KX-TGH210RUB, KX-TGH210RUW, KX-TGH212RUB, KX-TGH220RUB, KX-TGH220RUW, KX-TGH222RUB, KX-TGHA20RUB, KX-TGHA20RUW - Panasonic Telephone Service Manual (repair manual). Page 3

3

PAGE

PAGE

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) ------------------------------ 8
4.2. Circuit Operation (Base Unit) --------------------------- 9

4.2.1. Outline --------------------------------------------------- 9

4.3. Block Diagram (Base Unit RF Part)------------------10
4.4. Circuit Operation (Base Unit) -------------------------- 11

4.4.1. BBIC (Base Band IC: IC501) --------------------- 11
4.4.2. Flash Memory (IC601)(for KX-TGH220

only) ----------------------------------------------------- 11

4.4.3. EEPROM (IC611) ------------------------------------ 11
4.4.4. Power Supply Circuit--------------------------------12
4.4.5. Telephone Line Interface---------------------------13
4.4.6. Transmitter/Receiver--------------------------------13

4.5. Block Diagram (Handset)-------------------------------14
4.6. Circuit Operation (Handset)----------------------------15

4.6.1. Outline --------------------------------------------------15
4.6.2. Power Supply Circuit/Reset Circuit--------------15
4.6.3. Charge Circuit ----------------------------------------15
4.6.4. Battery Low/Power Down Detector--------------15
4.6.5. Speakerphone ----------------------------------------15

4.7. Behavior of Electric Power Failure -------------------16
4.8. 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 Service 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 Battery Charge ------------------------------28
9.1.3. Check Link---------------------------------------------29
9.1.4. Check the RF part -----------------------------------32
9.1.5. Check Handset Transmission --------------------35
9.1.6. Check Handset Reception-------------------------35
9.1.7. Check Caller ID --------------------------------------35
9.1.8. Bell Reception ----------------------------------------36
9.1.9. Check TAM Operation (for KX-TGH220

only) -----------------------------------------------------36

9.1.10. Power failure mode----------------------------------37

9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit)---------------------------------------------- 38

9.2.1. Check Point (Base Unit) --------------------------- 38

9.3. Troubleshooting by Symptom (Handset) ----------- 40

9.3.1. Check Point (Handset) ----------------------------- 40

10 Disassembly and Assembly Instructions--------------- 43

10.1. Disassembly Instructions------------------------------- 43

10.1.1. Base Unit ---------------------------------------------- 43
10.1.2. Handset ------------------------------------------------ 46
10.1.3. Charger Unit ------------------------------------------ 47

10.2. How to Replace the Handset LCD------------------- 48

11 Measurements and Adjustments -------------------------- 49

11.1. Equipment Required ------------------------------------ 49
11.2. The Setting Method of JIG (Base Unit) ------------- 49

11.2.1. Connections ------------------------------------------ 49
11.2.2. How to install Batch file into P.C. ---------------- 50
11.2.3. Commands-------------------------------------------- 50

11.3. Adjustment Standard (Base Unit) -------------------- 51

11.3.1. Bottom View ------------------------------------------ 51

11.4. The Setting Method of JIG (Handset)--------------- 52

11.4.1. Connections ------------------------------------------ 52
11.4.2. How to install Batch file into P.C. ---------------- 53
11.4.3. Commands-------------------------------------------- 53

11.5. Adjustment Standard (Handset) ---------------------- 54

11.5.1. Component View ------------------------------------ 54

11.6. Things to Do after Replacing IC or X'tal ------------ 55

11.6.1. How to download the data ------------------------ 55

11.7. RF Specification ------------------------------------------ 57

11.7.1. Base Unit ---------------------------------------------- 57
11.7.2. Handset ------------------------------------------------ 57

11.8. How to Check the Handset Speaker or

Receiver ---------------------------------------------------- 58

11.9. Frequency Table (MHz)--------------------------------- 58

12 Miscellaneous---------------------------------------------------- 59

12.1. How to Replace the Flat Package IC --------------- 59

12.1.1. Preparation-------------------------------------------- 59
12.1.2. How to Remove the IC ----------------------------- 59
12.1.3. How to Install the IC -------------------------------- 60
12.1.4. How to Remove a Solder Bridge ---------------- 60

12.2. How to Replace the Shield Case--------------------- 61

12.2.1. Preparation-------------------------------------------- 61
12.2.2. Caution------------------------------------------------- 61
12.2.3. How to Remove the Shield Case---------------- 61
12.2.4. How to Install the Shield Case ------------------- 62

12.3. Terminal Guide of the ICs, Transistors, Diodes

and Electrolytic Capacitors ---------------------------- 63

12.3.1. Base Unit ---------------------------------------------- 63
12.3.2. Handset ------------------------------------------------ 63

13 Schematic Diagram -------------------------------------------- 65

13.1. For Schematic Diagram -------------------------------- 65

13.1.1. Base Unit (Base Unit (Main)) --------------------- 65
13.1.2. Handset (Handset) ---------------------------------- 65

13.2. Base Unit (Main) ----------------------------------------- 66

13.2.1. KX-TGH210RU -------------------------------------- 66
13.2.2. TGH220RU ------------------------------------------- 68

13.3. Base Unit (Operation)----------------------------------- 70
13.4. Handset----------------------------------------------------- 72

14 Printed Circuit Board ------------------------------------------ 75