NWD-E023F, NWD-E025F - Sony Audio Service Manual (repair manual). Page 2

FM radio
• Preset
 30 

presets

•  FM Frequency range
  87.5 to 108.0 MHz

IF (FM)
375 kHz

Antenna
Headphone cord antenna

Interface
Headphone: Stereo mini
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 through a USB connector of the player)

Charging time
USB-based charging
Approx. 60 minutes

Battery life (continuous playback)
By setting as follows, a longer battery life can be expected.
The times below are approximated when “Power Save Mode” is set to
“Save ON Super,” and “Sound”, “Clear Stereo”  and “Dynamic  
Normalizer” are deactivated.

The time below may differ depending on ambient temperature or the 
status of use.

Status of the player
Playback at MP3 128 kbps

Approximately 28 hours

Playback at WMA 128 kbps

Approximately 24 hours

Playback at AAC-LC 128 kbps

Approximately 28 hours

Playback at Linear-PCM 1,411 kbps

Approximately 25 hours

At receiving FM broadcasting

Approximately 10 hours

Display
3-line Color LCD

Dimension (w/h/d, projecting parts not included)
81.9 × 22.1 × 13.8 mm (3 

1

/

4

 × 

7

/

8

 × 

9

/

16

 inches)

Dimension (w/h/d)
83.7 × 22.3 × 16.2 mm (3 

3

/

8

 × 

29

/

32

 × 

21

/

32

 inches)

Mass
Approx. 28 g (Approx. 0.99 oz)

Supplied Accessories
Headphones (1)
Style-Up

®

 Panel (1)

USB cap for Style-Up

®

 Panel (1)

Quick Start Guide (1)
Operation Guide (PDF fi le)

*1

 (1)

“Auto Transfer” software

*2

 (1)

*1

  Operation Guide (PDF fi le) is stored in the built-in fl ash memory of the 

player.

*2

  The “Auto Transfer” software is stored in the built-in fl ash memory 

of the player. For details about this software, see “Transferring music 
automatically using the “Auto Transfer” software”.

Design and specifi cations are subject to change without notice.

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

  ..................................................................   5

3-1.   Disassembly Flow ...........................................................   6
3-2.   USB Cover Assy, Style Up (R) Panel Assy ....................   6
3-3.   Cabinet Upper Assy ........................................................   7
3-4.   Cabinet Lower Assy ........................................................   7
3-5.   LCD Unit (LCD401) .......................................................   8
3-6.   Sheet Key (KEY501) ......................................................   8
3-7.   Battery Assy (BT901), MAIN Board ..............................   9

TEST  MODE 

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

5-1.  Printed Wiring Board  .....................................................   13
5-2.  Schematic Diagram - MAIN Board (1/3) - .....................   14
5-3.  Schematic Diagram - MAIN Board (2/3) - .....................   15
5-4.  Schematic Diagram - MAIN Board (3/3) - .....................   16

6-1.  USB Cover , Style Up (R) Panel Section ........................   25
6-2. Cabinet 

Section 

...............................................................  26

6-3.  MAIN Board Section ......................................................   27

  ..............................   28

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

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

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.