Sony Walkman NWZ-A726 User manual

SERVICE MANUAL
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
SPECIFICATIONS
DIGITAL MEDIA PLAYER
9-889-029-01
2008B05-1
© 2008.02
US Model
NWZ-A726/A726B/A728/A728B/A729
Canadian Model
NWZ-A726/A728
E Model
Australian Model
Tourist Model
East European Model
NWZ-A726/A728/A729
Ver. 1.0 2008.02
NWZ-A726/A726B/A728/
A728B/A729
Photo: NWZ-A728
ATRAC is trademark of Sony Corporation.
“WALKMAN” and “WALKMAN” logo are registered trademarks of Sony
Corporation.
and are trademarks of Sony Corporation.
Microsoft, Windows, Windows Vista and Windows Media are trademarks or
registered trademarks of Microsoft Corporation in the United States and/or
other countries.
Adobe, Adobe Reader and Adobe Flash Player are trademarks or registered
trademarks of Adobe Systems Incorporated in the United States and/or other
countries.
MPEG Layer-3 audio coding technology and patents licensed from
Fraunhofer IIS and Thomson.
IBM and PC/AT are registered trademarks of International Business
Machines Corporation.
Macintosh is a trademark of Apple Inc.
QuickTime and the QuickTime logo are trademarks or registered trademarks
of Apple Inc., used under license therefrom.
Pentium is a trademark or a registered trademark of Intel Corporation.
This software is based in part on the work of the Independent JPEG Group.
THIS PRODUCT IS LICENSED UNDER THE MPEG-4 VISUAL PATENT
PORTFOLIO LICENSE FOR THE PERSONAL AND NON-COMMERCIAL
USE OF A CONSUMER FOR
(i) ENCODING VIDEO IN COMPLIANCE WITH THE MPEG-4 VISUAL
STANDARD (“MPEG-4 VIDEO”) AND/OR
(ii) DECODING MPEG-4 VIDEO THAT WAS ENCODED BY A
CONSUMER ENGAGED IN A PERSONAL AND NON-COMMERCIAL
ACTIVITY AND/OR WAS OBTAINED FROM A VIDEO PROVIDER
LICENSED BY MPEG LA TO PROVIDE MPEG-4 VIDEO.
NO LICENSE IS GRANTED OR SHALL BE IMPLIED FOR ANY OTHER
USE. ADDITIONAL INFORMATION INCLUDING THAT RELATING TO
PROMOTIONAL, INTERNAL AND COMMERCIAL USES AND
LICENSING MAY BE OBTAINED FROM MPEG LA, LLC. SEE
HTTP://WWW.MPEGLA.COM
THIS PRODUCT IS LICENSED UNDER THE AVC PATENT PORTFOLIO
LICENSE FOR THE PERSONAL AND NON-COMMERCIAL USE OF A
CONSUMER TO
(i) ENCODE VIDEO IN COMPLIANCE WITH THE AVC STANDARD
(“AVC VIDEO”) AND/OR
(ii) DECODE AVC VIDEO THAT WAS ENCODED BY A CONSUMER
ENGAGED IN A PERSONAL AND
NON-COMMERCIAL ACTIVITY AND/OR WAS OBTAINED FROM A
VIDEO PROVIDER LICENSED TO PROVIDE AVC VIDEO. NO LICENSE
IS GRANTED OR SHALL BE IMPLIED FOR ANY OTHER USE.
ADDITIONAL INFORMATION MAY BE OBTAINED FROM MPEG LA,
L.L.C. SEE HTTP://MPEGLA.COM
US and foreign patents licensed from Dolby Laboratories.
All other trademarks and registered trademarks are trademarks or registered
trademarks of their respective holders. In this manual, TM and ® marks are not
specified.
This product is protected by certain intellectual property rights of Microsoft
Corporation. Use or distribution of such technology outside of this product is
prohibited without a license from Microsoft or an authorized Microsoft
subsidiary.
Content providers are using the digital rights management technology for
Windows Media contained in this device (“WM-DRM”) to protect the integrity
of their content (“Secure Content”) so that their intellectual property, including
copyright, in such content is not misappropriated.
This device uses WM-DRM software to play Secure Content (“WM-DRM
Software”). If the security of the WM-DRM Software in this device has been
compromised, owners of Secure Content (“Secure Content Owners”) may
request that Microsoft revoke the WM-DRM Software’s right to acquire new
licenses to copy, display and/or play Secure Content. Revocation does not alter
the WM-DRM Software’s ability to play unprotected content. A list of revoked
WM-DRM Software is sent to your device whenever you download a license
for Secure Content from the Internet or from a PC. Microsoft may, in
conjunction with such license, also download revocation lists onto your device
on behalf of Secure Content Owners.
Program ©2008 Sony Corporation
Documentation ©2008 Sony Corporation
Supported file format
Music
File format MP3(MPEG-1 Layer3) file format, ASF file format, MP4 file format, Wave-Riff file
format
File extension MP3 (.mp3), WMA*1(.wma), AAC-LC*2(.mp4, .m4a, .3gp), Linear PCM (.wav)
Codec MP3 Bit rate: 32 to 320 kbps (Supports variable bit rate (VBR))
Sampling frequency*3: 32, 44.1, 48 kHz
WMA*1Bit rate: 32 to 192 kbps (Supports variable bit rate (VBR))
Sampling frequency*3: 44.1 kHz
AAC-LC*2Bit rate: 16 to 320 kbps (Supports variable bit rate (VBR))*4
Sampling frequency*3: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz
Linear PCM Bit rate: 1,411 kbps
Sampling frequency*3: 44.1 kHz
Video
File format MP4 file format, “Memory Stick” video format
File extension .mp4, .m4v
Codec Video AVC
(H.264/AVC)
Profile: Baseline Profile
Level: Max. 1.3
Bit rate: Max. 768 kbps
MPEG-4 Profile: Simple Profile
Bit rate: Max. 2,500 kbps
Frame rate: Max. 30 fps
Resolution: Max. QVGA (320 × 240)
Audio AAC-LC Channel number: Max. 2 channels
Sampling frequency*3: 24, 32, 44.1, 48 kHz
Bit rate: Max. 288 kbps per 1 channel
File size Max. 2 GB
The number of files Max. 1,000
Photo*5
File format Compatible with DCF 2.0/Exif 2.21file format
File extension .jpg
Codec Profile: Baseline Profile
Number of pixels: Max. 4,000 × 4,000 pixels (16,000,000 pixels)
The number of files Max. 10,000
*1WM-DRM 10 files are compatible.
*2Copyright protected AAC-LC files cannot be played back.
*3Sampling frequency may not correspond to all encoders.
*4Non-standard bit rates or non-guaranteed bit rates are included depending on the
sampling frequency.
*5Some photo files cannot be played back, depending on their file formats.
– Continued on next page –

NWZ-A726/A726B/A728/A728B/A729
2
Maximum recordable number of songs and time (Approx.)
The approximate times are based on the case in which you transfer or record only 4
minutes songs (not including videos and photos) in the MP3 format. Other playable audio
file format song numbers and times may differ from MP3 format.
NWZ-A726 NWZ-A728
Bit rate Songs Time Songs Time
48 kbps 2,450 163 hr. 20 min. 5,050 336 hr. 40 min.
64 kbps 1,850 123 hr. 20 min. 3,750 250 hr. 00 min.
128 kbps 925 61 hr. 40 min. 1,850 123 hr. 20 min.
256 kbps 460 30 hr. 40 min. 945 63 hr. 00 min.
320 kbps 370 24 hr. 40 min. 755 50 hr. 20 min.
NWZ-A729
Bit rate Songs Time
48 kbps 10,200 680 hr. 00 min.
64 kbps 7,650 510 hr. 00 min.
128 kbps 3,800 253 hr. 20 min.
256 kbps 1,900 126 hr. 40 min.
320 kbps 1,500 100 hr. 00 min.
NWZ-A726B NWZ-A728B
Bit rate Songs Time Songs Time
48 kbps 2,450 163 hr. 20 min. 5,050 336 hr. 40 min.
64 kbps 1,850 123 hr. 20 min. 3,750 250 hr. 00 min.
128 kbps 925 61 hr. 40 min. 1,850 123 hr. 20 min.
256 kbps 460 30 hr. 40 min. 945 63 hr. 00 min.
320 kbps 370 24 hr. 40 min. 755 50 hr. 20 min.
Maximum recordable time of videos (Approx.)
The approximate recordable times are estimated in the case where only videos are
transferred. The time may differ, depending on the conditions under which the player is
used.
NWZ-A726 NWZ-A728 NWZ-A729
Bit rate Time Time Time
Video Format: 384 kbps 15 hr. 00 min. 30 hr. 40 min. 62 hr. 00 min.
Audio Format: 128 kbps
Video Format: 768 kbps 8 hr. 30 min. 17 hr. 30 min. 35 hr. 30 min.
Audio Format: 128 kbps
NWZ-A726B NWZ-A728B
Bit rate Time Time
Video Format: 384 kbps 15 hr. 00 min. 30 hr. 40 min.
Audio Format: 128 kbps
Video Format: 768 kbps 8 hr. 30 min. 17 hr. 30 min.
Audio Format: 128 kbps
Maximum recordable number of photos that can be transferred (Approx.)
Max. 10,000
Recordable number of photos may be less depending on file sizes.
Capacity (User available capacity)*1
NWZ-A726: 4 GB (Approx. 3.57 GB = 3,840,638,976 bytes)
NWZ-A728: 8 GB (Approx. 7.30 GB = 7,840,956,416 bytes)
NWZ-A729: 16 GB (Approx. 14.7 GB = 15,841,820,672 bytes)
NWZ-A726B: 4 GB (Approx. 3.57 GB = 3,840,573,440 bytes)
NWZ-A728B: 8 GB (Approx. 7.30 GB = 7,840,890,880 bytes)
*1Available storage capacity of the player may vary.
A portion of the memory is used for data management functions.
Output (headphones)
Frequency response
20 to 20,000 Hz (when playing data file, single signal measurement)
Interface
Headphone: Stereo mini-jack
WM-PORT (multiple connecting terminal): 22 pins
Hi-Speed USB (USB 2.0 compliant)
Operating temperature
5 °C to 35 °C (41 °F to 95 °F)
Power source
• Built-in rechargeable lithium-ion battery
• USB power (from a computer via the supplied USB cable)
Charging time
USB-based charging
Approx. 3 hours (full charge), Approx.1.5 hours (approx. 80 %)
Battery life (continuous playback)
By setting as follows, a longer battery life can be expected.
The times below are approximated when “New Song Pop Up”, “Clear Stereo”, “DSEE(Sound
Enhancer)”, “Dynamic Normalizer”, “Equalizer” and “VPT(Surround)” are deactivated,
and “Screensaver” is set to “Blank.”
Furthermore, for videos, the time approximated when the brightness of the screen is set to
“3.”
NWZ-A726/A726B/A728/A728B/
A729
Music
Playback at MP3 128 kbps Approximately 36 hours
Playback at WMA 128 kbps Approximately 35.5 hours
Playback at AAC-LC 128 kbps Approximately 33.5 hours
Playback at Linear PCM 1411 kbps Approximately 34.5 hours
Video
Playback at MPEG-4 384 kbps Approximately 10 hours
Playback at MPEG-4 768 kbps Approximately 9 hours
Playback at AVC 384 kbps Approximately 8 hours
Playback at AVC 768 kbps Approximately 8 hours
Display
2.4-inch, TFT color display with white LED-backlight, QVGA (240 × 320 pixels), 262,144
colors
Dimensions (w/h/d, projecting parts not included)
50.2 × 93.6 × 9.3 mm (2 × 3 3/4× 3/8inches)
Dimension (w/h/d)
51.0 × 93.9 × 9.3 mm (2 1/8× 3 3/4× 3/8inches)
Mass
Approx. 58 g (Approx. 2.1 oz)
Supplied Accessories
Headphones (1)
USB cable (1)
Earbuds (Size S,L) (1)
Attachment (1)
Use when connecting the player to the optional cradle, etc.
Stand (1)
CD-ROM*1*2(1)
– BestBuy Digital Music Store (NWZ-A726B/A728B)
– MP3 Conversion Tool
– Media Manager for WALKMAN
– Windows Media Player 11
– Operation Guide (PDF file)
Quick Start Guide (1)
*1Do not attempt to play this CD-ROM in an audio CD player.
*2Depending on the country/region in which you have purchased the player, the
bundled software may be different.
Design and specifications are subject to change without notice.

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 flow)
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 Requirements
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.
*1Excluding 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

NWZ-A726/A726B/A728/A728B/A729
4
NOTE THE MAIN BOARD REPLACING
When the MAIN board is replaced, format it according to the fol-
lowing.
COLOR VARIATION
Model Destination Color
Black White Pink Silver Gold
NWZ-A726 US zz
US (CircuitCity) zz
CND zzz
E, AUS, JE zz z
MX3 zz
EE zzzz
NWZ-A726B US (BestBuy) zz
NWZ-A728 US zz
US (CircuitCity) z
CND zz
E, AUS, JE zzz
MX3 z
EE zzzz
NWZ-A728B US (BestBuy) zz
NWZ-A729 US z
E, AUS, JE z
EE z
Formatting Memory (Format)
You can format the built-in flash memory of the player.
If the memory is formatted, all data and settings will be erased. Be sure to
verify the data stored in memory prior to formatting and export any important
data to the hard disk of your computer.
Settings 5-way button
BACK/HOME
button
Note
This function is only available in the pause mode.
Press and hold the BACK/HOME button in the pause mode until the
Home menu appears.
Press the ///button to select (Settings), and then press
the button to conrm.
Press the ///button to select “Common Settings,” and then
press the button to conrm.
The list of “Common Settings” options appears.
Press the ///button to select “Format,” and then press the
button to conrm.
“All data including songs will be deleted. Proceed?” appears.
Press the /button to select “Yes,” and then press the button
to conrm.
“All data will be deleted. Proceed?” appears.
Press the /button to select “Yes,” and then press the button
to conrm.
While the memory is being formatted, an animated display appears.
When initialization finishes, “Memory formatted.” appears.
Tocancel the operation
Select “No” in step or and press the button to confirm. You can also
cancel the operation by pressing the BACK/HOME button in step or .
Note
Do not format the built-in flash memory using software or Windows Explorer.
• Abbreviation
AUS : Australian model
CND : Canadian model
EE : East European model
JE : Tourist model
MX3 : Argentina, Brazilian, Chilean, Colombian, Ecuadorean, Panamanian, Peruvian and Venezuelan models

NWZ-A726/A726B/A728/A728B/A729
5
SECTION 2
GENERAL
Parts and Controls
Front
BACK/HOME button*1
Press to go up one list screen level, or
to return to the previous menu.
Press and hold the BACK/HOME
button to display the Home menu .
Headphone jack
For connecting the headphones.
Insert the jack pin until it clicks into
place. If the headphones are
connected improperly, the sound
from the headphones may not sound
right.
WM-PORT jack
Use this jack to connect the supplied
USB cable, or optional peripheral
devices, such as supported
accessories for the WM-PORT.
5-way button*2
Starts playback and enables
navigation of the player’s on-screen
menus.
Display
The display may vary, depending on
functions.
VOL +*2/– button
Adjusts the volume.
HOLD switch
You can protect the player against
accidental operation by using the
HOLD switch when carrying it. By
sliding the HOLD switch to the
direction of the arrow , all
operation buttons are disabled. If you
slide the HOLD switch to the
opposite position, the HOLD
function is released.
OPTION/PWR OFF button*1
Displays the option menu .
If you press and hold the OPTION/
PWR OFF button, screen turns off
and the player enters standby mode.
If you press any button while the
player is in standby mode, the “Now
Playing” screen, etc., appears and the
player is ready for operation.
Furthermore, if you leave the player
in standby mode for about a day, the
player turns completely off
automatically. If you press any button
when the player is turned off, the
start up screen appears first, then the
“Now Playing” screen appears.
Note
• The player consumes battery power
very slightly even when it is in standby
mode. Therefore, the player might
turn completely off in a short time,
depending on the power remaining in
the battery.
Strap hole
Used to attach a strap (sold
separately). You can attach the
supplied stand and a strap at the same
time.
*1Functions marked with on the
player are activated if you press and hold
the corresponding buttons.
*2There are tactile dots. Use them to help
with button operations.
Rear
RESET button
Resets the player when you press the
RESET button with a small pin, etc. .
Accessory hole (type I)
Used to attach the supplied stand or
the optional accessories.
Using the supplied stand
You can stand up the player using the
supplied stand.
Notes
•When standing the player with the
stand, be careful not to press down or
knock the player.
•Stand up the player horizontally as
shown. Do not stand it up vertically.
This section is extracted
from instruction manual.

NWZ-A726/A726B/A728/A728B/A729
6
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
Note: Follow the disassembly procedure in the numerical order given.
3-2. COVER (REAR), REAR ASSY
SET
3-2. COVER (REAR),
REAR ASSY
(Page 6)
3-3. BATTERY
(Page 7)
3-4. MAIN BOARD
(Page 7)
3-5. LCD ASSY
(Page 8)
two screws (M1.4)
two ornamental screws
screw
(M1.4)
two claws
rear assy
two
claws
lid (ACC)
claw
claw

cover (rear)

NWZ-A726/A726B/A728/A728B/A729
7
3-3. BATTERY
Note: This illustlation sees the battery assy from back.
3-4. MAIN BOARD
Note: This illustration sees the MAIN board from the back.
battery
adhesive sheet (BATT)

BATT wire sheet
connector
(CN901)
battery connector
lead wire
(red)
lead wire
(black)
spacer (line in)
Note 2: When removing battery,
don't remove by the impossible power.
Note 3: Adhesive sheet (BATT) cannot re-used.
Please replace to brand-new part ones
adhesive sheet (BATT) is removed.
Note 1: When installing battery connector,
please be careful about the color
of the lead wires as shown in a figure
and install battery connector.
screw
(B1.4)
spacer (line in)
claw
BATT wire sheet
R connector (CN601)
connector (board to board)
connector
(board to board)
spacer (line in)
connector (CN901)
HP flexible
print board
(CN301)
RI MAIN board
RB cushion
PWB
sheet key (CN602)
escutcheon (CN)
RT spacer (PWB-S)
RE sheet (WM-P)
RG cushion (WM-P)
RH cushion PWB
RE sheet (WM-P)
battery connector
lead wire
(red)
lead wire
(black)
Note 1: When installing battery connector,
please be careful about the color
of the lead wires as shown in a figure
and install battery connector.
Note 2: Please install or
remove connector
(board to board)
vertically.

NWZ-A726/A726B/A728/A728B/A729
8
3-5. LCD ASSY
two screws
(M1.4)
two spacers
(WM-P)
two claws
two claws
SW board
LCD flexible board
(CN801)
sheet (LCD-B)
two screws
(B1.4)
screw
(B1.4)
RE LCD assy
R Open the LCD assy
in the direction of the arrow.
waterproof jack
Remove the waterproof jack
in the direction of the arrow.
RB boss
RT Pull out the
LCD flexible board.
LCD flexible board
LCD assy

9
NWZ-A726/A726B/A728/A728B/A729
SECTION 4
TEST MODE
1. SETTING THE TEST MODE
Note: Perform the test mode in the state of 3.6 V or more in the battery
voltage.
Setting method:
1. Turn the power on.
2. Press the [BACK] key for 1.5 seconds or more, the home menu
is displayed.
3. Slide the [HOLD] key to set the hold on.
4. While pressing the [OPTION] key, press the key as following
order.
[
v] →[v] →[V] →[V] →[B] →[b] →[v] →[V] →[v] →
[V] →[B] →[u]
5. The set reboots when the [HOLD] key is slided to set the hold
off, and the color bar is displayed in the liquid crystal display.
6. Enter the test mode when the [BACK] key is pressed in the
state of step 5.
Note: The destination setting and sound pressure regulation setting can-
not be executed by this test mode.
2. RELEASING THE TEST MODE
1. Display the major item selection screen.
2. Press the [v]/[V] key to select the “EXITTEST”, and press the
[B] key to select the “SURE ?”.
3. Press the [u] key, turn the power off and release the test
mode.
3. CONFIGURATION OF THE TEST MODE
<> key
Major item Major item switching:
<>/<> key
<#"$,> key
Minor item
Finish
or
Result
Start
Automatic
V
<> key
<> key
#C
W7
Minor item switching:
<>/<> key
W7
4. OPERATION OF THE TEST MODE
4-1. Power
liquid crystal display
MPTAPP MENU
POWER VCHK
AUDIO ACHK
VIDEO DSVCHK
OTHER CHGCHK
CLESTE BATTCHK
DAC
SHUTDOWN
EXITTEST
4-1-1. Power supply voltage check
This mode is used in case power supply voltage in the state where
all power supply lines are starting is checked.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “POWER”, and press the
[B] key to enter the minor item.
3. Press the [v]/[V] key to select the “VCHK”.
4. Press the [u] key, all power supply lines are started.
liquid crystal display
POWER VCHK
START
In this state, the power supply voltage of each power supply
line can be confirmed by measuring the voltage.
5. Press the [BACK] key, return to minor item selection screen.
4-1-2. Consumption current (audio playback) check
This mode is used in case consumption current (audio playback)
is checked in the state where “1 kHz 0 dBs L-ch/R-ch VOLUME:
15” audio signal is outputed.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “POWER”, and press the
[B] key to enter the minor item.
3. Press the [v]/[V] key to select the “ACHK”.
4. Press the [u] key, “1 kHz 0 dBs L-ch/R-ch VOLUE: 15”
audio signal is outputed.
liquid crystal display
POWER ACHK
1kHz 0dBs L/Rch
HPOUT [ VOL: 15 ]
START
5. In this state, each time the [OPTION] key is pressed, LCD
back light on/off switch is performed.
6. Press the [BACK] key, return to minor item selection screen.
Note: Information on the test mode must correspond in enough
security. When the leakage has been revealed by any
chance, the source of information is specified.

10
NWZ-A726/A726B/A728/A728B/A729
4-1-3. Standby current check
This mode is used in case standby current is checked.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “POWER”, and press the
[B] key to enter the minor item.
3. Press the [v]/[V] key to select the “DSVCHK”.
4. Press the [u] key, enter the state of the deep sleep.
5. Press the [BACK] key, release the state of the deep sleep.
liquid crystal display
POWER DSVCHK
OK
6. Press the [BACK] key, return to minor item selection screen.
4-1-4. Charge current check
This mode is used in case charge current is checked.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “POWER”, and press the
[B] key to enter the minor item.
3. Press the [v]/[V] key to select the “CHGCHK”.
4. Press the [u] key, the charge setting is displayed.
liquid crystal display
POWER CHGCHK
AC
AC
5. In this state, each time the [OPTION] key is pressed, the port
setting for the charge is changed as shown in the table below.
Port control
Display CHG_XCHGEN CHG_PEN1 CHG_PEN2
AC L H H
USB500 L H H
USB100 L H L
6. Press the [BACK] key, return to minor item selection screen.
4-1-5. Battery voltage detection check
This mode is used in case battery voltage is checked.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “POWER”, and press the
[B] key to enter the minor item.
3. Press the [v]/[V] key to select the “BATTCHK”.
4. Press the [u] key, the battery voltage is displayed.
When the battery voltage cannot be confirmed, “ERROR” is
displayed.
liquid crystal display
POWER BATTCHK
X.XXXV
X.XXXV: Battery voltage
6. Press the [BACK] key, return to minor item selection screen.
4-2. Audio
While playing the audio track, it's in a repeat state. If [BACK] key
is pressed, it's stopped.
Press the [VOL +] key to switch the HP/LINE.
liquid crystal display
MPTAPP MENU
POWER
AUDIO OUTPUT
VIDEO SN
OTHER F1
CLESTE F2
DAC SEPLR
SHUTDOWN SEPRL
EXITTEST MAXOUT
NMLZR
SPCHK

11
NWZ-A726/A726B/A728/A728B/A729
4-2-1. Output check
“1 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output-
ted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “OUTPUT”.
4. Press the [u] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 25”
audio signal is outputted.
liquid crystal display
AUDIO OUTPUT
1kHz 0dBs L/Rch
HPOUT [ VOL: 25 ]
START
5. Press the [BACK] key, return to minor item selection screen.
4-2-2. S/N check
“Infinity Zero VOLUME: 30” audio signal is outputted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “SN”.
4. Press the [u] key, “Infinity Zero VOLUME: 30” audio signal
is outputted.
liquid crystal display
AUDIO SN
Infinity Zero
HPOUT [ VOL: 30 ]
START
5. Press the [BACK] key, return to minor item selection screen.
4-2-3. Frequency characteristic 1 check
“20 Hz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output-
ted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “F1”.
4. Press the [u] key, “20 Hz 0 dBs L-ch/R-ch VOLUME: 25”
audio signal is outputted.
liquid crystal display
AUDIO F1
20Hz 0dBs L/Rch
HPOUT [ VOL: 25 ]
START
5. Press the [BACK] key, return to minor item selection screen.
4-2-4. Frequency characteristic 2 check
“20 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output-
ted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “F2”.
4. Press the [u] key, “20 kHz 0 dBs L-ch/R-ch VOLUME: 25”
audio signal is outputted.
liquid crystal display
AUDIO F2
20kHz 0dBs L/Rch
HPOUT [ VOL: 25 ]
START
5. Press the [BACK] key, return to minor item selection screen.

12
NWZ-A726/A726B/A728/A728B/A729
4-2-5. CH separation (L-ch) check
“1 kHz 0 dBs L-ch VOLUME: 25” audio signal is outputted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “SEPLR”.
4. Press the [u] key, “1 kHz 0 dBs L-ch VOLUME: 25” audio
signal is outputted.
liquid crystal display
AUDIO SEPLR
1kHz 0dBs Lch
HPOUT [ VOL: 25 ]
START
5. Press the [BACK] key, return to minor item selection screen.
4-2-6. CH separation (R-ch) check
“1 kHz 0 dBs R-ch VOLUME: 25” audio signal is outputted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “SEPRL”.
4. Press the [u] key, “1 kHz 0 dBs R-ch VOLUME: 25” audio
signal is outputted.
liquid crystal display
AUDIO SEPRL
1kHz 0dBs Rch
HPOUT [ VOL: 25 ]
START
5. Press the [BACK] key, return to minor item selection screen.
4-2-7. Maximum output check
“1 kHz 0 dBs L-ch/R-ch VOLUME: 30” (Headphone output when
AVLS operates: “1 kHz 0 dBs L-ch/R-ch VOLUME: 13”) audio
signal is outputted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “MAXOUT”.
4. Press the [u] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 30”
(Headphone output when AVLS operates: “1 kHz 0 dBs L-ch/
R-ch VOLUME: 13”) audio signal is outputted.
liquid crystal display
AUDIO MAXOUT
1kHz 0dBs L/Rch
HPOUT [ VOL: 30 ]
AVLS OFF
START
5. In this state, each time the [OPTION] key is pressed, AVLS
on/off switch is performed.
6. Press the [BACK] key, return to minor item selection screen.
4-2-8. Normalizer check
“1 kHz – 24 dBs L-ch/R-ch VOLUME: 30” audio signal is output-
ted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “NMLZR”.
4. Press the [u] key, “1 kHz – 24 dBs L-ch/R-ch VOLUME:
30” audio signal is outputted.
liquid crystal display
AUDIO NMLZR
1kHz –24dBs L/Rch
HPOUT [ VOL: 30 ]
START
5. Press the [BACK] key, return to minor item selection screen.

13
NWZ-A726/A726B/A728/A728B/A729
4-2-9. Sound pressure regulation level check
“1 kHz 0 dBs L-ch/R-ch VOLUME: 30” audio signal is output-
ted.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “AUDIO”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “SPCHK”.
4. Press the [u] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 30”
audio signal is outputted.
liquid crystal display
AUDIO SPCHK
1kHz 0dBs L/Rch
HPOUT [ VOL: 30 ]
START
5. Press the [BACK] key, return to minor item selection screen.
4-3. Video
liquid crystal display
MPTAPP MENU
POWER
AUDIO
VIDEO — LCD
OTHER
CLESTE
DAC
SHUTDOWN
EXITTEST
4-3-1. LCD display check
Liquid crystal display is checked.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “VIDEO”, and press the [B]
key to select the “LCD”.
3. Press the [u] key, all black is displayed on the liquid crystal
display.
4. In this state, each time the [OPTION] key is pressed, the screen
display changes in the following order.
All black (default) →All red →All green →All blue →All
white →Color bar →Maximum drawing size confirmation
→diagonal gradation (red) →diagonal gradation (green) →
diagonal gradation (blue) →diagonal gradation (white)
Maximum drawing size confirmation:
All blue (All sides are red) is displayed. Whether red in all
sides is seen is confirmed.
5. In this state, each time the [VOL –] key is pressed, LCD back
light brightness min/max/middle switch is performed.
6. Press the [BACK] key, return to minor item selection screen.
4-4. Other
liquid crystal display
MPTAPP MENU
POWER
AUDIO
VIDEO
OTHER CLOCK
CLESTE KEY
DAC KETYNUM
SHUTDOWN FORMAT
EXITTEST DEST
SPSET
FWVER
NCAPCHK
4-4-1. Clock check
The movement of an internal clock is confirmed.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “OTHER”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “CLOCK”.
4. Press the [u] key, date and time are displayed.
liquid crystal display
OTHER CLOCK
XX, XX XX XXXX
##:##:##.######
START
XX, XX XX XXXX : Date
##:##:##.###### : Time
“START” changes into “OK” if the movement of an internal
clock is confirmed.
5. Press the [BACK] key, return to minor item selection screen.

14
NWZ-A726/A726B/A728/A728B/A729
4-4-2. Key check
The operation of the key is confirmed.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “OTHER”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “KEY”.
4. Press the [u] key, all keys are displayed.
liquid crystal display
OTHER KEY
UP VOL+
REW PLAY FF VOL–
DOWN OPTION
HOLD BACK
START
5. The character corresponding to the key is selected every time
the key is pressed. “START” changes into “OK” if all keys are
pressed.
6. Slide the [HOLD] key from ON to OFF, return to minor item
selection screen.
4-4-3. Frequency check that presses key
The frequency to which the key is pressed, insert/pull out frequen-
cy of cradle and insert/pull out frequency of the headphone are
displayed.
Note: Not used for the servicing.
4-4-4. Format
The user’s area is formatted, and ICV for the video and ICV for
audio are initialized.
Note: Not used for the servicing.
Format the set from “Settings” →“Common settings” →“For-
mat” when it home menu in usually operates when the set should
format it.
4-4-5. Destination setting
The destination setting, language information, and sound pressure
regulation information are written in the NAND flash memory.
Note: Not used for the servicing.
4-4-6. Sound pressure regulation setting
ON/OFF of sound pressure regulation is confirmed.
Note: Not used for the servicing.
4-4-7. Firmware version check
The firmware version is displayed.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “OTHER” and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “FWVER”.
4. Press the [u] key, the firmware version is displayed.
liquid crystal display
OTHER FWVER
X.XX.XX
MODEL NAME
NWZ-####
SERIAL NO
@@@@@@@
X.XX.XX : Firmware version
#### : Model name
@@@@@@@ : Serial No.
5. Press the [BACK] key, return to minor item selection screen.

15
NWZ-A726/A726B/A728/A728B/A729
4-4-8. NAND capacity check
Capacity of NAND flash memory, present bud block, maximum
bud block, and vender ID are displayed.
Checking method:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “OTHER”, and press the [B]
key to enter the minor item.
3. Press the [v]/[V] key to select the “NCAPCHK”.
4. Press the [u] key, capacity of NAND flash memory, present
bud block, maximum bud block, and vender ID are displayed.
liquid crystal display
OTHER NCAPCHK
XGB
BAD BLOCK
CUR (####)/MAX (@@@@)
VENDOR ($$$$)
X : Capacity of NAND flash memory
4/8/16 (4 GB/8 GB/16 GB)
@@@@ : Number of present bud block
(It makes an error the acquisition of the number of
bud blocks at “–1”)
#### : Number of maximum bud block
(It makes an error the acquisition of the vender ID
at “–1”)
$$$$ : Vender ID of NAND flash memory
0x98/0xec (TOSHIBA/SAMSUNG)
(It makes an error the acquisition of the vender ID
at “–1”)
5. Press the [BACK] key, return to minor item selection screen.
4-5. CLESTE
liquid crystal display
MPTAPP MENU
POWER
AUDIO
VIDEO
OTHER
CLESTE WCABLE
DAC WOCABLE
SHUTDOWN
EXITTEST
4-5-1. Clear stereo setting (With cable)
This mode is according to an original sound playback, for adjust-
ment to right and left sound.
Note: Not used for the servicing.
4-5-2. Clear stereo setting (No cable)
This mode is according to an original sound playback, for adjust-
ment to right and left sound.
Note: Not used for the servicing.
4-6. DAC
liquid crystal display
MPTAPP MENU
POWER
AUDIO
VIDEO
OTHER
CLESTE
DAC B-GAIN
SHUTDOWN T-GAIN
EXITTEST
4-6-1. BASS-Gain/Fc setting
This mode is adjustment for the sound of BASS when playback.
Note: Not used for the servicing.
4-6-2. TREBLE-Gain/Fc setting
This mode is adjustment for the sound of TREBLE when play-
back.
Note: Not used for the servicing.
4-7. Shutdown
Function that power supply of set can be turned off without ending
static test mode.
Procedure:
1. Enter the test mode.
2. Press the [v]/[V] key to select the “SHUTDOWN”, and press
the [B] key to select the “SURE ?”.
3. Press the [u] key, turn the power off while having entered the
test mode.

16
NWZ-A726/A726B/A728/A728B/A729
MEMO

NWZ-A726/A726B/A728/A728B/A729
NWZ-A726/A726B/A728/A728B/A729
1717
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM - MAIN Section -
USB DATA0 – USB DATA15
SD-RAM
IC701
DP
A3
DM
A4
USB CONTROLLER
IC501
CD0 – CD15
SDR_DATA0 –
SDR_DATA31
SDR_A0 – SDR_A12
XINT E3
A/D CONVERTER,
D/A CONVERTER,
HEADPHONE AMP
IC302
LEVEL SHIFT
IC509
IC508
AB0_D0 – AB0_D15
AB0_A1 – AB0_A8
USB_INT1 AC5
XCS H2 AB0_CSZ2 F22
XRD G3 AB0_RDZ J19
XDACK F4 AB0_XDACK F23
XDREQ G4 AB0_XDMARQ E24
XWRH F3
XWRL H3
AB0_WRZ
H16
XRESET D1 RESETZ
P10
SDR_BA0 AB5
USB_XRST AB13
USB_INT2 AB14
SDINPM0_SO AC22 32 11
SDA/CDINSPIO_SO
AC8 2
SCL/CCLKSPIO_SK
AC7 3
AD0/nCSSPIO_SCZ2
AD7 4
MCLKREFCLKO
U18 30
SDOUTPM0_SI AD22 29
SCLKPM0_CLK
AC21 31
LRCKPM0_SEN
AB22 1
nRESETADA_XRST AC20
HP_XMUTE Y3
25
MUTING
Q302
CN851 (1/3)
17
AU_R_OUT
14
AU_L_OUT
3
D+
4
D–
(WM-PORT)
B8
XI
C8
XO
USB ADDRESS1 – USB ADDRESS8
CA1 – CA8
DQ0 – DQ31
BA0 J7
SDR_BA1
T4BA1 H8
SDR_CLK
AA5 CLK J1
SDR_CSZ0
T3CS J8
SDR_CKE0
T1CKE J2
SDR_WEZ
R5WE K8
SDR_CASZ
U8CAS K7
SDR_RASZ
T5RAS J9
SDR_DQM0
P5DQM0 K9
SDR_DQM1
R4DQM1 K1
SDR_DQM2
R3DQM2 F8
SDR_DQM3
R2DQM3 F2
A0 – A12
SDR_D0O – SDR_D31
SDR_A00 – SDR_A12
NAND FLASH
MEMORY
IC751
NAND_DA0 –
NAND_DA7
NAND_ALE
D3
I/O1 – I/O8
ALE 17
NAND_CLE
E9CLE 16
NAND_CEZ0
M9XCE1 9
NAND_CEZ1
C2XCE2 10
NAND_CEZ2B3
NAND_CEZ3
C3
NAND_REZ
E3XRE 8
NAND_WEZ
A4XWE 18
NAND_RBZ0
D2R/B1 7
NAND_RBZ1
H8R/B2 6
NAND_RBZ2
J8
NAND_RBZ3
K8
NAND_D0O – NAND_D07
NAND FLASH
MEMORY
IC752
I/O1 – I/O8
ALE 17
CLE 16
XCE1 9
XCE2 10
XRE 8
XWE 18
R/B1 7
R/B2 6
RESET SWITCH
IC502
(NWZ-A729)
(NWZ-A728/A728B)
X501
12MHz
AOUTA
10AOUTB
MUTING
Q303
MUTING
CONTROL
Q304
MUTING
CONTROL
Q301
SPIO_XCS0
AC6
CN851 (2/3)
(WM-PORT)
: AUDIO
SIGNAL PATH
(NWZ-A729)
(NWZ-A728/A728B/A729)
(NWZ-A728/A728B/A729)
(NWZ-A728/A728B/A729)
SYSTEM CONTROLLER
IC601 (1/2)
J301
J
HP_R
HP_L
SPIO_SO
SPIO_SK
SPIO_LCD_XCS
SPIO_SO,
SPIO_SK,
SPIO_LCD_XCS
COM110
COM26
1
7NC2
9NC1
4NO2
2NO1
HEADPHONE/WM-PORT
SELECTOR
IC305
CB1
5
CB2
A
CRD_LINEOUT AA1

NWZ-A726/A726B/A728/A728B/A729
NWZ-A726/A726B/A728/A728B/A729
1818
5-2. BLOCK DIAGRAM - PANEL, POWER SUPPLY Section -
POWER CONTROL
IC901
VCC_DCIN
SYSTEM CONTROLLER,
POWER CONTROL
IC601 (2/2)
VCC_VBUS
VCC_VBAT
VDD_UNREG_J
VDD_DDC2_J
20
DCIN
11
USB_DET
12
UNREG_OUT
10
TXD/SLEEP
8
RXD/WAKE
9
CRD_AD
KEY_AD0C6
KEY_AD1B6
EXTRST
G4
XHOLD_KEY
AD4
KEY_WAKE AD5
SHEET KEY
&
S890 - 896
WAKE UP SWITCH
Q603
T26
CKI
U26
CKO
X603
11.2896MHz
AC26
OSCIN
AB26
OSCOUT
X602
32.768kHz
BKBAT USB +1.8V
USB +3.1V
AD17
PSM_LODET U14
CN851 (3/3)
(WM-PORT)
35
2DC
3USB
CHG_ICTL
34BAT
CHARGE
LITHIUM ION
STORAGE
BATTERY
3.7V 610mAh
SYS
8LX2
VDD_DDC3_J 23 LX1
20 EN
31Y2 CISET
12 /DOK
CHG_XCHGEN 10
V10 /CEN
CHG_PEN2 40
W8 PEN2
USB_SUSPEND 1
AB8 USUS
XCHG_DET 39
AC4 CST1
CHG_XFLT 37
AB4
U70_SOUT T17
U70_SRIN T18
CRD_DET AB3
CRD_AD C8
CST2
VOLTAGE
DETECT
IC902
CHARGE
CONTROL
Q901
TXD_PUCTL AB2
+3.1V
REGULATOR
IC602
+1.8V
REGULATOR
IC504
+3.1V
REGULATOR
IC503
HP/WM-PORT +1.8V
+1.8V
REGULATOR
IC301
VDD_ANA_F
VDD_ECO_J
VDD_GP1_J
VDD_GP1_FB_J
VDD_GP3
VDD_GP5
VDD_HP_F
VDD_LO_F
VDD_LOG_F
VDD_PLL_S
S601
RESET
S602
HOLD
OFF
ON
LCD_PXCLK
P23
LCD
ASSY
R0 – R5
LCD_R0 – LCD_R5
6
G0 – G5
LCD_G0 – LCD_G5
B0 – B5
DOTCLK
LCD_HSYNC K22
HSYNC
LCD_VSYNC
K24
LCD_PON W3
LCD_BLTCTL V17
LCD_PWM1 AD23
VSYNC
CATHODE (1)
Q801 CATHODE (2)
CATHODE (3)
SDI
SCL
CS
RESET
LCD_ENABLE K23 DEN
ANODE
LCD_B0 – LCD_B5
LED
CONTROL
IC801
SPIO_SOSPIO_SO
SPIO_SK
SPIO_LCD_XCS
ASPIO_SO, SPIO_SK, SPIO_LCD_XCS
6
6
SIGNAL PATH
: VIDEO

NWZ-A726/A726B/A728/A728B/A729
NWZ-A726/A726B/A728/A728B/A729
1919
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
• C: panel designation.
• A: B+ Line.
• Power voltage is dc 3.7 V and fed with regulated dc pow-
er supply from CN901 pin 1and pin 2on the MAIN
board.
• Voltages and waveform are dc with respect to ground un-
der no-signal conditions.
no mark : PLAY BACK
• Waveform is taken with a oscilloscope.
Voltages variation may be noted due to normal production
tolerances.
• Voltages are taken with a VOM (Input impedance 10
MΩ).
• Voltage variations may be noted due to normal production
tolerances.
• Circled number refer to waveform.
• Signal path.
F: AUDIO
L: VIDEO
• The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
form that of conventional IC.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
• Y: parts extracted from the conductor side.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• MAIN and SW boards are multi-layer printed board.
However, the patterns of intermediate-layers have not
been included in diagrams.
• Indication of transistor.
C
B
These are omitted.
E
Q
Caution:
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts on the parts face side seen from
the pattern face are indicated.
Parts on the pattern face side seen from
the parts face are indicated.
• Lead layouts
surface
CSP (Chip Size Package)Lead layout of conventional IC

NWZ-A726/A726B/A728/A728B/A729
NWZ-A726/A726B/A728/A728B/A729
2020
5-3. PRINTED WIRING BOARD - MAIN Board (Side A) - • : Uses unleaded solder.
E E
1
1
2
41
42
SG
D
1C 2B 2E
1E 1B 2C
3
4
1
2
AF2
E4 D4 B4 A4Y4AA4AB4AC4AE4AF4
B3 A3AE3AF3
D6 B6 A6
AC6AE6AF6
D5 B5 A5AC5AE5AF5
H4J4K4L4M4N4P4
AF1
D9 B9 A9AC9AE9AF9
D10 B10
W1 G1 F1
AE25
H26
J23K23
J26K26L26
M26N26P26R26T26U26V26W26 G26 F26 E26 D26 C26 B26 A26Y26
AA26AC26AE26
AE24
AF23
AF26
AF19
D20
H25J25K25L25
M25N25P25R25T25U25V25W25 G25 F25 E25 D25 C25 B25 A25Y25
H23
AB25AC25
AD26
AD25
AC16AE16
L23
M23N23P23R23T23U23V23W23 G23 F23 E23 D23 B23 A23Y23
AB23AC23AE23
B19
B24 A24
AE19
AC14AE14
B20 A20AC20AE20
D21 B21 A21AC21AE21
D22 B22 A22
AC22AE22
AC12AE12
D17 B17 A17AC17AE17
D18 B18 A18AC18AE18
D19 A19AC19
AC10AE10
D15 B15 A15AC15AE15
D16 B16 A16
A12
A7
AF12
D13 B13 A13AC13AE13
D14 B14 A14
A10
AF10
L11 D11 B11 A11
AC11
AE11
AF25
AF24
AF16
AF14
AF20
AF21
AF22
AF17
AF18
AF15
AF13
AF11
D12 B12
D7 B7AC7AE7AF7
D8 B8 A8AC8AE8AF8
E2
H1J1K1L1M1N1P1R1T1 E1U1V1 D1 C1 B1 A1Y1AA1AB1AC1AD1AE1
H2J2K2L2M2N2P2R2T2U2V2W2 G2 F2 D2 C2 B2 A2Y2AA2AB2AC2AD2AE2
R4T4U4V4W4 G4 F4 C4
C3
C6
C5
C9
C10
C23
C19
C24
C20
C21
C22
C17
C18
C15
C16
C13
C14
C11
C12
C7
C8
AD4
AD3
AD6
AD5
AD9
AD24
AD16
AD23
AD19
AD14
AD20
AD21
AD22
AD12
AD17
AD18
AD10
AD15
AD13
AD11
AD7
AD8
H24J24K24L24
M24N24
P24R24T24U24V24W24 G24 F24 E24 D24Y24
AB24AC24
E3H3J3K3L3M3N3P3R3T3U3V3W3 G3 F3 D3Y3AA3AB3AC3
E5Y5AA5AB5 H5J5K5L5M5N5P5R5T5U5V5W5 G5 F5
J22K22 H22L22
M22N22P22R22T22U22V22W22 G22 F22 E22Y22
AB22
AB26
AA25
AA23
AA24
AA22
E6
E9
E10
E20
E21
E17
E18
E19
E15
E16
E13
E14
E11
E12
E7
E8
AB6
AB9
AB16
AB14
AB20
AB21
AB12
AB17
AB18
AB19
AB10
AB15
AB13
AB11
AB7
AB8
J19K19 H19L19M19N19P19
R19
T19U19V19W19
J18K18 H18L18M18N18P18
R18T18U18V18W18
H8J8K8L8M8N8P8R8T8U8V8W8
H9J9K9L9M9N9P9R9T9U9V9W9
H10J10
K10L10
M10N10
P10R10T10U10V10W10
J17K17 H17L17M17N17P17
R17T17U17V17W17
H15
H16
H13
H14
H11
H12
J15
J16
J13
J14
J11
J12
K15
K16
K13
K14
K11
K12
U16
U14
U15
U13
U11
U12
V16
V14
V15
V13
V11
V12
W16
W14
W15
W13
W11
W12
2
4
3
1
2
4
3
1
6
10
1
5
H8
G8
F8
E8
D8
C8
B8
A8
H7
G7
F7
E7
D7
C7
B7
A7
H6
G6
F6
E6
D6
C6
B6
A6
H5
G5
F5
C5
B5
A5
H4
G4
F4
C4
B4
A4
H3
G3
F3
E3
D3
C3
B3
A3
H2
G2
F2
E2
D2
C2
B2
A2
H1
G1
F1
E1
D1
C1
B1
A1
5
13
4
A1
B1C1D1E1F1G1H1J1K1L1M1N1P1R1
A2B2C2D2E2F2G2H2J2K2L2M2N2P2R2
A3B3C3D3E3F3G3H3J3K3L3M3N3P3R3
A7B7C7D7E7F7G7H7J7K7L7M7N7P7R7
A8B8C8D8E8F8G8H8J8K8L8M8N8P8R8
A9B9C9D9E9F9G9H9J9K9L9M9N9P9R9
2
4
3
1
2
3
R210
FB608
R601R606
R607
R608
R220
R223
R611
R615
R616
R617
R618
R619
CN601
R620 R621
R622
R623
R624
R625
R626
R627
R628
R629
C208
R633
C210
R634
R636 R637 R638 R639
CL101
R252
CL102
JL006
JL007
C601
R256
C602
C603
R640
C604
R641
C606
C607
R643
C608
R644
C609
R646
R647
R648
R649
C610
VDR851
X602
C612
VDR852
X603
C613
FB854
R651
FB855
CL501
C616
FB856
CL502
FB857
R653
FB858
C619
R655
R656
R657
R658
C620
R660
C625 S602
R662
C626
R664
C629
R666
R669
R476
R477
C632
R672
R674
C638
R675
R676
R678
CL910
R679
CN851
(WM-PORT)
CL911
CL912
CL913
C640
CL914
C641
CL915
CL916
C643
C644
R681
C645
C646
R683
C648
R684
R686
Q301
Q302
Q303
Q304
C651
C652
C654
C656
C855
C661
C662
C856
C664
C666
C668
C669
C673
C674
LF851
C675
C679
FL501
IC601
C681
C683
FL701
C690
FB101
C691
C698
C699
FB301
R106
R108
R109
R110
R307
R502
D851
R506
R313
R507
R120
R123
R702
R519
R527 R528
C110
C305
C307
C116
C501
C502
C503
C504
C505
1
22
C506
C507
C508
CL201
C509
CL202
C701
C319
C703
C510
C705
X501
R935
C707
C321
C709
TH901
C711
C713
CL603
CL604
CL610
CL613
CL614
JL907
JL908
C925
CL622
CL623 CL624
CL628 CL629
D101
CL631
D301
CL641
CL644
CL645
CL646
Q603
IC305
L601
L602
CL851
CL852
CL853
CL854
CL855
IC501
CL856
IC502
CL857
CL858
FL601
IC701
FB201
R206
R208
R209
2E
2B
1C
2C
1B
1E
MAIN BOARD (SIDE A)
1-875-443-
11
(11)
A
B
C
D
E
F
G
H
I
12345678910111213141516
HOLD
OFF ON
ASW BOARD
CN881
Note 2: CN601, IC305, IC501, IC601 and IC701 on the MAIN board cannot exchange
with single. When CN601, IC305, IC501, IC601 and IC701 on the MAIN board
are damaged, exchange the entire mounted board.
Ref. No. Location
• Semiconductor Location
Ref. No. Location Ref. No. Location
D101 C-4
D301 A-5
D851 G-2
IC305 D-5
IC501 E-3
IC502 G-6
IC601 F-4
IC701 D-4
Q301 C-2
Q302 C-5
Q303 C-3
Q304 C-2
Q603 H-13
(Page 30)
Note 1: When the MAIN board is replaced, format it according to the “NOTE OF MAIN
BOARD REPLACING” (refer to page 4) of the servicing notes.