ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
TABLE 2-6. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 6.
Check for breaks or loose connections in charging circuit.
If breaks or loose connections are found, repair charging circuit, refer to Electrical
Schematic FO-1.
20. BATTERY CHARGE AMMETER SHOWS EXCESSIVE CHARGINGING 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 9-2815-255-24.
a.
If alternator is not defective, do step 4.
b. If defective, replace alternator in accordance with TM 9-2815-255-24.
Step 4.
Check for short in charging circuit.
If shorted, repair charging circuit, refer to Electrical Schematic FO-1.
21.
AC VOLTMETER (VOLTS AC) INDICATE CORRECT 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 trouble persists, notify next higher level of
maintenance.
22.
AC VOLTMETER (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.
2-24
