TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
Page 25 of 344
TM 9-1240-400-34&P Section III. TROUBLESHOOTING 2-6. GENERAL. a. The symptom index can be used as a quick guide to troubleshooting. Common malfunctions are listed in alphabetical order with a page number reference to the troubleshooting table, where a test or inspection and corrective action are provided. b. The direct support troubleshooting table lists the common malfunctions which may be found during maintenance of the M115 panoramic telescope. Refer to page 29. Perform the tests/inspections and corrective actions in the order listed. c. The general support troubleshooting table lists the common malfunctions which may be found during maintenance of the M115 panoramic telescope. Refer to page 210. Perform the tests/inspections and corrective actions in the order listed. d. This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. DIRECT SUPPORT SYMPTOM INDEX Troubleshooting Procedure (Page) OPTICAL LENS Focus out of adjustment ......................................................................................................................... 2-9 Fogged or condensation present ............................................................................................................ 2-9 Table 2-2. DIRECT SUPPORT TROUBLESHOOTING MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION OPTICAL LENS 1. LENS (1) FOCUS OUT OF ADJUSTMENT. Observe visually. Focus lens. Refer to page 2-63. 2. LENS (1) FOGGED OR CONDENSATION PRESENT. Observe visually. Purge and charge tele- scope. Refer to TM 750-116. 2-9