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METHOD  OF  JUDGING  RIGHT  AND  WRONG  OF  
PARTS  RELATED  TO  SWITCH
In this set, only a part of parts that relate to the switch are supplied. 
Exchange the entire mounted board when parts that do not corre-
spond to it are defective.
The right and wrong of the switch can be judged by the following 
two methods.

1.  Judgment From The Test Mode
Judge the right and wrong of the switch referring to “4-4-2. Key 
check” (page 16).

2.  Judgment from the voltage measurement
Judge the right and wrong of the switch by the voltage measure-
ment with a test point.
2-1.  RESET key (S603)
Connection:

When the voltage value is below, RESET key (S603) is normal.
• 

RESET key (S603) is pressed 

: 0 V

• 

RESET key (S603) is not pressed : 2.85 V

When the voltage value is below, NOISE CANCELING switch 
(S871) is normal.
• 

NOISE CANCELING switch (S871) is turned on  : 0 V

• 

NOISE CANCELING switch (S871) is turned off : 2.85 V

When the voltage value is below, HOLD switch is normal.
• 

HOLD switch was is turned on  : 0 V

• 

HOLD switch was is turned off  : 2.85 V

When the voltage value is below, [VOL +]/[VOL –] keys are nor-
mal.
• 

Keys are not pressed  : 2.85 V

• 

[VOL -] key is pressed : 0 to 0.25 V

• 

[VOL +] key is pressed : 0.4 to 0.6 V

u

B

b

v

V

When the voltage value is below, [

u

]/[

B

]/[

b

]/[

v

]/[

V

] keys are 

normal.
• 

Keys (S872 - S876) are not pressed : 2.85 V

• [

u

] key (S872) is pressed 

: 0 to 0.25 V

• [

B

] key (S873) is pressed 

: 0.4 to 0.6 V

• [

b

] key (S874) is pressed 

: 0.75 to 0.95 V

• [

v

] key (S875) is pressed 

: 1.11 to 1.31 V

• [

V

] key (S876) is pressed 

: 1.46 to 1.66 V

When the voltage value is below, [BACK] [OPTION] keys (S877, 
S878) are normal.
• 

Keys (S877, S878) are not pressed  : 2.85 V

• 

[BACK] key (S877) is pressed 

: 0.75 to 0.95 V

• 

[OPTION] key (S878) is pressed  : 1.11 to 1.31 V

Note: Refer to page 19 for the schematic diagram. Refer to page 

20 for the printed wiring boards.

This section is extracted 
from instruction manual.

 BACK/HOME button

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.

 5-way button

Starts playback and enables
navigation of the player’s on-screen
menus.

 Headphone jack

For connecting the headphones.
Insert the plug until it clicks into
place. If the headphones are
connected improperly, the sound
from the headphones may not sound
right.

About the Noise Canceling function
(NWZ-S736F/S738F/S739F only)
The Noise Canceling function is
available only when using the
supplied headphones.
The supplied headphones can only
be used for these models, and cannot
be used for other equipment.

 WM-PORT jack

Use this jack to connect the supplied
USB cable, or optional peripheral
devices, such as supported
accessories for the WM-PORT.

 NOISE CANCELING switch (NWZ-

By sliding the NOISE CANCELING
switch in the direction of the arrow

, the Noise Canceling function is
activated.

 Display

The display may vary, depending on
functions.

 VOL +

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 in 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

Displays the option menu.
If you press and hold the OPTION/
PWR OFF button, the 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.

• 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.

 RESET button

Resets the player when you press the
RESET button with a small pin, etc.

1

Functions marked with

on the

player are activated if you press and hold
the corresponding buttons.

2

There are tactile dots. Use them to help
with button operations.

3

The shape of the headphone jack hole
varies depending on the model.

• 

This set can be disassembled in the order shown below.

Note: Follow the disassembly procedure in the numerical order given.

R adhesive sheet (escutcheon-A)

in the direction of arrow ". 

RB MAIN board

× 3.5) 

"

6

2

4 holder (B)

3 adhesive sheet (holder)

1 sheet (main-PWB) 

9 battery assy

8 spacer (BATT)

7 adhesive sheet (BATT)

5 battery connector