KX-TG1411CAM, KX-TG1411CAT, KX-TG1412CA1, KX-TGA141RUM, KX-TGA141RUT - Panasonic Telephone Service Manual (repair manual). Page 3

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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)-------------------------------10
4.4. Circuit Operation (Handset)----------------------------11
4.5. Circuit Operation (Charger Unit) ----------------------11
4.6. Signal Route -----------------------------------------------12

5 Location of Controls and Components ------------------13
6 Installation Instructions ---------------------------------------13
7 Operating Instructions-----------------------------------------13

7.1. For Service Hint-------------------------------------------13

8 Test Mode ----------------------------------------------------------14

8.1. Engineering Mode ----------------------------------------14

9 Troubleshooting Guide ----------------------------------------18

9.1. Troubleshooting Flowchart -----------------------------18
9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit) ----------------------------------------------24

9.3. Troubleshooting by Symptom (Handset) -----------27

10 Disassembly and Assembly Instructions ---------------29

10.1. Disassembly Instructions -------------------------------29
10.2. How to Replace the Handset LCD -------------------32

11 Measurements and Adjustments---------------------------33

11.1. Equipment Required -------------------------------------33
11.2. The Setting Method of JIG (Base Unit) -------------33
11.3. Adjustment Standard (Base Unit)---------------------35
11.4. Adjustment Standard (Charger Unit)-----------------36
11.5. The Setting Method of JIG (Handset) ---------------37
11.6. Adjustment Standard (Handset) ----------------------39
11.7. Things to Do after Replacing IC ----------------------40
11.8. RF Specification-------------------------------------------41
11.9. How to Check the Handset Speaker or

Receiver ----------------------------------------------------42

11.10. Frequency Table (MHz) ---------------------------------42

12 Miscellaneous ----------------------------------------------------43

12.1. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------43

13 Schematic Diagram ---------------------------------------------44

13.1. For Schematic Diagram---------------------------------44
13.2. Schematic Diagram (Base Unit) ----------------------46
13.3. Schematic Diagram (Handset) ------------------------47
13.4. Schematic Diagram (Charger Unit) ------------------48

14 Printed Circuit Board-------------------------------------------49

14.1. Circuit Board (Base Unit) -------------------------------49
14.2. Circuit Board (Base Unit_Career) --------------------51
14.3. Circuit Board (Handset) ---------------------------------53
14.4. Circuit Board (Handset_Career) ----------------------55
14.5. Circuit Board (Charger Unit) ---------------------------57

15 Exploded View and Replacement Parts List -----------58

15.1. Replacement Part List-----------------------------------59