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 4–6 Section V . MAINTENANCE PROCEDURES. Page Page General 4–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Top Cover Assembly, Bottom Cover, and Preformed Packing 4–7 . . . . . . . . . . . . . . . . . . . . . . . . . . Top Cover Assembly , Neoprene Rubber Strip(s) 4–9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Top Cover Assembly and Bottom Cover, RFI/EMI Contact Strip 4–11 . . . . . . . . . . . . . . . . . . . . . . Circuit Card Assemblies (CCAs) A2, A3, A4, and A5 4–13 . . . . . . . . . . . . . . . . . . . . . . . . DC–DC Converter (Power Supply) (PS1) 4–15 . . . . . . Electrical Indicator Panel 4–17 . . . . . . . . . . . . . . . . . . . . Electrical Indicator Panel, LEDs DS1 and DS2 4–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spring Latch Assembly 4–22 . . . . . . . . . . . . . . . . . . . . . . Cover, Electrical Connector 4–24 . . . . . . . . . . . . . . . . . . 4–12. GENERAL a. This section contains the step–by–step maintenance procedures for DS level maintenance of the PDIU. These procedures are provided to access components for general maintenance. These maintenance tasks are authorized by the Source, Maintenance, and Recoverability (SMR) codes indicated in the RPSTL in Appendix C. There are no GS level maintenance tasks for the PDIU. b. Figure 4–2 below shows the location of each of the main replaceable assemblies in the PDIU: LEGEND: (1) TOP COVER (2) BOTTOM COVER (3) PREFORMED PACKING (4) CIRCUIT CARD ASSEMBLY (CCA) (5) DC–DC CONVERTER (POWER SUPPLY) (6) ELECTRICAL INDICATOR PANEL (7) LED (8) SPRING LATCH ASSEMBLY (9) NEOPRENE RUBBER STRIP(S) (TOP COVER) (10) RFI/EMI CONTACT STRIP (TOP BOTTOM COVERS) Figure 4–2. PDIU Exploded View Change 1 6 3 10 2 7 3 1 9 10 5 4 8