Table of Contents
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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)-------------- 5
2.3. Discarding of P. C. Board-------------------------------- 5
3 Specifications ----------------------------------------------------- 6
4 Technical Descriptions ----------------------------------------- 7
Phones ------------------------------------------------------- 7
4.2. US-DECT Description ------------------------------------ 8
4.3. Block Diagram (Base Unit_Main)---------------------10
4.4. Tel Interface Circuit--------------------------------------- 11
4.5. Block Diagram (Base Unit_RF Part) -----------------12
4.6. Circuit Operation (Base Unit) --------------------------13
4.7. Block Diagram (Handset)-------------------------------20
4.8. Block Diagram (Handset_RF Part)-------------------21
4.9. Circuit Operation (Handset)----------------------------22
4.10. Circuit Operation (Charger Unit) ----------------------24
4.11. Signal Route -----------------------------------------------25
5 Location of Controls and Components ------------------27
6 Installation Instructions ---------------------------------------27
7 Operating Instructions-----------------------------------------27
8 Test Mode ----------------------------------------------------------28
8.1. Engineering Mode ----------------------------------------28
9 Service Mode -----------------------------------------------------32
10 Troubleshooting Guide ----------------------------------------33
10.1. Troubleshooting Flowchart -----------------------------33
11 Disassembly and Assembly Instructions ---------------49
11.1. Disassembly Instructions -------------------------------49
11.2. How to Replace the Base Unit LCD -----------------53
11.3. How to Replace the Handset LCD -------------------55
12 Measurements and Adjustments---------------------------56
12.1. Equipment Required -------------------------------------56
12.2. The Setting Method of JIG -----------------------------56
12.3. Adjustment Standard (Base Unit)---------------------60
12.4. Adjustment Standard (Charger Unit)-----------------61
12.5. Adjustment Standard (Handset) ----------------------62
12.6. Things to Do after Replacing IC or X'tal ------------63
12.7. Frequency Table ------------------------------------------65
12.8. Bluetooth Frequency Table-----------------------------66
13 Miscellaneous ----------------------------------------------------67
Package) IC------------------------------------------------67
13.2. How to Replace the Flat Package IC ----------------69
Diodes -------------------------------------------------------71
14 Schematic Diagram ---------------------------------------------72
14.1. For Schematic Diagram---------------------------------72
14.2. Schematic Diagram (Base Unit_Main) --------------74
14.3. Schematic Diagram (Base Unit_RF)-----------------76
14.5. Schematic Diagram (Handset_Main) ----------------78
14.6. Schematic Diagram (Charger Unit) -----------------80
15 Printed Circuit Board-------------------------------------------81
15.1. Circuit Board (Base Unit_Main) -----------------------81
15.2. Circuit Board (Base Unit_Operation) ----------------83
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3
KX-TG7731S/KX-TG7732S/KX-TG7733S/KX-TGA470S
15.3. Circuit Board (Handset_Main) ------------------------ 85
15.4. Circuit Board (Charger Unit)--------------------------- 87
16 Exploded View and Replacement Parts List ----------- 88
16.1. Cabinet and Electrical Parts (Base Unit) ----------- 88
16.2. Cabinet and Electrical Parts (Handset)------------- 89
16.4. Accessories and Packing Materials ----------------- 91
16.5. Replacement Parts List--------------------------------- 95
PAGE
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