MEX-N4000BE, MEX-N4000BT, MEX-N4050BT, MEX-N4070BT - Sony Car Audio Service Manual (repair manual). Page 10

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MEX-N4000BE/N4000BT/N4050BT/N4070BT
10
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 6)
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.
48D2242F241A
Sony Car Audio
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 6)
3. Error 
Display
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)
Ver. 1.2
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