MHC-V3, MHC-V4D - Sony Audio Service Manual (repair manual). Page 5

NOTICE  OF  BOARD  VERSION  CHECK  (MHC-V4D)
ARAGON board and DAMP board is synchronised. When any of 
the mounted board replacement is necessary, order the version of 
mounted ARAGON board (Suffi x-12) and DAMP board (Suffi x-12 
or 13).

NOTE  OF  REPLACING  THE  IC001,  IC002,  IC105,  IC106,  
IC301  (V4D)  AND  IC302  (V4D)  ON  THE  ARAGON  
BOARD
IC001, IC002, IC105, IC106, IC301 (V4D) and IC302 (V4D) on 
the ARAGON board cannot exchange with single. When these 
parts on the ARAGON board are damaged, exchange the entire 
mounted board.

NOTE  OF  REPLACING  THE  IC3002  ON THE  TUNER  
BOARD
IC3002 on the TUNER board cannot exchange with single. When 
this part on the TUNER board is damaged, exchange the entire 
mounted board.

NOTE  OF  REPLACEMENT  OF  THE  MS-476  BOARD
When the MS-476 board is defective, exchange the entire 
LOADING COMPLETE ASSY (T).

RELEASING  THE  DISC  TRAY  LOCK
The disc tray lock function for the antitheft of an demonstration 
disc in the store is equipped.

Releasing Procedure:
1. Press 

[

\/1

] button to turn the power on.

2.  Press the [FUNCTION] button until the message “CD 

FUNCTION” (V3) or “DVDCD” (V4D) is displayed.

3. Press the [

x

]

*1

 / [X]

*2 

button and [REC TO USB] button 

simultaneously and hold down for around 5 seconds.

4.  The message “UNLOCKED” is displayed and the disc tray is 

unlocked.

Note: When 

“

LOCKED

”

 is displayed, the slot lock is not released by 

turning power on/off with the

 [

\/1

]

 button.

NOTE  OF  REPLACING  THE  IC1001  ON  THE  DAMP  
BOARD  AND  THE  COMPLETE  DAMP  BOARD
When IC1001 on the DAMP board and the complete DAMP board 
are replaced, it is necessary to spread the compound between parts 
and heat sink.

Part No.   

Description

7-300-009-67 

THERMAL COMPOUND (TIG2000)

Spread the compound referring to the fi gure below.

BLUETOOTH  MODULE  OR  RC-S801/A5 (WW)  BOARD
When the ARAGON board or BLUETOOTH module or 
RC-S801/A5 (WW) board are replaced, please execute the below 
service mode.

1.  Press the [

\

/1

] button to turn the power on.

2. Place the Bluetooth device within 1 meter (3 feet) from the 

system.

3.  Press BLUETOOTH on the unit to select Bluetooth function. 

“BT AUDIO” appears in the display panel.

4.  Hold down BLUETOOTH on the unit for 2 seconds or more.
 “PAIRING” 

fl ashes in the display panel.

5.  Perform the pairing procedure on the Bluetooth device.
6.  Select the model number of the unit on the display of the 

Bluetooth device.

 

For example, select “SONY : MHC-V3/MHC-V4D”. If 
passkey is required on the Bluetooth device, enter “0000”.

7. Perform 

the 

Bluetooth connection on the Bluetooth device.

8.  When pairing is completed and the Bluetooth connection is 

established, the Bluetooth device name appears in the display 
panel.

9.  To cancel pairing operation, hold down BLUETOOTH on the 

unit for 2 seconds or more until “BT AUDIO” appears in the 
display panel.

Note: The operation in this mode must use a NFC-compatible smartphone 

(Smartphones with a built-in NFC function [OS: Android 2.3.3 or 
later, excluding Android 3.x])

1.  Press the [

\

/1

] button to turn the power on.

2.  Download and install the app “NFC Easy Connect”.
 

Download the free Android app from Google Play by searching 
for “NFC Easy Connect”.

3.  Start the app “NFC Easy Connect” on the smartphone.
 

Make sure that the application screen is displayed.

4.  Touch the smartphone to the N-Mark on the system until the 

smartphone vibrates.

  Complete the connection by following the instructions 

displayed on the smartphone.

5.  When pairing is completed and the Bluetooth connection is 

established, the Bluetooth device name appears in the display 
panel.

*1

 V3 model

*2

 V4D model