Table Of Contents - Panasonic KX-TG234SK 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)-------------- 5
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) ----------------------21
4.9. Signal Route -----------------------------------------------22
5 Location of Controls and Components ------------------24
6 Installation Instructions ---------------------------------------24
7 Operating Instructions-----------------------------------------24
8 Test Mode ----------------------------------------------------------25
8.1. Engineering Mode ----------------------------------------25
9 Service Mode -----------------------------------------------------29
9.1. How to Clear User Setting (Handset Only)---------29
10 Troubleshooting Guide ----------------------------------------30
10.1. Troubleshooting Flowchart -----------------------------30
11 Disassembly and Assembly Instructions ---------------44
11.1. Disassembly Instructions -------------------------------44
11.2. How to Replace the Base Unit LCD -----------------48
11.3. How to Replace the Handset LCD -------------------50
12 Measurements and Adjustments---------------------------51
12.1. Equipment Required -------------------------------------51
12.2. The Setting Method of JIG -----------------------------51
12.3. Adjustment Standard (Base Unit)---------------------55
12.4. Adjustment Standard (Charger Unit)-----------------56
12.5. Adjustment Standard (Handset) ----------------------57
12.6. Things to Do after Replacing IC or X'tal ------------58
12.7. Frequency Table ------------------------------------------60
13 Miscellaneous ----------------------------------------------------61
13.1. How to Replace the LLP (Leadless Leadframe
Package) IC------------------------------------------------61
13.2. How to Replace the Flat Package IC ----------------63
13.3. Terminal Guide of the ICs, Transistors and
Diodes -------------------------------------------------------65
14 Schematic Diagram ---------------------------------------------67
14.1. For Schematic Diagram---------------------------------67
14.2. Schematic Diagram (Base Unit_Main) --------------68
14.3. Schematic Diagram (Base Unit_Operation) -------70
14.4. Schematic Diagram (Handset_Main) ----------------72
14.5. Schematic Diagram (Handset_LED)-----------------74
14.6. Schematic Diagram (Charger Unit) -----------------75
15 Printed Circuit Board-------------------------------------------77
15.1. Circuit Board (Base Unit_Main) -----------------------77
15.2. Circuit Board (Base Unit_Operation) ----------------79
15.3. Circuit Board (Handset_Main)-------------------------81
15.4. Circuit Board (Handset_LED) -------------------------83
15.5. Circuit Board (Charger Unit) ---------------------------84
16 Exploded View and Replacement Parts List -----------85
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16.1. Cabinet and Electrical Parts (Base Unit) ----------- 85
16.2. Cabinet and Electrical Parts (Handset)------------- 86
16.3. Cabinet and Electrical Parts (Charger Unit) ------- 87
16.4. Accessories ----------------------------------------------- 88
16.5. Replacement Parts List--------------------------------- 89
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KX-TG234SK/KX-TGA470B
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