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ORDER NO. KM41311773CE

Premium Design Phone with 
Touchscreen

W: White Version
B: Black Version
(for Russia)
(for Belarus)

KX-PRXA10/15

(Charger Unit)

(Handset)

   Model No 

Base Unit    Handset       Charger Unit     Expandable

KX-PRX120 

1 

  1 (PRXA10)             1              Up to 6 

KX-PRX150 

1 

  1 (PRXA15)             1              Up to 6

KX-PRXA10 

 

  1 (PRXA10)         1 

 

KX-PRXA15 

 

  1 (PRXA15)         1 

 

(Base Unit)

2

This service information is designed for experienced repair technicians only and is not designed for use by the general 
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting 
to service a product. Products powered by electricity should be serviced or repaired only by experienced professional 
technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone 
else could result in serious injury or death.

There are special components used in this equipment which are important for safety. These parts are marked by 
in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that 
these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.
Do not modify the original design without permission of manufacturer.

If lead free solder was used in the manufacture of this product, the printed circuit boards will be marked PbF.
Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear, please read and follow the special instructions described in this manual on the 
use of PbF and how it might be permissible to use Pb solder during service and repair work.

L When you note the serial number, write down all 11 digits. The serial number may be found on the bottom of the unit. 
L The illustrations in this Service Manual may vary slightly from the actual product.

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
4.2.2. 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

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14.3.1. Component View ---------------------------------- 109

15 Exploded View and Replacement Parts List --------- 110

15.1. Cabinet and Electrical Parts (Base Unit) ----------110
15.2. Cabinet and Electrical Parts (Handset) ------------111
15.3. Cabinet and Electrical Parts (Charger Unit) ------112
15.4. Accessories-----------------------------------------------113
15.5. Replacement Part List ---------------------------------114

15.5.1. Base Unit ---------------------------------------------114
15.5.2. Handset -----------------------------------------------115
15.5.3. Charger Unit -----------------------------------------116
15.5.4. Accessories ------------------------------------------116
15.5.5. Screws ------------------------------------------------116
15.5.6. Fixtures and Tools----------------------------------117