Section III. TROUBLESHOOTING

TM 9-4910-663-34 2-4. EQUIPMENT CHECKOUT a. Check the zero setting of all front panel meters, per paragraph 2.3.c of TM 9-4910-663-12. b. Turn on the external power source, set the main circuit breaker switch in the high voltage compartment to the on position (CB1, fig 2-8), and check to see that the test stand operates. A reversing switch is provided in the drive motor circuit for reversing drive motor rotation as necessary. With an input A-B-C phase sequence, setting the reversing switch to the down position will cause clockwise rotation of the output shafts as viewed facing the output shafts. Section II. PRE-EMBARKATION INSPECTION OF MATERIAL IN UNITS ALERTED FOR OVERSEAS MOVEMENT 2-5. Not applicable. Section III. TROUBLESHOOTING 2-6. INTRODUCTION a. This section contains troubleshooting information for locating and correcting most of the operating troubles which may develop in the test stand. Each malfunction for an individual section of the test stand is followed by a list of tests or inspections which will help you to determine the corrective actions for you to take. You should perform the tests/inspections and corrective actions in the order listed. b. This manual cannot list all possible malfunctions that may occur, nor all tests or inspections and corrective actions. If a malfunction is not listed (except when the malfunction and cause are obvious) or is not corrected by listed corrective actions, notify your supervisor. 2-7. PRELIMINARY CONTROL SETTINGS. Before proceeding with troubleshooting, set the operating controls of the test stand to the positions listed in table 2-2. 2-8. USE OF TROUBLESHOOTING TABLE a. Troubleshooting information is contained in table 2-5. To minimize unnecessary repetition of information in the table, troubleshooting information is arranged in a logical sequence. For any malfunction listed in the table, the tests and corrective actions listed are based on the assumption that none of the preceding malfunctions exists; therefore, make sure that none of the preceding malfunctions listed in the table are present. For direct reference to troubleshooting procedures by subject, the following alphabetical list is provided: Change 1 2-7