Panasonic KX-TG7120FXT Service Manual

Also see for KX-TGA711FXS: Service manual Service manual

Contents

3KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXTTABLE OF CONTENTS PAGE PAGE1 Safety Precaution ------------------------------------------------ 41.1. For Service Technicians --------------------------------- 42 Warning -------------------------------------------------------------- 42.1. Battery Caution--------------------------------------------- 42.2. About Lead Free Solder (Pbf: Pb free)--------------- 43 Specifications ----------------------------------------------------- 64 Technical Descriptions ----------------------------------------- 74.1. Block Diagram (Base Unit) ------------------------------ 74.2. Circuit Operation (Base Unit) --------------------------- 84.3. Block Diagram (Handset)------------------------------- 114.4. Circuit Operation (Handset)----------------------------124.5. Circuit Operation (Charger Unit) ----------------------134.6. Signal Route -----------------------------------------------145 Location of Controls and Components ------------------165.1. Controls -----------------------------------------------------166 Installation Instructions ---------------------------------------166.1. Connections------------------------------------------------166.2. Battery-------------------------------------------------------177 Operation Instructions-----------------------------------------197.1. Base Unit Settings----------------------------------------197.2. Handset Settings -----------------------------------------207.3. Registering a Handset to the Base Unit ------------217.4. For Service Hint-------------------------------------------228 Service Mode -----------------------------------------------------238.1. Engineering Mode ----------------------------------------239 Troubleshooting Guide ----------------------------------------279.1. Troubleshooting Flowchart -----------------------------279.2. Troubleshooting by Symptom (Base Unit andCharger Unit) ----------------------------------------------369.3. Troubleshooting by Symptom (Handset) -----------409.4. How to Replace the Flat Package IC ----------------439.5. How to Replace the LLP (Leadless LeadframePackage) IC------------------------------------------------4510 Disassembly and Assembly Instructions ---------------4710.1. Disassembly Instructions -------------------------------4710.2. How to Replace the Handset LCD -------------------5011 Measurements and Adjustments---------------------------5111.1. The Setting Method of JIG (Base Unit) -------------5111.2. Adjustment Standard (Base Unit)---------------------5311.3. Adjustment Standard (Charger Unit)-----------------5411.4. The Setting Method of JIG (Handset) ---------------5511.5. Adjustment Standard (Handset) ----------------------5711.6. Things to Do after Replacing IC ----------------------5811.7. RF Specification-------------------------------------------5911.8. How to Check the Handset Speaker ofReceiver ----------------------------------------------------6011.9. Frequency Table (MHz) ---------------------------------6012 Schematic Diagram ---------------------------------------------6112.1. For Schematic Diagram---------------------------------6112.2. Schematic Diagram (Base Unit_Main) --------------6212.3. Schematic Diagram (Base Unit_Operation) -------6412.4. Schematic Diagram (Handset) ------------------------6612.5. Schematic Diagram (Charger Unit) ------------------6813 Printed Circuit Board-------------------------------------------6913.1. Circuit Board (Base Unit_Main) -----------------------6913.2. Circuit Board (Base Unit_Operation) ----------------7113.3. Circuit Board (Handset) ---------------------------------7313.4. Circuit Board (Charger Unit) ---------------------------7514 Appendix Information of Schematic Diagram --------- 7614.1. CPU Data (Base Unit) ---------------------------------- 7614.2. CPU Data (Handset) ------------------------------------ 7814.3. Terminal Guide of the ICs, Transistors andDiodes ------------------------------------------------------ 8015 Exploded View and Replacement Parts List ----------- 8115.1. Cabinet and Electric Parts (Base Unit) ------------- 8115.2. Cabinet and Electric Parts (Handset) --------------- 8215.3. Cabinet and Electric Parts (Charger Unit) --------- 8315.4. Accessories and Packing Materials ----------------- 8415.5. Replacement Part List ---------------------------------- 86