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 2–52 2–24. BACKPLANE MAINTENANCE INSTRUCTIONS CONTINUED a. REMOVAL CONTINUED 13. Disconnect cable connector (12) at J14 by spreading blue tabs and pulling connector from backplane (13). 14. Remove backplane (13) by removing 36 screws (14), 36 lockwashers (15), and 36 flat washers (16). Discard lockwashers. b. INSTALLATION CAUTION ESD SENSITIVE The ACU contains ESD sensitive components. Wear a protective ESD wrist strap whenever handling components. Failure to comply may result in damage to equipment. 1. Attach ESD grounding strap to wrist and ground to ensure ESD protection. 2. Install backplane (13) by inserting 36 screws (14), 36 new lockwashers (15), and 36 flat washers (16). 3. Position cable connector (12) on backplane (13) at J14 and push connector down until you hear tabs click into place. 4. Install Power Supply Assembly in accordance with procedure outlined in paragraph 2–19. 5. Position cable connectors (8, 9, and 10) on backplane at J15, J16, and J17, respectively, and tighten two captive screws (11) on each connector. 6. Install CPU CCA in accordance with procedure outlined in paragraph 2–18. 7. Install TCIM CCA in accordance with procedure outlined in paragraph 2–17. 8. Install Discrete I/O and Servo CCAs in accordance with procedure outlined in paragraph 2–16. 9. Install 1553 CCA in accordance with procedure outlined in paragraph 2–15. 12 11 11 10 9 8 14 15 16 13