2KX-T7765XTABLE OF CONTENTS PAGE PAGE1 Safety Precautions -----------------------------------------------31.1. For Service Technicians ----------------------------------32 Warning --------------------------------------------------------------42.1. About Lead Free Solder (PbF: Pb free) --------------43 Specifications ------------------------------------------------------54 Installation Instructions-----------------------------------------54.1. Installing the Doorphone ---------------------------------55 Disassembly and Assembly Instructions -----------------66 Miscellaneous ------------------------------------------------------76.1. Terminal Guide of the ICs, Transistors andDiodes---------------------------------------------------------77 Schematic Diagram-----------------------------------------------87.1. Circuit Operation -------------------------------------------88 Printed Circuit Board --------------------------------------------88.1. Component View -------------------------------------------89 Appendix Information of Schematic Diagram -----------910 Exploded View and Replacement Parts List ----------- 1010.1. Cabinet and electrical Parts Location --------------- 1010.2. Accessories and Packing Materials ----------------- 1110.3. Replacement Part List ---------------------------------- 12