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 4–20 4–19. ELECTRICAL INDICA TOR P ANEL, LEDs DS1 AND DS2 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: Adhesive/Sealant (item 3, Appendix D) Cleaning Cloth (item 13, Appendix D) Label (item 19, Appendix D) Solder (item 28, Appendix D) Soldering Flux (item 18, Appendix D) Alcohol, Denatured (item 4, Appendix D) Brush, Acid Swabbing (item 11, Appendix D) Equipment Condition: Electrical Indicator Panel removed; if not, remove the Electrical Indicator Panel in accordance with para- graph 4–18 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. Using tag leads to DS1 (1) or DS2 (2). Note pin 1 and pin 2 location. 3. Unsolder leads to DS1 (1) or DS2 (2). 4. Remove nut (3) and lockwasher (4) from LED and remove LED. Change 1 5 2 3 1 PIN 1 PIN 2 LED CONNECTIONS 4