KX-TG6451CAT, KX-TGA641RUT - Panasonic Telephone Service Manual (repair manual). Page 3

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KX-TG6451CAT/KX-TGA641RUT
TABLE OF CONTENTS
PAGE
PAGE
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 (Cordless Handset) ------------------ 11
4.4. Circuit Operation (Cordless Handset) ---------------12
4.5. Circuit Operation (Charger Unit) ----------------------13
4.6. Signal Route -----------------------------------------------14
5 Location of Controls and Components ------------------17
6 Installation Instructions 
---------------------------------------17
7 Operating Instructions
-----------------------------------------17
7.1. For Service Hint-------------------------------------------17
8 Service Mode -----------------------------------------------------18
8.1. Engineering Mode ----------------------------------------18
8.2. Copying Phonebook Items when Repairing -------22
8.3. How to Clear User Setting------------------------------24
9 Troubleshooting Guide ----------------------------------------25
9.1. Troubleshooting Flowchart -----------------------------25
9.2. Troubleshooting by Symptom (Base Unit and
Charger Unit) ----------------------------------------------37
9.3. Troubleshooting by Symptom (Cordless
Handset) ----------------------------------------------------41
10 Disassembly and Assembly Instructions ---------------45
10.1. Disassembly Instructions -------------------------------45
10.2. Assembly Instructions -----------------------------------49
11 Measurements and Adjustments---------------------------51
11.1. Equipment Required -------------------------------------51
11.2. The Setting Method of JIG (Base Unit) -------------51
11.3. Adjustment Standard (Base Unit)---------------------53
11.4. Adjustment Standard (Charger Unit)-----------------54
11.5. The Setting Method of JIG (Cordless
Handset) ----------------------------------------------------55
11.6. Adjustment Standard (Cordless Handset)----------57
11.7. Things to Do after Replacing IC or X'tal ------------58
11.8. RF Specification-------------------------------------------60
11.9. How to Check the Cordless Handset Speaker
or Receiver -------------------------------------------------61
11.10. Frequency Table (MHz) ---------------------------------61
12 Miscellaneous ----------------------------------------------------62
12.1. How to Replace the Flat Package IC----------------62
12.2. How to Replace the Shield Case ---------------------64
12.3. How to Replace the LLP (Leadless Leadframe
Package) IC------------------------------------------------66
12.4. Terminal Guide of the ICs, Transistors and
Diodes -------------------------------------------------------68
13 Schematic Diagram ---------------------------------------------69
13.1. For Schematic Diagram---------------------------------69
13.2. Schematic Diagram (Base Unit_Main) --------------70
13.3. Schematic Diagram (Base Unit_RF Part) ----------72
13.4. Schematic Diagram (Base Unit_Operation) -------73
13.5. Schematic Diagram (Cordless Handset) -----------74
13.6. Schematic Diagram (Charger Unit) ------------------76
14 Printed Circuit Board ------------------------------------------ 77
14.1. Circuit Board (Base Unit_Main) ---------------------- 77
14.2. Circuit Board (Base Unit_Operation)---------------- 79
14.3. Circuit Board (Cordless Handset)-------------------- 81
14.4. Circuit Board (Charger Unit)--------------------------- 83
15 Exploded View and Replacement Parts List ----------- 84
15.1. Cabinet and Electrical Parts (Base Unit) ----------- 84
15.2. Cabinet and Electrical Parts (Cordless
Handset)---------------------------------------------------- 85
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 86
15.4. Accessories and Packing Materials ----------------- 87
15.5. Replacement Parts List--------------------------------- 89
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