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 2–26 2–18. CPU CCA MAINTENANCE INSTRUCTIONS CONTINUED a. REMOVAL CONTINUED 10. Loosen screw (20) (approximately six turns) in Loktainer of CPU CCA. NOTE Ensure that transistor, attached to CPU CCA, does not get caught on spacer assembly when removing CCA from backplane. 11. Gently loosen CPU CCA (13) from backplane connectors J1 and J2 (21). Do not remove from ACU housing. NOTE Tag five ribbon cables before removing from back of CPU CCA. 12. Remove five ribbon cables (22) from back of CPU CCA at J3, J5, J6, J7, and J9. 13. Remove mouse cable connector (23) from back of CPU CCA. 14. Remove CPU CCA (13) from ACU housing. NOTE If Single In–line Memory Module(s) (SIMM) is faulty and requires replacing, remove SIMM closest to end of CPU CCA first and follow steps 15 and 16. 15. With CPU CCA (13) resting on a flat surface, spread tabs on both ends of SIMM strip (24), tilt SIMM to a 45 angle, and pull SIMM out of CCA. 16. To replace, insert SIMM strip into position on CPU CCA (13) at a 45 degree angle, tilt up to a 90 degree angle and lock into place by ensuring that tabs on each end of SIMM snap into place. 13 20 21 22 22 23 24 13