Table Of Contents - Panasonic KX-TG4021LAT 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. US-DECT Description ------------------------------------ 7
4.2. Block Diagram (Base Unit_Main)---------------------- 9
4.3. Block Diagram (Base Unit_RF Part) -----------------10
4.4. Circuit Operation (Base Unit) -------------------------- 11
4.5. Block Diagram (Handset)-------------------------------18
4.6. Block Diagram (Handset_RF Part)-------------------19
4.7. Circuit Operation (Handset)----------------------------20
4.8. Circuit Operation (Charger Unit) ----------------------22
4.9. Signal Route -----------------------------------------------23
5 Location of Controls and Components ------------------25
6 Installation Instructions ---------------------------------------25
7 Operating Instructions-----------------------------------------25
8 Test Mode ----------------------------------------------------------26
8.1. Engineering Mode ----------------------------------------26
9 Service Mode -----------------------------------------------------30
9.1. How to Clear User Setting (Handset Only)---------30
10 Troubleshooting Guide ----------------------------------------31
10.1. Troubleshooting Flowchart -----------------------------31
11 Disassembly and Assembly Instructions ---------------43
11.1. Disassembly Instructions -------------------------------43
11.2. How to Replace the Handset LCD -------------------47
12 Measurements and Adjustments---------------------------48
12.1. Equipment Required -------------------------------------48
12.2. The Setting Method of JIG -----------------------------48
12.3. Adjustment Standard (Base Unit)---------------------51
12.4. Adjustment Standard (Charger Unit)-----------------52
12.5. Adjustment Standard (Handset) ----------------------53
12.6. Things to Do after Replacing IC or X'tal ------------54
12.7. Frequency Table ------------------------------------------56
13 Miscellaneous ----------------------------------------------------57
13.1. How to Replace the Flat Package IC ----------------57
13.2. How to Replace the Shield Case ---------------------59
13.3. How to Replace the LLP (Leadless Leadframe
Package) IC------------------------------------------------61
13.4. Terminal Guide of the ICs, Transistors and
Diodes -------------------------------------------------------63
14 Schematic Diagram ---------------------------------------------64
14.1. For Schematic Diagram---------------------------------64
14.2. Schematic Diagram (Base Unit_Main) --------------66
14.3. Schematic Diagram (Base Unit_Operation) -------68
14.4. Schematic Diagram (Handset_Main) ----------------70
14.5. Schematic Diagram (Charger Unit) -----------------72
15 Printed Circuit Board-------------------------------------------73
15.1. Circuit Board (Base Unit_Main) -----------------------73
15.2. Circuit Board (Base Unit_Operation) ----------------75
15.3. Circuit Board (Handset_Main)-------------------------77
15.4. Circuit Board (Charger Unit) ---------------------------79
16 Exploded View and Replacement Parts List -----------80
16.1. Cabinet and Electrical Parts (Base Unit) -----------80
16.2. Cabinet and Electrical Parts (Handset) -------------81
KX-TG4021LAT/KX-TG4022LAT/KX-TG4023LAT/KX-TGA403LAT
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16.3. Cabinet and Electrical Parts (Charger Unit) ------- 82
16.4. Accessories------------------------------------------------ 83
16.5. Replacement Parts List--------------------------------- 84
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