KX-PRX120RUW, KX-PRX150RUB, KX-PRXA10RUW, KX-PRXA15RUB - 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) ------------------------------ 8
4.2. Circuit Operation (Base Unit) --------------------------- 9

4.2.1. Outline --------------------------------------------------- 9
4.2.2. Power Supply Circuit--------------------------------10
4.2.3. Telephone Line Interface--------------------------- 11
4.2.4. Transmitter/Receiver-------------------------------- 11

4.3. Block Diagram (Handset)-------------------------------12

4.3.1. KX-PRXA10 -------------------------------------------12
4.3.2. KX-PRXA15 -------------------------------------------14

4.4. Circuit Operation (Charger Unit) ----------------------16

4.4.1. Power Supply Circuit--------------------------------16

4.5. Signal Route -----------------------------------------------17

5 Location of Controls and Components ------------------20
6 Installation Instructions ---------------------------------------20
7 Operating Instructions-----------------------------------------20

7.1. For Service Hint-------------------------------------------20

8 Service Mode -----------------------------------------------------21

8.1. Engineering Mode ----------------------------------------21

8.1.1. Base Unit ----------------------------------------------21
8.1.2. Handset ------------------------------------------------22

8.2. EEPROM LAYOUT (Handset)-------------------------23
8.3. Copying User Data when Repairing -----------------23

8.3.1. Phonebook --------------------------------------------23
8.3.2. Other User Data--------------------------------------23

8.4. How to Clear User Setting------------------------------24

8.4.1. Resetting both base unit and handset----------24
8.4.2. Resetting only handset -----------------------------25

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

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

9.1.1. Check Power------------------------------------------28
9.1.2. Check DECT Link------------------------------------30
9.1.3. Check Touch Panel----------------------------------32
9.1.4. Check DECT RF part -------------------------------33
9.1.5. Check Cellular RF part -----------------------------34
9.1.6. Check Handset Transmission --------------------35
9.1.7. Check Handset Reception-------------------------36
9.1.8. Caller ID Reception (Cellular incoming)

Part ------------------------------------------------------37

9.1.9. Check TAM Operation Part------------------------38

9.1.10. Check Vibrator Motor Part -------------------------39

9.1.11. Check SD Card Part --------------------------------40

9.1.12. Check Camera Part ---------------------------------40
9.1.13. Check Flash Light Part -----------------------------41
9.1.14. Check Sensor Part ----------------------------------41
9.1.15. Check WiFi, BT, GPS Part-------------------------41
9.1.16. Check Battery Charge ------------------------------42

9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit) ----------------------------------------------43

9.2.1. Check Point (Base Unit) ---------------------------43

9.2.2. Check Point (Charger Unit) ----------------------- 45

9.3. Troubleshooting by Symptom (Handset) ----------- 46
9.4. Function Check at Factory Mode -------------------- 47

10 Disassembly and Assembly Instructions--------------- 50

10.1. Disassembly Instructions------------------------------- 50

10.1.1. Base Unit ---------------------------------------------- 50
10.1.2. Handset ------------------------------------------------ 51
10.1.3. Charger Unit ------------------------------------------ 52

11 Measurements and Adjustments -------------------------- 53

11.1. Equipment Required ------------------------------------ 53
11.2. The Setting Method of JIG (Base Unit) ------------- 53

11.2.1. Connections ------------------------------------------ 53
11.2.2. How to install Batch file into P.C. ---------------- 54
11.2.3. Commands-------------------------------------------- 54

11.3. Adjustment Standard (Base Unit) -------------------- 55

11.3.1. Bottom View ------------------------------------------ 55

11.4. Adjustment Standard (Charger Unit) ---------------- 56

11.4.1. Bottom View ------------------------------------------ 56

11.5. Things to Do after Replacing IC or X'tal ------------ 57

11.5.1. How to download the data ------------------------ 57

11.6. RF Specification ------------------------------------------ 58

11.6.1. Base Unit ---------------------------------------------- 58

11.7. DECT Frequency Table (MHz)------------------------ 58
11.8. Bluetooth Frequency Table ---------------------------- 59

12 Miscellaneous---------------------------------------------------- 60

12.1. How to Replace the Flat Package IC --------------- 60

12.1.1. Preparation-------------------------------------------- 60
12.1.2. How to Remove the IC ----------------------------- 60
12.1.3. How to Install the IC -------------------------------- 61
12.1.4. How to Remove a Solder Bridge ---------------- 61

12.2. How to Replace the Shield Case--------------------- 62

12.2.1. Preparation-------------------------------------------- 62
12.2.2. Caution------------------------------------------------- 62
12.2.3. How to Remove the Shield Case---------------- 62
12.2.4. How to Install the Shield Case ------------------- 63

12.3. Terminal Guide of the ICs, Transistors and

Diodes ------------------------------------------------------ 64

12.3.1. Base Unit ---------------------------------------------- 64

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

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

13.1.1. Base Unit (Schematic Diagram (Base

Unit))---------------------------------------------------- 65

13.1.2. Handset (Schematic Diagram (Handset)) ----- 65
13.1.3. Charger Unit (Schematic Diagram

(Charger Unit)) --------------------------------------- 65

13.2. Schematic Diagram (Base Unit)---------------------- 66
13.3. Schematic Diagram (Handset)------------------------ 68

13.3.1. KX-PRXA10RU -------------------------------------- 68
13.3.2. KX-PRXA15RU -------------------------------------- 84

13.4. Schematic Diagram (Charger Unit)---------------- 102

14 Printed Circuit Board ---------------------------------------- 103

14.1. Circuit Board (Base Unit_Main) -------------------- 103

14.1.1. Component View ---------------------------------- 103
14.1.2. Bottom View ---------------------------------------- 104

14.2. Circuit Board (Handset) ------------------------------ 105

14.2.1. KX-PRXA10 ---------------------------------------- 105
14.2.2. KX-PRXA15 ---------------------------------------- 107

14.3. Circuit Board (Charger Unit)------------------------- 109