Sony NW-A25 Service Manual
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Sony NW-A25 Service Manual

Sony NW-A25 Service Manual

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SERVICE MANUAL
Ver. 1.2 2016.08
Note:
Be sure to keep your PC used for service and
checking of this unit always updated with the
latest version of your anti-virus software.
In case a virus affected unit was found during
service, contact your Service Headquarters.
• NW-A25 is not supplied headphones.
• NW-A25HN/A26HN/A27HN (except CEW) are supplied Headphones (MDR-NW750N).
• NW-A25HN/A27HN (CEW) are supplied Headphones (MDR-NW750NE).
• "WALKMAN" name of NW-A25HN is NW-A25.
• "WALKMAN" name of NW-A26HN is NW-A26.
• "WALKMAN" name of NW-A27HN is NW-A27.
Display
Size/resolution
2.2-inch (5.6 cm), QVGA (320 × 240 Pixels), 262,144 colors
Panel type
TFT color display with white LED-backlight
Interface
USB
Hi-Speed USB (USB 2.0 compliant)
Headphone
Stereo mini-jack
WM-PORT
WM-PORT (multiple connecting terminal): 22 pins
External memory
microSD
microSDHC
microSDXC
FM radio
FM Frequency range
87.5 MHz to 108.0 MHz
Antenna
Headphone cord antenna
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
9-896-211-03
2016H33-1
Sony Video & Sound Products Inc.
©
2016.08
SPECIFICATIONS
Bluetooth
Bluetooth Specifications
Communication system: Bluetooth specification version 3.0
Frequency band: 2.4 GHz band (2.4000 GHz - 2.4835 GHz)
Modulation method: FHSS
Compatible Bluetooth profiles (*1)
A2DP (Advanced Audio Distribution Profile)
AVRCP (Audio Video Remote Control Profile)
OPP (Object Push Profile)
Supported Codec (*2): SBC (*3), aptX, LDAC
Output (headphones)
Frequency response
20 Hz to 40,000 Hz (when playing data file, single signal measurement)
Noise canceling system
Digital Noise canceling
Select NC Environment: Full-auto AINC, Bus/Train, Airplane, Office
Power Source
Built-in Rechargeable lithium-ion Battery
USB power (from a computer via a USB connector of the player)
Charging Time
USB-based charging
Approx. 4 hours
NW-A25/A25HN/
A26HN/A27HN
Canadian Model
NW-A26HN/A27HN
AEP Model
NW-A25HN/A27HN
Australian Model
Chinese Model
Korean Model
NW-A25/A25HN/A27HN
Tourist Model
Russian Model
NW-A25HN/A26HN/A27HN
Latin American Model
Operating temperature
5 °C to 35 °C (41 ºF to 95 ºF)
Dimensions
w/h/d, projecting parts not included
43.6 mm × 109 mm × 8.7 mm (1 3/4 inches x 4 3/8 inches x 11/32 inches)
w/h/d
44.4 mm × 109.1 mm × 9.1 mm (1 3/4 inches x 4 3/8 inches x 3/8 inches)
Mass
66 g (2.4 oz)
Capacity
Capacity
NW-A25: 16 GB
NW-A25HN: 16 GB
NW-A26HN: 32 GB
NW-A27HN: 64 GB
(*1)
Bluetooth profiles are standardized according to the purpose of the Bluetooth device.
(*2)
Codec indicates the audio signal compression and conversion format.
(*3)
SBC stands for Subband Codec.
– Continued on next page –
DIGITAL MEDIA PLAYER
US Model
UK Model
E Model
NW-A25/A26HN
NW-A25
NW-A25HN

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Summary of Contents for Sony NW-A25

  • Page 1 • NW-A25 is not supplied headphones. • NW-A25HN/A26HN/A27HN (except CEW) are supplied Headphones (MDR-NW750N). • NW-A25HN/A27HN (CEW) are supplied Headphones (MDR-NW750NE). • “WALKMAN” name of NW-A25HN is NW-A25. • “WALKMAN” name of NW-A26HN is NW-A26. • “WALKMAN” name of NW-A27HN is NW-A27.

  • Page 2: Flexible Circuit Board Repairing

    The approximate times are estimated in the case where only videos are transferred. The time default settings. may differ, depending on the conditions under which the player is used. Photo (*7) (Photo Viewer) Music NW-A25 (16 GB) Photo Formats MP3 128 kbps Video: 384 kbps/Music: 128 kbps JPEG Noise Cancel ON: Approx.

  • Page 3: Table Of Contents

    2-14. 5PIN HP Assy (HPJ1), MAIN Board ......22 TEST MODE ............23 EXPLODED VIEWS 4-1. Rear Case Section (NW-A25/A25HN) ......36 4-2. Rear Case Section (NW-A26HN/A27HN) ..... 37 4-3. Front Panel Section ............38 4-4. BT Board Section ............39 4-5.

  • Page 4: Section 1 Servicing Notes

    NW-A25/A25HN/A26HN/A27HN Ver. 1.1 SECTION 1 SERVICING NOTES The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit. ABOUT REUSE OF THE BATTERY ASSY (BAT1) METHOD OF DISTINGUISHING THE “WALKMAN” It cannot reuse, when the battery assy (BAT1) is removed from ad- MAIN UNIT hesive sheet (in the plate (LCD)).
  • Page 5 English (one byte character). Described with the example that “the folders were saved under root directory of C drive” on this service manual. Note 8: NW-A25 (Korean model) is used “E_NOHP”. 2. Working contents NW-A25HN (Korean model) and NW-A27HN (Korean model) Work according to the following order.
  • Page 6 NW-A25/A25HN/A26HN/A27HN 6. Input the following command according to the information 2-2. Initial Setting checked at step 2, and press the Enter key on PC. After the destination setting, be sure to perform the initial setting. “updating.bat f:” (“f:” is drive letter) Used tool: Color_Init_Setting_NWA20_yyyymmdd.zip...
  • Page 7 NW-A25/A25HN/A26HN/A27HN Ver. 1.1 7. The following message is displayed. Then, the initial setting 5. Input the following command according to the information operation starts. checked at step 2, and press the Enter key on PC. “dest_hp.bat f:” (Using 2-byte characters, it may not be displayed correctly) (“f:”...

  • Page 8: Main Board (Side A)

    NW-A25/A25HN/A26HN/A27HN 2-4. NC parameter setting 6. Confi rm that the following message has been displayed, and input “y”, and press the Enter key on PC. This unit has digital noise cancelling function. Therefore, NC pa- rameter data for each channel should be writing into NAND IC (Using 2-byte characters in part, it may not be displayed correctly) when replacing the MAIN board.
  • Page 9 NW-A25/A25HN/A26HN/A27HN 18. Press the [ ] keys to select the “NC”, and press the [ ] key 22. Press the [ ] key, and confi rm that the NC parameter setting to enter the minor item. value for R-ch is updated properly.
  • Page 10 ABOUT THE SONY STORE SPECIAL MODEL When the board installed by this unit is defective, replace the com- The Sony Store special model is available for the NW-A25 E model plete mounted board. The individual mounted electrical parts can- (except for some countries or regions) and CH model.

  • Page 11: Section 2 Disassembly

    NW-A25/A25HN/A26HN/A27HN SECTION 2 DISASSEMBLY • This set can be disassembled in the order shown below. 2-1. DISASSEMBLY FLOW 2-2. CASE REAR BLOCK (Page 12) 2-3. BUTTON VOL, PANEL FRONT ASSY 2-4. CASE REAR ASSY (Page 13) (Page 14) 2-5. SHORT-LAND SOLDER (Page 14) 2-6.

  • Page 12: Case Rear Block

    NW-A25/A25HN/A26HN/A27HN Note: Follow the disassembly procedure in the numerical order given. 2-2. CASE REAR BLOCK 1 two 0+P2 M1.4 APSLOCK screws (L = 7.2 mm) Note 3: When installing the case rear block, be careful not to pinch the adhesive sheet FR.

  • Page 13: Button Vol, Panel Front Assy

    NW-A25/A25HN/A26HN/A27HN 2-3. BUTTON VOL, PANEL FRONT ASSY guide line adhesive sheet (button_VOL) 3 0+P2 M1.4 screw 4 0+P2 1.4 POWERLOK (L = 2 mm) screw (L = 5.3 mm) 3 0+P2 M1.4 screw 4 0+P2 1.4 POWERLOK (L = 2 mm) screw (L = 5.3 mm)

  • Page 14: Case Rear Assy

    NW-A25/A25HN/A26HN/A27HN 2-4. CASE REAR ASSY 4 knob hold 3 claw bottom 6 case rear assy 1 claw 2 lid slot assy o ition o t e eet F e ive case rear assy – Front view – fold 5 sheet FR adhesive...

  • Page 15: Sw Board

    NW-A25/A25HN/A26HN/A27HN 2-6. SW BOARD Note 1: The SW board cannot replace with single. If replace the SW Note 2: When the SW board or MAIN board are replaced, the data board, be sure to replace the MAIN board simultaneously. writing processing etc. are necessary. For details, refer to “ABOUT WORKING OF THE BOARD REPLACING”...

  • Page 16: Nfc Antenna (Nfc1)

    NW-A25/A25HN/A26HN/A27HN 2-8. NFC ANTENNA (NFC1) 2 Insert straight into the interior. 1 Unlock the CN002. a a i – Ri view – NFC antenna 3 Lock the CN002. BT-VOL FPC board guide line 4 NFC antenna (NFC1) 4 Affix the sheet (BT).

  • Page 17: Bt-Vol Fpc Board

    NW-A25/A25HN/A26HN/A27HN 2-9. BT-VOL FPC BOARD 3 Lock the CN2101. 1 Unlock the CN2101. 2 Insert straight into the interior. 2 Unlock the connector. (CN2101) 3 Draw the FPC out of the connector. 4 Affix the sheet (BT). 1 sheet (BT) 3 Draw the FPC out of the connector.

  • Page 18: Bt Board

    NW-A25/A25HN/A26HN/A27HN 2-10. BT BOARD 1 0+P2 M1.4 screw (L = 2 mm) 1 0+P2 M1.4 screw 2 BT board (L = 2 mm) bottom – Rear view –...

  • Page 19: Battery Assy (Bat1)

    NW-A25/A25HN/A26HN/A27HN 2-11. BATTERY ASSY (BAT1) a er wire e i 1 Solder the 2 Solder the 3 Affix the sheet (ENT). battery wire. battery wire. [black] [red] 2 Remove the solder. [white] Note 2: When the battery wire is removed, refer to “ABOUT INSULATING OF...

  • Page 20: Liquid Crystal Display Panel (Lcd1)

    NW-A25/A25HN/A26HN/A27HN 2-12. LIQUID CRYSTAL DISPLAY PANEL (LCD1) 8 liquid crystal display panel (LCD1) sheet (PWB) fold back guide line 5 Lift up the LCD block guide line in the direction of the arrow. – LCD block rear view – 7 sheet...

  • Page 21: Main Board Block

    NW-A25/A25HN/A26HN/A27HN 2-13. MAIN BOARD BLOCK 4 support HP block 1 screw (M1.4) support HP block Note: When installing the support HP block, (L = 2.5 mm) align the two grooves and two bosses. 3 boss 2 claw 3 boss – e view –...

  • Page 22: 5Pin Hp Assy (Hpj1), Main Board

    NW-A25/A25HN/A26HN/A27HN Ver. 1.1 2-14. 5PIN HP ASSY (HPJ1), MAIN BOARD Note 1: When MAIN board is replaced, the data writing processing etc. are necessary. For details, refer to “ABOUT WORKING OF THE BOARD REPLACING” on page 5. How to install the HP FPC 1 Unlock the CN1001.

  • Page 23: Section 3 Test Mode

    NW-A25/A25HN/A26HN/A27HN SECTION 3 TEST MODE 4-1-1. Power supply voltage check (VCHK) Note 1: Information on the test mode must correspond in enough This mode can be check the power supply voltage in the state security. When the leakage has been revealed by any where all power supply lines are starting.
  • Page 24 NW-A25/A25HN/A26HN/A27HN 4-1-3. Standby current check (DSVCHK) 4-1-5. Smart phone charge/discharge function check This mode can be check the standby current. (SMPCHGCH) Note: Not used in this unit. Checking method: 4-1-6. Battery voltage detection check (BATTCHK) 1. Enter the test mode.
  • Page 25 NW-A25/A25HN/A26HN/A27HN 4-2. Audio (AUDIO) 4-2-2. S/N check (SN) While playing the audio track, it’s in a repeat state. If [BACK] key “Infi nity Zero VOLUME: 25” audio signal is outputted. is pressed, it’s stopped. Press the [ ] key to switch the HPOUT/LINEOUT/SPEAKER.
  • Page 26 NW-A25/A25HN/A26HN/A27HN 4-2-4. Frequency characteristic 2 check (F2) 4-2-6. CH separation (R-ch) check (SEPRL) “20 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output- “1 kHz 0 dBs R-ch VOLUME: 25” audio signal is outputted. ted. Checking method: Checking method: 1.
  • Page 27 NW-A25/A25HN/A26HN/A27HN 4-2-8. Normalizer check (NMLZR) 4-2-11. User specifi cation contents playback 1 (USER1) “1 kHz –24 dBs L-ch/R-ch VOLUME: 30” audio signal is output- This mode can be check the user specifi cation contents playback. ted. This mode is not used for the servicing. Please check in normal mode.
  • Page 28 NW-A25/A25HN/A26HN/A27HN 4-2-13. User specifi cation contents playback 3 (USER3) 4-3. Video (VIDEO) This mode can be check the user specifi cation contents playback. Screen display This mode is not used for the servicing. Please check in normal MPTAPP (X.XX.XX.XX) mode.
  • Page 29 NW-A25/A25HN/A26HN/A27HN 4-3-2. User specifi cation contents playback 1 (USER1) 4-4. Other (OTHER) This mode can be check the user specifi cation contents playback. Screen display This mode is not used for the servicing. Please check in normal MPTAPP (X.XX.XX.XX) mode.
  • Page 30 NW-A25/A25HN/A26HN/A27HN 4-4-2. Key check (KEY) 4-4-7. Firmware version check (FWVER) This mode can be check the operation of the keys. This mode can be check the fi rmware version. Checking method: Checking method: 1. Enter the test mode. 1. Enter the test mode.
  • Page 31 NW-A25/A25HN/A26HN/A27HN 4-5. Clear stereo (CLESTE) 4-7. Bluetooth (BLUETOOTH) Screen display Screen display MPTAPP (X.XX.XX.XX) MPTAPP (X.XX.XX.XX) POWER POWER AUDIO AUDIO VIDEO VIDEO OTHER OTHER CLESTE WCABLE CLESTE DIREC WOCABLE DIREC BLUETOOTH BLUETOOTH SETADR CONNECT USB HOST USB HOST SETFRQ USER1...
  • Page 32 NW-A25/A25HN/A26HN/A27HN 7. Put the Bluetooth device you want to connect with in discover- 4-7-6. User specifi cation contents playback 3 (USER3) able mode. This mode can be user specifi cation contents playback to the de- (Refer to the operating instructions supplied with the Blue- vice with the Bluetooth address described in “SETADR”.
  • Page 33 NW-A25/A25HN/A26HN/A27HN 4-8-3. NFC tag check (OXOXOX) 4-9-2. USB eye pattern test (EYEPATT) Note: Not used for the servicing. This mode can be check the NFC tag detection. 4-10. SD card (SD) Checking method: 1. Enter the test mode. Screen display (Refer to “1.
  • Page 34 NW-A25/A25HN/A26HN/A27HN 4-11. FM tuner (FM) 4-12. Noise canceller (NC) Screen display Screen display MPTAPP (X.XX.XX.XX) MPTAPP (X.XX.XX.XX) POWER POWER AUDIO AUDIO VIDEO VIDEO OTHER OTHER CLESTE CLESTE DIREC DIREC BLUETOOTH BLUETOOTH USB HOST USB HOST RCVCHK GAIN-L SHUTDOWN SHUTDOWN GAIN-R...
  • Page 35 NW-A25/A25HN/A26HN/A27HN 4-12-2. Microphone gain (R-ch) adjustment (GAIN-R) 4-12-3. Noise canceling headphone detection This mode can be adjust the microphone gain (R-ch). (NCHPCHK) This mode can be check the detection of noise canceling head- Checking method: phone. 1. Enter the test mode.

  • Page 36: Section 4 Exploded Views

    9-885-204-35 SVX CASE REAR ASSY A25L (Including Guide 4-538-026-41 KNOB HOLD (BLACK) . . . (Charcoal Black) light, Sheet) (for Viridian Blue) (NW-A25: E (A25)) 4-538-026-51 KNOB HOLD (BLUE) . . . (Viridian Blue) 9-885-204-36 SVX CASE REAR ASSY A25P (Including Guide...

  • Page 37: Rear Case Section (Nw-A26Hn/A27Hn)

    NW-A25/A25HN/A26HN/A27HN Ver. 1.1 4-2. REAR CASE SECTION (NW-A26HN/A27HN) front panel section Note: Refer to page 13 for more about the pasting position of HI-RES label (Ref. No. 51). Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark...

  • Page 38: Front Panel Section

    NW-A25/A25HN/A26HN/A27HN 4-3. FRONT PANEL SECTION • Rear view BT board section Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-536-370-01 SCREW, 0+P2 1.4 POWERLOK (L = 5.3 mm) X-2592-314-1 SVX PANEL FRONT ASSY (S) 4-543-326-01 SHEET (BUTTON_VOL) ADHESIVE...

  • Page 39: Bt Board Section

    NW-A25/A25HN/A26HN/A27HN 4-4. BT BOARD SECTION • Rear view 1000 (SHEET (BT)) 1000 (SHEET (BT)) When replacing with new parts, cut out and use the POLYIMIDE SHEET at the specified size. NFC1 Note: The thickness or material may differ from the part before replacement, but it is not a problem.

  • Page 40: Main Board Section

    • Rear view Note 6: Take note that the pre-installed content will be lost if the SW chassis section board of the Sony Store special model is replaced (make sure it is replaced at the same time with the MAIN board). BAT1...

  • Page 41: Chassis Section

    NW-A25/A25HN/A26HN/A27HN 4-6. CHASSIS SECTION • Rear view LCD1 1000 (SHEET (PWB)) When replacing with new parts, cut out and use the POLYIMIDE SHEET at the specified size. Note: The thickness or material may differ from the part before replacement, but it is not a problem.

  • Page 42: Section 5 Accessories

    NW-A25/A25HN/A26HN/A27HN Ver. 1.1 SECTION 5 ACCESSORIES For NW-A25 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-573-948-31 MANUAL, INSTRUCTION (ENGLISH, RUSSIAN, 4-196-348-01 PIECE (M), EAR (Earbud: size M) (1 piece) ARABIC, TRADITIONAL CHINESE, (CLEAR MILKY: 3 lines)
  • Page 43 NW-A25/A25HN/A26HN/A27HN MEMO...
  • Page 44 Description of Revision 2015.08 2016.02 Addition of US and Canadian models (NW-A26HN/A27HN) Addition of Latin American model (NW-A25HN) Addition of Part for HINGE CUSHION (L) (Not supplied) (SMR-15037) 2016.08 Addition of Sony Store special model (E and Chinese models) (SMR-16022)

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