2KX-T7730CATABLE OF CONTENTS PAGE PAGE1 Safety Precautions ------------------------------------------- ---31.1. For Service Technicians ----------------------------- ---32 Warning ---------------------------------------------------------- ---32.1. About Lead Free Solder (PbF: Pb free) ---------- ---33 Specifications -------------------------------------------------- ---44 Technical Descriptions-------------------------------------- ---54.1. Block Diagram ------------------------------------------ ---54.2. Circuit Operations -------------------------------------- ---65 Location of Controls and Components---------------- - 136 Installation Instructions------------------------------------- - 146.1. Connection----------------------------------------------- - 147 Troubleshooting Guide-------------------------------------- - 157.1. No Operation -------------------------------------------- - 157.2. Handset Trouble---------------------------------------- - 167.3. Speaker-Phone Trouble ------------------------------ - 177.4. TONE Dial Trouble------------------------------------- - 177.5. The Electronic Volume of the Speaker-PhoneDoes Not Work-------------------------------------------- 187.6. The Electronic Volume of Handset Does Not Work188 Disassembly and Assembly Instructions ------------- - 199 Miscellaneous -------------------------------------------------- - 219.1. Terminal Guide of ICs, Transistors and Diodes- - 219.2. How To Replace a Flat Package IC --------------- - 229.3. Memo------------------------------------------------------ - 2310 Schematic Diagram------------------------------------------- - 2411 Printed Circuit Board ---------------------------------------- - 2611.1. Component View --------------------------------------- - 2611.2. Bottom View --------------------------------------------- - 2712 Appendix Information of Schematic Diagram ------- - 2713 Exploded View and Replacement Parts List --------- - 2813.1. IC1 --------------------------------------------------------- - 2813.2. Cabinet and Electrical Parts Location------------- - 3013.3. Accessories and Packing Materials --------------- - 3113.4. Replacement Parts List ------------------------------- - 32