NWZ-S636F, NWZ-S636FK, NWZ-S638F, NWZ-S639F, NWZ-S736F, NWZ-S738F, NWZ-S739F - Sony Audio Service Manual (repair manual). Page 3

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

  ..................................................................   6

3-1.   Disassembly Flow ...........................................................   7
3-2.   Rear Assy ........................................................................   7
3-3.   MAIN Board ...................................................................   8
3-4.   Battery Assy ....................................................................   8
3-5.   Key Flexible Print Board, LCD Assy .............................   9
3-6.   SW/AU Board .................................................................   9

TEST  MODE 

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

5-1. Schematic 

Diagram 

.........................................................  19

5-2. Printed 

Wiring 

Boards 

....................................................  20

6-1.  Case (Rear) Section ........................................................   21
6-2. LCD 

Section 

...................................................................  22

6-3.  PC Board Section ............................................................   23

  ..............................   24

Accessories are given in the last of the electrical parts list.

NOTES  ON  CHIP  COMPONENT  REPLACEMENT
• 

Never reuse a disconnected chip component.

• 

Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

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.

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

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution:  Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if 

the heated tip is applied for too long, so be careful!

• Strong 

viscosity

 

Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

• 

Usable with ordinary solder

 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.

 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)

  Not supported by 64 bit version OS.

  Not supported by OSs other than above. 

*

1

 Excluding OS Versions not supported by Microsoft.

 CPU: Pentium 4 1.0 GHz or higher

 RAM: 512 MB or more

 Hard Disk drive: 380 MB or more of available space

 Display: 

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

 CD-ROM drive (supporting Digital Music CD playback capabilities using WDM) 

To create original CDs, a CD-R/RW drive is required.

 Sound board

 USB port (Hi-Speed USB is recommended)

 Microsoft .NET Framework 2.0 or 3.0, QuickTime 7.3, Internet Explorer 6.0 or 7.0, 

Windows Media Player 10 or 11 (Windows Media Player 11 recommended. Some 
computers that already have Windows Media Player 10 installed may encounter file 
limitation (AAC, video files, etc.) that can be transferred by dragging and dropping.), 
and DirectX 9.0 are required.

 Adobe Flash Player 8 or higher needs to be installed.

 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