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BLUETOOTH  INFORMATION  WRITING  METHOD
When the complete MAIN board, knob (VOL) (SV) assy or front 
panel (SV) assy is replaced, the writing of Bluetooth information 
is necessary.
Write the Bluetooth information according to the procedure below.

Preparation:
• Windows 

PC

• 

NFC compatible smartphone that installed the fi le manager ap-
plication (ASTRO File Manager, File Expert, etc.)

• 

USB cable for the smartphone

• 

NFCtagWriter.apk (ver.1.0.2 and above)

Note 1: The NFCtagWriter.apk is updated. When the NFCtagWriter.apk 

is prepared already, be sure to refer to the “6. Version Check 
Method of the NFC Tag Data Writing Application for the Servic-
ing” on the page 12, and check the version of NFCtagWriter.apk.

Note 2: Confi rm the method of obtaining the 

NFCtagWriter.apk 

to the 

service headquarters.

Install the NFCtagWriter.apk on the smartphone for writing of 
Bluetooth information.

Procedure:
1.  Prepare the NFCtagWriter.apk fi le on the PC.
2.  Connect the smartphone to the PC with the USB cable.
3.  Transfer the NFCtagWriter.apk to the smartphone.
4.  When tapping the “Settings” → “Security” on the screen of the 

smartphone, check the box “Unknown sources”.

5.  Disconnect the smartphone from the PC.
6. Use 

the 

fi le manager application to explore the NFCtagWriter.

apk on the smartphone.

7.  Click on the NFCtagWriter.apk to open it, and install the 

NFCtagWriter.apk to the smartphone.

8.  When tapping the “Settings” → “Security” on the screen of the 

smartphone, uncheck the box “Unknown sources”.

Movies

YouTube

Camera

Settings

Album

WALKMAN

Play Store

Browser

Maps

Media Player

Chrome

NFCtagWriter

9.  Refer to the “6. Version Check Method of the NFC Tag Data 

Writing Application for the Servicing” on the page 14, and 
check the version of NFCtagWriter.apk.

 

ver.0.9.0 

:  The use is not allowed.

 

 

  Install the NFCtagWriter.apk of ver.1.0.2 

and above.

 

ver.1.0.2 and above :  The use is allowed.

– Continued on next page –

2.  Writing the NFC Tag Data
Write the NFC tag data (Bluetooth information) to the NFC mod-
ule in the knob (VOL) (SV) assy.

Procedure:
1.  Check the Bluetooth address (BD_ADDR).
 

There are following two checking methods.

 

• 

How to read from the BT module label

 

• 

How to display on the liquid crystal display by the test mode

 

Set the unit to the state where the BT module (Ref. No. IC1002 
on the MAIN board) can be seen.

 

(Refer to the “3. DISASSEMBLY” on the page 25 and after)

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1.  In the state of source off (the clock is displayed on the 

liquid crystal display),  enter the test mode by pressing the 
buttons in order of the [

 4] 

t [MIC 5] t [PAUSE 6] 

(press only the [PAUSE 6] button for two seconds).

 

 

(Displayed characters/values in the following fi gure  are 
example)

 

 

2.  In the state in which the software main version is displayed 

on the liquid crystal display, enter the Bluetooth address 
(BD_ADDR) display mode by pressing the [

 

SCRL 

DSPL] button.

 

 

(Displayed characters/values in the following fi gure  are 
example)

 

1: When pressing the [  SCRL DSPL] button again, the desti-

nation code is displayed on the liquid crystal display, but it is 
not necessary to display in this step.

 

3.  The resetting operation is executed by pressing the [

 

OFF 

SRC] button for 1 second after the confi rming ends, and 
the unit returns to the normal condition.

2.  Turn on the NFC function of the smartphone.
3.  Start the NFCtagWriter application on the smartphone.
4.  Tap the “Write” on the screen of the smartphone.

– Continued on next page –

5.  Input the Bluetooth Local Name (BL_NAME).
 

(Input the model name with the keyboard on the smartphone, 
or tap the “List” on the screen of the smartphone and select the 
model name)

Bluetooth Local Name

Bluetooth Device Addres

6.  Input the Bluetooth address (BD_ADDR).
 

(Input the Bluetooth address (BD_ADDR) that written on the 
BT module label with the keyboard on the smartphone, or tap 
the “QR” on the screen of the smartphone and read the barcode 
with the camera of the smartphone)

Bluetooth Device Addres

MEX-XB100BT

7.  Tap the “Write” on the screen of the smartphone, in the state 

that unchecked the box “Read-only”.

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MEX-XB100BT

8.  Touch the N-mark part of the smartphone to the N-mark part of 

the unit.

9.  Check that “Completed!” is displayed on the screen of the 

smartphone.

Note 2: When “Completed!” is not displayed on the screen of the smart-

phone, refer to “3. Error Display” on the page 12.

10. End the NFCtagWriter application on the smartphone.
11.  Check the operation of connecting with the smartphone by one 

touch (NFC).

 

(Refer to the 

“OPERATION CHECK OF THE NFC AFTER  

COMPLETING THE REPAIRS” on the page 7)

12. Start the NFCtagWriter application on the smartphone.
13. Tap the “Write” on the screen of the smartphone.

14. Check the box “Read-only” on the screen of the smartphone, 

and tap the “Write” on the screen of the smartphone.

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MEX-XB100BT

– Continued on next page –

15.  Touch the N-mark part of the smartphone to the N-mark part of 

the unit.

16. Check that “Completed!” is displayed on the screen of the 

smartphone.

Note 3: When “Completed!” is not displayed on the screen of the smart-

phone, refer to “3. Error Display”.

17. Tap the “Read” on the screen of the smartphone.

18. Check that “BD_ADDR” on the screen of the smartphone ac-

cords with BD_ADDR written on the BT module label and 
“MODE” on the screen of the smartphone is “00 00 (Read-
only)”.

19. End the NFCtagWriter application on the smartphone.
20.  Check the operation of connecting with the smartphone by one 

touch (NFC).

 

(Refer to the 

“OPERATION CHECK OF THE NFC AFTER  

COMPLETING THE REPAIRS” on the page 7)

When the writing of the NFC tag data has failed, “Error” is dis-
played on the screen of the smartphone.
When “Error” is displayed on the screen of the smartphone, oper-
ate according to the procedure below.

Procedure:
1.  Tap the “Write” on the screen of the smartphone to write of the 

NFC tag data again.

2.  When “Error” is displayed on the screen of the smartphone 

again, tap the “Read” on the screen of the smartphone.

3.  Check that “MODE” on the screen of the smartphone is not 

“00 00 (Read-only)”.

4.  When “MODE” on the screen of the smartphone is “00 00 

(Read-only)”, execute the writing of the NFC tag data again 
after replacing the knob (VOL) (SV) assy.

 

(When “MODE” on the screen of the smartphone is “00 00 
(Read-only)”, the writing of the NFC tag data cannot execute)