TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 3-10. GENERAL SUPPORT SYMPTOM INDEX Troubleshooting Procedure (Page) Eyepiece arm will not remain in stowed position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 Lens is damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 Lens will not focus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 Reticle is not illuminated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3-7 3-11. GENERAL SUPPORT TROUBLESHOOTING MALFUNCTION TEST OR INSPECTION LOCATION CORRECTIVE ACTION 1. LENS(1) WILL NOT FOCUS. Observe visually. Repair eyepiece and erector lens subassembly (ref. para 3-22). 2. LENS (1) IS DAMAGED. Observe visually. Repair eyepiece and erector lens subassembly (ref. para 3-22). 3. RETICLE (2) IS NOT ILLUMINATED. Observe visually. a. Replace circuit board assembly for M118A3 (ref. para 3-24). b. Repair wiring harness (ref. para 3-26). 4. EYEPIECE ARM (3) WILL NOT REMAIN IN STOWED POSITION. Operate lock-release lever. Repair ratchet (4) (ref. para 3-22). 3-7