STR-DA5700ES - Sony Audio Service Manual (repair manual). Page 6

NOTE  OF  REPLACING  THE  IC2239  ON  THE  D-AUDIO 
BOARD  AND  THE  COMPLETE  D-AUDIO  BOARD 
(AEP and UK models only)
When this unit is connected with PC, this unit is recognized as a 
USB audio device on PC. At this time, the manufacture maker’s 
information, etc. (USB descriptor) are transmitted to PC from this 
unit. The USB descriptor is stored in the IC2239 on the D-AUDIO 
board, and it is written in at the factory.
When the IC2239 on the D-AUDIO board or the complete D-AU-
DIO board are exchanged, do the following work.

1. Preparation
Prepare the following before beginning work.

• 

Windows PC (Windows XP or Vista)

• 

USB cable (A type plug to B type plug)

 
• 

Writing utility software (.exe fi le)

• 

USB descriptor defi nition fi le (.txt fi le)

Note: Confi rm the method of obtaining the writing utility software and 

USB descriptor defi nition fi le to each service headquarters.

2. Writing method
Procedure:
1.  Assemble to this unit the D-AUDIO board to which exchange 

of the IC2239 or D-AUDIO board exchange for the new.

2.  Connect PC and this set with USB cable.

3.  Press the [\/1] button on this unit to turn on the main power.
 

(It is not necessary to wait for memory clearing)

4. Run 

the 

writing utility software on PC.

5.  Click the “Read From File” button of the writing utility soft-

ware on PC and open the USB descriptor defi nition fi le.

6.  Click the “Save To EEPROM” button.

7.  Click the “Write” button.

8.  After “Save Data To EEPROM” window disappears, wait for 

about 2 seconds.

9.  After about 2 seconds, the writing of the USB descriptor to the 

IC2239 on the D-AUDIO board is completed.

3. Checking method
Procedure:
1.  Open the Device Manager of windows on PC.
2.  Expand the “Sound, video and game controllers”, and right-

click on the “AV RECEIVER”, “AV AMPLIFIER” or “USB 
Audio Device” and select the “Properties”.

3.  Click the “Details” tab, and select the “Hardware Ids” from pull-

down list on Property. Check that the part surrounded by the 
dotted line of the following fi gure is “VID_054C&PID_05C1”.

Property

Value

AV RECEIVER

Hardware Ids

USB\VID_054C&PID_05C1&REV_0001&MI_01
USB\VID_054C&PID_05C1&MI_01

4.  The checking was completed.

CAPACITOR  ELECTRICAL  DISCHARGE  PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitors (C905 on 
the ACDC board) to discharge the capacitors (C905 on the ACD-
Cboard).

:/2 W