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 4–15 4–17. DC–DC CONVERTER (POWER SUPPL Y) (PS1) DESCRIPTION This task covers: a. Removal b. Installation INITIAL SETUP Tools: Tool Kit, JTK–17LAL (item 34, Appendix E) Tool Kit, General Mechanic’s (item 42, Appendix E) Materials/Parts: Thread Compound (item 14, Appendix D) Equipment Condition: Top and bottom covers removed; if not, remove top and bottom covers in accordance with paragraph 4–13 Personnel Required: One MOS 35Y a. REMOVAL CAUTION ESD SENSITIVE • The PDIU contains ESD sensitive components. Wear a protective ESD wrist strap whenever handling components. Failure to comply may result in damage to equipment. • Damage to RFI/EMI contact strip may occur. Do not slide cover off of housing. Pick cover straight up. 1. Attach ESD grounding strap to wrist and ground to ensure ESD protection. 2. Remove six cap screws (1) and six flat washers (2) securing power supply (3) to housing (4). 3. Carefully move power supply (3), left and then right, so that two captive screws (5) on connector P1 (6) and P2 (7) are accessible. Loosen two captive screws (5) on each connector. 4. Disconnect P1 (6) from PS1–J1 (8), P2 (7) from PS1–J2 (9) and remove power supply (3) from housing (4). 1 6 5 5 5 7 9 2 4 3 8 5