Table Of Contents - Panasonic KX-TG6521BXB Service Manual

TABLE OF CONTENTS

1 Safety Precautions----------------------------------------------- 4
1.1. For Service Technicians --------------------------------- 4
2 Warning -------------------------------------------------------------- 4
2.1. Battery Caution--------------------------------------------- 4
2.2. About Lead Free Solder (Pbf: Pb free)--------------- 4
2.3. Discarding of P.C. Board--------------------------------- 5
3 Specifications ----------------------------------------------------- 6
4 Technical Descriptions ----------------------------------------- 7
4.1. Block Diagram (Base Unit) ------------------------------ 7
4.2. Circuit Operation (Base Unit) --------------------------- 8
4.3. Block Diagram (Handset)------------------------------- 11
4.4. Circuit Operation (Handset)----------------------------12
4.5. Signal Route -----------------------------------------------13
5 Location of Controls and Components ------------------15
6 Installation Instructions ---------------------------------------15
7 Operating Instructions-----------------------------------------15
7.1. For Service Hint-------------------------------------------15
8 Service Mode -----------------------------------------------------16
8.1. Engineering Mode ----------------------------------------16
8.2. Copying Phonebook Items when Repairing -------20
8.3. How to Clear User Setting------------------------------22
9 Troubleshooting Guide ----------------------------------------23
9.1. Troubleshooting Flowchart -----------------------------23
9.2. Troubleshooting by Symptom (Base Unit) ---------35
9.3. Troubleshooting by Symptom (Handset) -----------39
10 Disassembly and Assembly Instructions ---------------43
10.1. Disassembly Instructions -------------------------------43
10.2. How to Replace the Handset LCD -------------------46
11 Measurements and Adjustments---------------------------47
11.1. Equipment Required -------------------------------------47
11.2. The Setting Method of JIG (Base Unit) -------------47
11.3. Adjustment Standard (Base Unit)---------------------49
11.4. The Setting Method of JIG (Handset) ---------------50
11.5. Adjustment Standard (Handset) ----------------------52
11.6. Things to Do after Replacing IC or X'tal ------------53
11.7. RF Specification-------------------------------------------55
11.8. How to Check the Handset Speaker or
Receiver ----------------------------------------------------56
11.9. Frequency Table (MHz) ---------------------------------56
12 Miscellaneous ----------------------------------------------------57
12.1. How to Replace the Flat Package IC ----------------57
12.2. How to Replace the Shield Case ---------------------59
12.3. Terminal Guide of the ICs, Transistors, Diodes
and Electrolytic Capacitors-----------------------------61
13 Schematic Diagram ---------------------------------------------63
13.1. For Schematic Diagram---------------------------------63
13.2. Schematic Diagram (Base Unit) ----------------------64
13.3. Schematic Diagram (Base Unit_Operation) -------66
13.4. Schematic Diagram (Handset) ------------------------68
14 Printed Circuit Board-------------------------------------------71
14.1. Circuit Board (Base Unit_Main) -----------------------71
14.2. Circuit Board (Base Unit_Operation) ----------------73
14.3. Circuit Board (Handset) ---------------------------------75
15 Exploded View and Replacement Parts List -----------77
15.1. Cabinet and Electrical Parts (Base Unit) -----------77
15.2. Cabinet and Electrical Parts (Handset) -------------78
15.3. Accessories ------------------------------------------------79
15.4. Replacement Part List-----------------------------------80
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KX-TG6521BXB/KX-TGA651BXB