KX-TGC310RU, KX-TGC312RU, KX-TGC320RU, KX-TGC322RU, KX-TGC310UC, KX-TGC312UC, KX-TGC320UC, KX-TGCA30RU - Panasonic Telephone Service Manual (repair manual). Page 3

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1 Safety Precautions----------------------------------------------- 5

1.1. For Service Technicians --------------------------------- 5

2 Warning -------------------------------------------------------------- 5

2.1. Battery Caution--------------------------------------------- 5
2.2. About Lead Free Solder (PbF: Pb free)-------------- 5

2.2.1. Suggested PbF Solder ------------------------------ 6

2.3. Discarding of P. C. Board-------------------------------- 6

3 Specifications ----------------------------------------------------- 7
4 Technical Descriptions ----------------------------------------- 8

4.1. Block Diagram (Base Unit_Main)---------------------- 8
4.2. Block Diagram (Base Unit_RF Part) ------------------ 9
4.3. Circuit Operation (Base Unit) --------------------------10

4.3.1. BBIC (Base Band IC: IC501) ---------------------10
4.3.2. Flash Memory (IC601)(for KX-TGC320

only) -----------------------------------------------------10

4.3.3. EEPROM (IC611) ------------------------------------10
4.3.4. Power Supply Circuit/Reset Circuit--------------11
4.3.5. Telephone Line Interface---------------------------13
4.3.6. Transmitter/Receiver--------------------------------13

4.4. Block Diagram (Handset)-------------------------------15
4.5. Circuit Operation (Handset)----------------------------16

4.5.1. Outline --------------------------------------------------16
4.5.2. Power Supply Circuit/Reset Circuit--------------16
4.5.3. Charge Circuit ----------------------------------------16
4.5.4. Battery Low/Power Down Detector--------------16
4.5.5. Speakerphone ----------------------------------------16

4.6. Signal Route -----------------------------------------------17

5 Location of Controls and Components ------------------19
6 Installation Instructions ---------------------------------------19
7 Operating Instructions-----------------------------------------19

7.1. For Service Hint-------------------------------------------19

8 Test Mode ----------------------------------------------------------20

8.1. Engineering Mode ----------------------------------------20

8.1.1. Base Unit ----------------------------------------------20
8.1.2. Handset ------------------------------------------------22

8.2. EEPROM LAYOUT (Handset)-------------------------24

8.2.1. Scope ---------------------------------------------------24
8.2.2. Introduction--------------------------------------------24
8.2.3. EEPROM contents ----------------------------------24

8.3. How to Clear User Setting------------------------------25

8.3.1. Resetting both base unit and handset----------25
8.3.2. Resetting only handset -----------------------------25

9 Troubleshooting Guide ----------------------------------------26

9.1. Troubleshooting Flowchart -----------------------------26

9.1.1. Check Power------------------------------------------27
9.1.2. Check Record ----------------------------------------28
9.1.3. Check Playback  -------------------------------------29
9.1.4. Check Battery Charge ------------------------------29
9.1.5. Check Link---------------------------------------------30
9.1.6. Check the RF part -----------------------------------32
9.1.7. Registering a Handset to the Base Unit--------36
9.1.8. Deregistering a Handset ---------------------------36
9.1.9. Check Handset Transmission --------------------37

9.1.10. Check Handset Reception-------------------------37

9.1.11. Check Caller ID --------------------------------------37

9.1.12. Bell Reception ----------------------------------------38
9.1.13. Check TAM Operation (for KX-TGC320

only) -----------------------------------------------------38

9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit)---------------------------------------------- 39

9.2.1. Check Point (Base Unit) --------------------------- 39

9.3. Troubleshooting by Symptom (Handset)----------- 41

9.3.1. Check Point (Handset)----------------------------- 41

10 Disassembly and Assembly Instructions--------------- 44

10.1. Disassembly Instructions------------------------------- 44

10.1.1. Base Unit ---------------------------------------------- 44
10.1.2. Handset------------------------------------------------ 45
10.1.3. Charger Unit ------------------------------------------ 46

10.2. How to Replace the Handset LCD------------------- 47

11 Measurements and Adjustments -------------------------- 48

11.1. Equipment Required ------------------------------------ 48
11.2. The Setting Method of JIG----------------------------- 48

11.2.1. Connections (Base Unit) -------------------------- 48
11.2.2. How to install Batch file into P.C. ---------------- 49
11.2.3. Commands-------------------------------------------- 49

11.3. Adjustment Standard (Base Unit) -------------------- 50

11.3.1. Bottom View ------------------------------------------ 50

11.4. The Setting Method of JIG (Handset)--------------- 51

11.4.1. Connections ------------------------------------------ 51
11.4.2. How to install Batch file into P.C. ---------------- 52
11.4.3. Commands-------------------------------------------- 52

11.5. Adjustment Standard (Handset) ---------------------- 53

11.5.1. Component View ------------------------------------ 53

11.6. Things to Do after Replacing IC or X'tal ------------ 54

11.6.1. How to download the data ------------------------ 54

11.7. RF Specification ------------------------------------------ 56

11.7.1. Base Unit ---------------------------------------------- 56
11.7.2. Handset------------------------------------------------ 56

11.8. How to Check the Handset Speaker or

Receiver ---------------------------------------------------- 57

11.9. Frequency Table (MHz)--------------------------------- 57

12 Miscellaneous---------------------------------------------------- 58

12.1. How to Replace the Flat Package IC --------------- 58

12.1.1. Preparation-------------------------------------------- 58
12.1.2. How to Remove the IC----------------------------- 58
12.1.3. How to Install the IC -------------------------------- 59
12.1.4. How to Remove a Solder Bridge ---------------- 59

12.2. How to Replace the Shield Case--------------------- 60

12.2.1. Preparation-------------------------------------------- 60
12.2.2. Caution------------------------------------------------- 60
12.2.3. How to Remove the Shield Case---------------- 60
12.2.4. How to Install the Shield Case ------------------- 61

12.3. Terminal Guide of the ICs, Transistors and

Diodes ------------------------------------------------------ 62

12.3.1. Base Unit ---------------------------------------------- 62
12.3.2. Handset------------------------------------------------ 62

13 Schematic Diagram -------------------------------------------- 63

13.1. For Schematic Diagram -------------------------------- 63

13.1.1. Base Unit (Base Unit (Main))--------------------- 63
13.1.2. Handset (Handset (Main)) ------------------------ 63

13.2. Base Unit (Main) ----------------------------------------- 64

13.2.1. KX-TGC310------------------------------------------- 64
13.2.2. KX-TGC320------------------------------------------- 66

13.3. Handset (Main) ------------------------------------------- 68

14 Printed Circuit Board ------------------------------------------ 71

14.1. Base Unit (Main) ----------------------------------------- 71