to TM 9-2815-256-24.
a. If alternator is not defective, do Step 4.
b. If defective, replace alternator in accordance with TM 9-2815-256-24,
Step 4. Check for short in charging circuit.
If shorted, repair charging circuit, refer to Electrical Schematic FO-1.
21. AC VOLTMETER (VOLTS AC) DOES NOT INDICATE VOLTAGE.
Step 1. Test for defective AC Voltmeter (VOLTS AC), paragraph 2-31.2.
a. If AC Voltmeter (VOLTS AC) is not defective, do Step 2.
b. If defective, replace AC Voltmeter (VOLTS AC), paragraph 2-31.
Step 2. Test for defective VOLTAGE adjust potentiometer, paragraph 2-34.3.
a. If VOLTAGE adjust potentiometer is not defective, do Step 3.
b. If defective, replace VOLTAGE adjust potentiometer, paragraph 2-34.
Step 3. Test for defective AM-VM transfer switch, paragraph 2-39.3.
a. If defective, replace AM-VM transfer switch, paragraph 2-39.
b. If AM-VM transfer switch is not defective and problem persists, notify next higher level of mainten-
ance.
22. AC METER(VOLTS AC) INDICATES VOLTAGE, BUT FREQUENCY METER (HERTZ) IS OFF SCALE.
Step 1. Test for defective frequency transducer, paragraph 2-52.2.
a. If frequency transducer is not defective, do Step 2.
b. If defective, replace frequency transducer, paragraph 2-52.
Step 2. Test for defective FREQUENCY meter (HERTZ), paragraph 2-28.2.
a. If defective, replace FREQUENCY meter (HERTZ), paragraph 2-28.
b. If FREQUENCY meter (HERTZ) is not defective and trouble persists, notify next higher level of
maintenance.
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