Panasonic KX-TG8421EB Service Manual

Contents

Panasonic KX-TG8421EB Service Manual Manual pdf 3 page image

3KX-TG8421E/KX-TG8422E/KX-TG8423E/KX-TG8424E/KX-TGA840ETABLE OF CONTENTS PAGE PAGE1 Safety Precautions----------------------------------------------- 41.1. For Service Technicians --------------------------------- 42 Warning -------------------------------------------------------------- 42.1. Battery Caution--------------------------------------------- 42.2. About Lead Free Solder (Pbf: Pb free)--------------- 42.3. Discarding of P.C. Board--------------------------------- 53 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 Setting up ----------------------------------------------------------176.1. Connections------------------------------------------------176.2. Battery-------------------------------------------------------177 Operating Instructions-----------------------------------------197.1. Programmable Settings ---------------------------------197.2. Registering a Handset to a Base Unit ---------------227.3. Copying Phonebook Entries ---------------------------237.4. Error Messages -------------------------------------------237.5. Troubleshooting -------------------------------------------247.6. For Service Hint-------------------------------------------288 Service Mode -----------------------------------------------------298.1. Engineering Mode ----------------------------------------298.2. Copying Phonebook Items when Repairing -------338.3. How to Clear User Setting------------------------------359 Troubleshooting Guide ----------------------------------------369.1. Troubleshooting Flowchart -----------------------------369.2. Troubleshooting by Symptom (Base Unit andCharger Unit) ----------------------------------------------489.3. Troubleshooting by Symptom (Handset) -----------5210 Disassembly and Assembly Instructions ---------------5610.1. Disassembly Instructions -------------------------------5610.2. How to Replace the Handset LCD -------------------6011 Measurements and Adjustments---------------------------6111.1. The Setting Method of JIG (Base Unit) -------------6111.2. Adjustment Standard (Base Unit)---------------------6311.3. Adjustment Standard (Charger Unit)-----------------6411.4. The Setting Method of JIG (Handset) ---------------6511.5. Adjustment Standard (Handset) ----------------------6711.6. Things to Do after Replacing IC or X'tal ------------6811.7. RF Specification-------------------------------------------7011.8. How to Check the Handset Speaker orReceiver ----------------------------------------------------7111.9. Frequency Table (MHz) ---------------------------------7112 Miscellaneous ----------------------------------------------------7212.1. CPU Data (Base Unit) -----------------------------------7212.2. CPU Data (Handset)-------------------------------------7412.3. How to Replace the Flat Package IC ----------------7612.4. How to Replace the LLP (Leadless LeadframePackage) IC------------------------------------------------7812.5. Terminal Guide of the ICs, Transistors andDiodes -------------------------------------------------------8013 Schematic Diagram ---------------------------------------------8213.1. For Schematic Diagram -------------------------------- 8213.2. Schematic Diagram (Base Unit)---------------------- 8413.3. Schematic Diagram (Base Unit_Operation) ------- 8613.4. Schematic Diagram (Handset)------------------------ 8813.5. Schematic Diagram (Charger Unit)------------------ 9014 Printed Circuit Board ------------------------------------------ 9114.1. Circuit Board (Base Unit_MAIN) --------------------- 9114.2. Circuit Board (Base Unit_Operation)---------------- 9314.3. Circuit Board (Handset) -------------------------------- 9414.4. Circuit Board (Charger Unit)--------------------------- 9615 Exploded View and Replacement Parts List ----------- 9715.1. Cabinet and Electrical Parts (Base Unit) ----------- 9715.2. Cabinet and Electrical Parts (Handset)------------- 9815.3. Cabinet and Electrical Parts (Charger Unit) ------- 9915.4. Accessories and Packing Materials --------------- 10015.5. Replacement Part List -------------------------------- 105