NWZ-A726/A726B/A728/A728B/A729
3
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.
1.
SERVICING NOTES
............................................. 3
2. GENERAL
.................................................................. 5
3. DISASSEMBLY
3-1. Disassembly Flow .......................................................... 6
3-2. Cover (Rear), Rear Assy ................................................. 6
3-3. Battery ............................................................................. 7
3-4. MAIN Board ................................................................... 7
3-5. LCD Assy ........................................................................ 8
4.
TEST MODE
............................................................ 9
5. DIAGRAMS
5-1. Block Diagram - MAIN Section - ................................... 17
5-2. Block
Diagram
- PANEL, POWER SUPPLY Section - ........................... 18
5-3. Printed Wiring Board - MAIN Board (Side A) - ............ 20
5-4. Printed Wiring Board - MAIN Board (Side B) - ............ 21
5-5. Schematic Diagram - MAIN Board (1/6) - ..................... 22
5-6. Schematic Diagram - MAIN Board (2/6) - ..................... 23
5-7. Schematic Diagram - MAIN Board (3/6) - ..................... 24
5-8. Schematic Diagram - MAIN Board (4/6) - ..................... 25
5-9. Schematic Diagram - MAIN Board (5/6) - ..................... 26
5-10. Schematic Diagram - MAIN Board (6/6) - ..................... 27
5-11. Schematic Diagram - SW Board (1/2) - .......................... 28
5-12. Schematic Diagram - SW Board (2/2) - .......................... 29
5-13. Printed Wiring Board - SW Board - ................................ 30
6.
EXPLODED VIEWS
6-1. Cover (Rear) Section ...................................................... 42
6-2. Rear
Assy
Section
........................................................... 43
6-3. MAIN Board Section ...................................................... 44
6-4. Front
Section
................................................................... 45
7.
ELECTRICAL PARTS LIST
.............................. 46
TABLE OF CONTENTS
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)
: LEAD FREE MARK
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.
NOTE THE CN601, CN602, IC301, IC302, IC305, IC501,
IC503, IC508, IC509, IC601, IC602, IC701, IC751, IC752,
IC901 AND IC902 ON THE MAIN BOARD REPLAC-
ING
CN601, CN602, IC301, IC302, IC305, IC501, IC503, IC508,
IC509, IC601, IC602, IC701, IC751, IC752, IC901 and IC902
on the MAIN board cannot exchange with single. When CN601,
CN602, IC301, IC302, IC305, IC501, IC503, IC508, IC509,
IC601, IC602, IC701, IC751, IC752, IC901 and IC902 on the
MAIN board are damaged, exchange the entire mounted board.
NOTE THE CN801, CN881 AND IC801 ON THE SW
BOARD REPLACING
CN801, CN881 and IC801 on the SW board cannot exchange with
single. When CN801, CN881 and IC801 on the SW board are dam-
aged, exchange the entire mounted board.
SECTION 1
SERVICING NOTES
System Requ
i
rements
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 / Windows Vista Home Premium
/ Windows Vista Business / Windows Vista Ultimate
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 7.2, 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.).
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
