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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).

 

 

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 [

 

DSPL 

MENU] button.

 

 

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

 

 When pressing the [  DSPL MENU] 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.

5.  Input the Bluetooth Local Name (BL_NAME).
 

(Input the “Sony Car Audio” with the keyboard on the smart-
phone, or tap the “List” on the screen of the smartphone and 
select the “Sony Car Audio”)

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

Sony Car Audio

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

that unchecked the box “Read-only”.

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Sony Car Audio

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.

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

phone, refer to “3. Error Display” on the page 10.

– Continued on next page –

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.

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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.

 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)

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)

4.  Check Method of the NFC Tag Data
Check the NFC tag data according to the procedure below.

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 18 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).

 

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 [

 

DSPL 

MENU] button.

 

 

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

 When pressing the [  DSPL MENU] button again, the destina-

tion 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 “Read” on the screen of the smartphone.

5.  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)”.

6.  End the NFCtagWriter application on the smartphone.

AFFIXING  OF  LABEL (SERIAL  NUMBER)
When the front panel (SV) (assy) is replaced, it is necessary to af-
fi x the label (serial number).
2 labels (serial number) are included with a new front panel (SV) 
(assy). Affi x 1 label to the rear side of the front panel (SV) (assy). 
Affi x the other one to the bottom side of main unit.
Be sure to perform this procedure, as Bluetooth will not operate 
correctly if the serial number of the front panel (SV) (assy) and 
main unit do not match.
Also, since the serial number has changed, print page 13 and hand 
the tear-off with the product to the customer when returning the 
product after repairs are complete.

5.  The Factor that One Touch Connection is Impossible 
The four following factors are considered as the factor that one touch connection is impossible. 
Guess and check the defective factor by each checking result.

Note: The four following factors are examples.

1 BT module defect

NG

―

NG

NG

2

Knob (VOL) (SV) 
assy defect

OK

NG

OK

NG

3

NFC tag data 
writing failure

OK

NG

OK

NG

4 Smartphone

OK

OK

OK

NG

Check the version of the NFC tag data writing application 
(NFCtagWriter application) for the servicing according to the 
procedure below.

Procedure:
1.  Start the NFCtagWriter application on the smartphone.
2.  Tap the “ 

 ” (menu button) or “   ” of the screen of the smart-

phone, then tap the “About” that is displayed on the screen of 
the smartphone.

3.  Check that version of the NFC tag data writing application for 

the servicing is displayed on the screen of the smartphone.