KX-TG1311CAH, KX-TG1311CAL, KX-TG1311CAV, KX-TG1312CA2, KX-TG1312CA3, KX-TGA131RUA, KX-TGA131RUH, KX-TGA131RUL, KX-TGA131RUV - 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

5.1. Location of Controls--------------------------------------13

6 Installation Instructions ---------------------------------------13

6.1. Connections------------------------------------------------13
6.2. Battery ------------------------------------------------------14

7 Operating Instructions-----------------------------------------15

7.1. Guide to Base Unit Settings ---------------------------15
7.2. Guide to Handset Settings -----------------------------16
7.3. Dialling Mode ----------------------------------------------16
7.4. For Service Hint-------------------------------------------17

8 Service Mode -----------------------------------------------------18

8.1. Engineering Mode ----------------------------------------18

9 Troubleshooting Guide ----------------------------------------22

9.1. Troubleshooting Flowchart -----------------------------22
9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit) ----------------------------------------------28

9.3. Troubleshooting by Symptom (Handset) -----------31

10 Disassembly and Assembly Instructions ---------------33

10.1. Disassembly Instructions -------------------------------33
10.2. How to Replace the Handset LCD -------------------36

11 Measurements and Adjustments---------------------------37

11.1. The Setting Method of JIG (Base Unit) -------------37
11.2. Adjustment Standard (Base Unit)---------------------39
11.3. Adjustment Standard (Charger Unit)-----------------40
11.4. The Setting Method of JIG (Handset) ---------------41
11.5. Adjustment Standard (Handset) ----------------------43
11.6. Things to Do after Replacing IC ----------------------44
11.7. RF Specification-------------------------------------------45
11.8. How to Check the Handset Speaker or

Receiver ----------------------------------------------------46

11.9. Frequency Table (MHz) ---------------------------------46

12 Miscellaneous ----------------------------------------------------47

12.1. CPU Data (Base Unit) -----------------------------------47
12.2. CPU Data (Handset)-------------------------------------49
12.3. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------51

13 Schematic Diagram ---------------------------------------------53

13.1. For Schematic Diagram---------------------------------53
13.2. Schematic Diagram (Base Unit) ----------------------54
13.3. Schematic Diagram (Handset) ------------------------55
13.4. Schematic Diagram (Charger Unit) ------------------56

14 Printed Circuit Board-------------------------------------------57

14.1. Circuit Board (Base Unit) -------------------------------57
14.2. Circuit Board (Base Unit_Career) --------------------59

14.3. Circuit Board (Handset) -------------------------------- 61
14.4. Circuit Board (Handset_Career)---------------------- 63
14.5. Circuit Board (Charger Unit)--------------------------- 64

15 Exploded View and Replacement Parts List ----------- 65

15.1. Cabinet, Electrical Parts and Accessories

(Base Unit/Handset)------------------------------------- 65

15.2. Replacement Part List ---------------------------------- 66