TM-9-1200-215-34&P Technical Manual for M109 Automatic Fire Control System (AFCS) Download
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TM 9–1200–215–34&P 2–51 2–24. BACKPLANE MAINTENANCE INSTRUCTIONS CONTINUED a. REMOVAL CONTINUED CAUTION The connector panel assembly is attached by cables to internal components of ACU and cannot be moved very far from housing without putting strain on those cables. Exercise caution when removing bottom cover from ACU housing. Failure to comply may result in damage to equipment. 5. Remove ACU connector panel assembly (4) by removing 16 screws (5) and 16 flat washers (6). Lift connector panel assembly off housing (3). CAUTION The EMI shielding gasket is vital to this piece of equipment and is easily damaged. Handle with care when removing or replacing it. Failure to comply may result in damage to equipment. 6. Inspect EMI shielding gasket (7) in groove in housing (3) for cuts, nicks, or signs of stretching. Discard EMI shielding gasket if unserviceable. 7. Remove 1553 CCA in accordance with procedure outlined in paragraph 2–15. 8. Remove Discrete I/O and Servo CCAs in accordance with procedure outlined in paragraph 2–16. 9. Remove TCIM CCA in accordance with procedure outlined in paragraph 2–17. 10. Remove CPU CCA in accordance with procedure outlined in paragraph 2–18. NOTE Tag all cables before removing to aid in installation. 11. Disconnect cable connectors (8, 9, and 10) from backplane at J15, J16, and J17, respectively, by loosening two captive screws (11) on each connector. 12. Remove Power Supply Assembly in accordance with procedure outlined in paragraph 2–19. 11 8 9 10 11 4 5 6 3 7