NWZ-A844, NWZ-A845, NWZ-A846, NWZ-A847 - Sony Audio Service Manual (repair manual). Page 3

  .............................................   3

2-1.   Disassembly Flow ...........................................................   5
2-2.   Rear Assy ........................................................................   5
2-3.   Support (PWB) ...............................................................   6
2-4.   SVX Battery Assy (BAT1) ..............................................   6
2-5.   MAIN Board ...................................................................   7
2-6.   SVX HP Jack Assy (HPJ1) .............................................   8
2-7.   Main Chassis Block, SVX VOL Key FPC .....................   8
2-8.   Sheet Key (7Key), Front Panel Assy ..............................   9

TEST  MODE 

 ............................................................   10

4-1.  Rear Panel Section ..........................................................   20
4-2. Main 

Section 

...................................................................  21

4-3.  Front Panel Section .........................................................   22

  .......................................................   23

FLEXIBLE  CIRCUIT  BOARD  REPAIRING
• 

Keep the temperature of soldering iron around 270 °C during 
repairing.

• 

Do not touch the soldering iron on the same conductor of the 
circuit board (within 3 times).

• 

Be careful not to apply force on the conductor when soldering 
or unsoldering.

ABOUT  THE  REPAIRING  OF  BOARD
When electric parts installed by this machine are defective, replace 
the entire board.
Individual electrical parts that the mount is done cannot be ex-
changed.

ABOUT  THE  HANDLING  OF  THE  SVX  BATTERY  ASSY 
(BAT1)
When the SVX battery assy (BAT1) is removed, insulate the end 
of wire by a tape etc. to prevent short-circuited of the wire part of 
SVX battery assy (BAT1).

t  Computer  

IBM PC/AT or compatible computer preinstalled with the following Windows operating 
systems

*1

: 

Windows XP Home Edition (Service Pack 2 or later) / Windows XP Professional 
(Service Pack 2 or later) / Windows Vista Home Basic (Service Pack 1 or later) / 
Windows Vista Home Premium (Service Pack 1 or later) / Windows Vista Business 
(Service Pack 1 or later) / Windows Vista Ultimate (Service Pack 1 or later) / Windows 7 
Home Basic / Windows 7 Home Premium / Windows 7 Professional / Windows 7 
Ultimate 
Supported 64 bit version OS for Windows Vista and Windows 7. 
Not supported by OSs other than above. 

*1

 Excluding OS Versions not supported by Microsoft.

t  CPU: Pentium III 450 MHz or higher for Windows XP, Pentium III 800 MHz or higher 

for Windows Vista, Pentium III 1 GHz or higher for Windows 7

t  RAM: 256 MB or more for Windows XP, 512 MB or more for Windows Vista, 1 GB or 

more for Windows 7 32-bit version, 2 GB or more for Windows 7 64-bit version

t  Hard Disk Drive: 400 MB or more of available space
t  Display:

–  Screen Resolution: 800 × 600 pixels (or higher) (recommended 1,024 × 768 or higher)
–  Colors: 8 bit or higher (16 bit recommended)

t  CD-ROM drive (supporting Digital Music CD playback capabilities using WDM)
t  Sound board
t  USB connector (Hi-Speed USB is recommended)
t  Internet Explorer 7 or later and Windows Media Player 11 or later are required.
t  Broadband Internet connection is required to use Electronic Music Distribution (EMD) 

or to visit the web site.

We do not guarantee operation for all computers even if they meet the above System 
Requirements.

Not supported by the following environments:

–  Personally constructed computers or operating systems
–  An environment that is an upgrade of the original manufacturer-installed operating 

system

– Multi-boot environment
– Multi-monitor environment
– Macintosh

CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.