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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 sup-
plied.
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 “4-4-3. 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.

When the voltage value is below, RESET key (SW1) is normal.
•  RESET key (SW1) is pressed 

: 0 V

•  RESET key (SW1) is not pressed  : 3.1 V

When the voltage value is below, HOLD switch (SW610) is nor-
mal.
•  HOLD switch (SW610) is turned on  : 0 V
•  HOLD switch (SW610) is turned off  : 3.1 V

2-3. [u]/[B]/[b]/[v]/[V]/[BACK]/[OPTION]/[VOL +]/[VOL –] 

When the voltage value is below, [u]/[B]/[b]/[v]/[V]/[BACK] 
[OPTION]/[VOL +]/[VOL –] keys are normal.
•  Keys are not pressed 

: 3.1 V

• [u] key (SW605) is pressed 

: 1.35 to 1.53 V

• [B] key (SW606) is pressed 

: 1.71 to 1.85 V

• [b] key (SW607) is pressed 

: 2.03 to 2.15 V

• [v] key (SW608) is pressed 

: 2.36 to 2.46 V

• [V] key (SW609) is pressed 

: 2.69 to 2.85 V

•  [BACK] key (SW604) is pressed 

: 1.09 to 1.20 V

•  [VOL –] key is pressed 

: 0.12 to 0.40 V

•  [VOL +] key was pushed 

: 0.68 to 0.95 V

J601 pin 
J601 pin 

When the voltage value is below, OPTION key (SW601) is nor-
mal.
•  OPTION key (SW601) is pressed 

: 0 V

•  OPTION key (SW601) is not pressed : 3.1 V

J601 pin 
J601 pin 

Note: Refer to page 20 for the schematic diagram. 
 

Refer to page 19 for the printed wiring boards.

This section is extracted 
from instruction manual.

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 plug  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*

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

 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/PWROFF 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  4  hours,
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.

•  This set can be disassembled in the order shown below.

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

 battery (N) assy

 static shield sheet

 battery connector

 batt sheet

 gasket (volume)