Sony NW-A25 / NW-A25HN / NW-A26HN / NW-A27HN Service Manual ▷ View online
NW-A25/A25HN/A26HN/A27HN
33
4-8-3. NFC tag check (OXOXOX)
This mode can be check the NFC tag detection.
This mode can be check the NFC tag detection.
Checking method:
1. Enter the test mode.
1. Enter the test mode.
(Refer to “1. SETTING THE TEST MODE” on page 23)
2. Press
the
[
v
]/[
V
] keys to select the “NFC”, and press the [
B
]
key to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “OXOXOX”.
4. Press the [
u
] key, the NFC tag detection is displayed.
(Displayed characters/values in the following fi gure are ex-
ample)
ample)
NFC TAG STATUS
37
oooooooooooooooo
oooooooooooooooo
xoooooxxxxxxxxxx
xxxxxxxxxxxxxxxx
xxxxxxxxxxxxxx_ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Screen display
The number of detections
Detection history
Updating of detection is performed every 100 milliseconds. If
detect the NFC tag to be displayed “O”. If not detect the NFC
tag to be displayed “X”. Detection history will be displayed up
to 128.
detect the NFC tag to be displayed “O”. If not detect the NFC
tag to be displayed “X”. Detection history will be displayed up
to 128.
This unit
NFC compatible
headphone, active speaker etc.
headphone, active speaker etc.
5. In this state, each time the [
b
] key is pressed, the updating of
NFC tag detection is on/off changes.
6. Press the [BACK] key, return to minor item selection screen.
4-9. USB HOST
MPTAPP (X.XX.XX.XX)
Screen display
POWER
AUDIO
VIDEO
OTHER
CLESTE
DIREC
BLUETOOTH
NFC
USB HOST
SD
FM
NC
NC
SHUTDOWN
EXITTEST
OUTPUT
EYPATT
EYPATT
4-9-1. USB host sine wave output (OUTPUT)
Note: Not used for the servicing.
4-9-2. USB eye pattern test (EYEPATT)
Note: Not used for the servicing.
4-10. SD
MPTAPP (X.XX.XX.XX)
Screen display
POWER
AUDIO
VIDEO
OTHER
CLESTE
DIREC
BLUETOOTH
NFC
USB HOST
SD
FM
NC
NC
SHUTDOWN
EXITTEST
GETINFO
LED
LED
4-10-1. Get SD card information (GETINFO)
Note: Not used for the servicing.
4-10-2. SD card access lamp check (LED)
This mode can be check the lighting of the SD card access lamp.
This mode can be check the lighting of the SD card access lamp.
Checking method:
1. Enter the test mode.
(Refer to “1. SETTING THE TEST MODE” on page 23)
2. Press the [
v
]/[
V
] keys to select the “SD”, and press the [
B
] key
to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “LED”.
4. Press the [
u
] key, the SD card access lamp check is dis-
played.
SD LED
ON
Screen display
Access lamp
5. In this state, each time the [
b
] key is pressed, the SD card ac-
cess lamp is on/off changes.
6. Press the [BACK] key, return to minor item selection screen.
NW-A25/A25HN/A26HN/A27HN
34
4-11. FM
MPTAPP (X.XX.XX.XX)
Screen display
POWER
AUDIO
VIDEO
OTHER
CLESTE
DIREC
BLUETOOTH
NFC
USB HOST
SD
FM
NC
NC
SHUTDOWN
EXITTEST
RCVCHK
4-11-1. Reception output check (RCVCHK)
This mode can be check the FM tuning.
This mode can be check the FM tuning.
Checking method:
1. Enter the test mode.
1. Enter the test mode.
(Refer to “1. SETTING THE TEST MODE” on page 23)
2. Press the [
v
]/[
V
] keys to select the “FM”, and press the [
B
]
key to select the “RCVCHK”.
3. Press the [
u
] key, FM reception output is displayed.
(Displayed values in the following fi gure are example)
FM RCVCHK
90.00 MHz
[ VOL: 30 ]
[ VOL: 30 ]
[RSSI: 0]
[ Sense-H: 18 ]
[ Sense-L: 43 ]
Screen display
Key input settings under this mode of operation
(HOLD off):
(HOLD off):
[
b
]
: Frequency switching
90.00MHz
(default)
76.00MHz 95.75MHz
107.75MHz 87.50MHz 98.00MHz
108.00MHz
108.00MHz
100.00MHz
[VOL +]
: Volume up
[VOL –]
: Volume down
[OPTION] : Color bar display (on/off)
[
B
]
: Back light brightness switching
brightness 3 (default)
brightness 4 bright-
ness 5
brightness 1 brightness 2
Key input settings under this mode of operation
(HOLD on):
(HOLD on):
[VOL +]
: Volume up
[VOL –]
: Volume down
[
B
]
: Frequency up (0.05MHz)
[
b
]
: Frequency down (0.05MHz)
[OPTION] : Sense H/L switching
[
v
]
: Sense up
[
V
]
: Sense down
[
u
]
: Sense value is save
4. Press the [BACK] key, return to minor item selection screen.
4-12. NC (Noise canceller)
MPTAPP (X.XX.XX.XX)
Screen display
POWER
AUDIO
VIDEO
OTHER
CLESTE
DIREC
BLUETOOTH
NFC
USB HOST
SD
FM
NC
NC
SHUTDOWN
EXITTEST
GAIN-L
GAIN-R
NCHPCHK
GAIN-R
NCHPCHK
4-12-1. Microphone gain (L-ch) adjustment (GAIN-L)
This mode can be adjust the microphone gain (L-ch).
This mode can be adjust the microphone gain (L-ch).
Checking method:
1. Enter the test mode.
1. Enter the test mode.
(Refer to “1. SETTING THE TEST MODE” on page 23)
2. Press
the
[
v
]/[
V
] keys to select the “NC”, and press the [
B
] key
to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “GAIN-L”.
4. Press the [
u
] key, microphone gain (L-ch) is displayed.
(Displayed values in the following fi gure are example)
NC GAIN-Lch
27
MODE
0
CVOL
f4 a6
f4 a6
Screen display
Microphone gain
NC mode
Noise Cancellation volume
(displayed for NC mode 0/1/2 only)
(displayed for NC mode 0/1/2 only)
5. In this state, each time the [
b
]/[
B
] keys are pressed, micro-
phone gain (L-ch) is changed.
6. In this state, each time the [HOLD] switch is slide from ON
to OFF, the NC mode changes into “-1 (NC off)/0 (airplane)/1
(train)/2 (offi ce)”.
(train)/2 (offi ce)”.
7. When NC mode is in the state of “0”, “1” or “2”, [VOL +]/
[VOL –] keys is pressed, noise cancellation volume is changes.
8. Save the microphone gain by pressing the [
u
] key and return
to minor item.
If do not save it, press the [BACK] key, return to minor item.
NW-A25/A25HN/A26HN/A27HN
35
4-12-2. Microphone gain (R-ch) adjustment (GAIN-R)
This mode can be adjust the microphone gain (R-ch).
This mode can be adjust the microphone gain (R-ch).
Checking method:
1. Enter the test mode.
1. Enter the test mode.
(Refer to “1. SETTING THE TEST MODE” on page 23)
2. Press the [
v
]/[
V
] keys to select the “NC”, and press the [
B
] key
to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “GAIN-R”.
4. Press the [
u
] key, microphone gain (R-ch) is displayed.
(Displayed values in the following fi gure are example)
NC GAIN-Rch
27
MODE
0
CVOL
f4 a6
f4 a6
Screen display
Microphone gain
NC mode
Noise Cancellation volume
(displayed for NC mode 0/1/2 only)
(displayed for NC mode 0/1/2 only)
5. In this state, each time the [
b
]/[
B
] keys are pressed, micro-
phone gain (R-ch) is changed.
6. In this state, each time the [HOLD] switch is slide from ON
to OFF, the NC mode changes into “-1 (NC off)/0 (airplane)/1
(train)/2 (offi ce)”.
(train)/2 (offi ce)”.
7. When NC mode is in the state of “0”, “1” or “2”, [VOL +]/
[VOL –] keys is pressed, noise cancellation volume is changes.
8. Save the microphone gain by pressing the [
u
] key and return
to minor item.
If do not save it, press the [BACK] key, return to minor item.
4-12-3.
Noise canceling headphone detection
(NCHPCHK)
(NCHPCHK)
This mode can be check the detection of noise canceling head-
phone.
phone.
Note: Noise canceling
headphone is
necessary to execute this mode.
Checking method:
1. Connect noise canceling headphone with the WALKMAN.
2. Enter the test mode.
1. Connect noise canceling headphone with the WALKMAN.
2. Enter the test mode.
(Refer to “1. SETTING THE TEST MODE” on page 23)
3. Press
the
[
v
]/[
V
] keys to select the “NC”, and press the [
B
] key
to enter the minor item.
4. Press the [
v
]/[
V
] keys to select the “NCHPCHK”.
5. Press
the
[
u
] key, the detection of noise canceling headphone
is executed.
Connected Noican HP
Screen display
6. Press the [BACK] key, return to minor item selection screen.
4-13. Shutdown
(SHUTDOWN)
Function that power supply of set can be turned off without ending
static test mode.
static test mode.
Procedure:
1. Enter the test mode.
1. Enter the test mode.
(Refer to “1. SETTING THE TEST MODE” on page 23)
2. Press
the
[
v
]/[
V
] keys 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.
36
NW-A25/A25HN/A26HN/A27HN
SECTION 4
EXPLODED VIEWS
Note:
• -XX and -X mean standardized parts, so
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Items marked “*” are not stocked since
they are seldom required for routine ser-
vice. Some delay should be anticipated
when ordering these items.
vice. Some delay should be anticipated
when ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)
Parts Color Cabinet’s Color
4-1. REAR CASE SECTION (NW-A25/A25HN)
1
4
4
2
5
3
front panel section
6
Note: Refer to page 13 for more about
the pasting position of HI-RES
label (Ref. No. 1).
label (Ref. No. 1).
1
4-538-017-01 HI-RES LABEL (See Note)
2
4-538-026-12 KNOB HOLD (SILVER) . . . (Silver)
2
4-538-026-32 KNOB HOLD (PINK) . . . (Bordeaux Pink)
2
4-538-026-41 KNOB HOLD (BLACK) . . . (Charcoal Black)
2
4-538-026-51 KNOB HOLD (BLUE) . . . (Viridian Blue)
2
4-538-026-61 KNOB HOLD (RED) . . . (Cinnabar Red)
2
4-538-026-71 KNOB HOLD (YELLOW) . . . (Lime Yellow)
3
9-885-204-03 SVX CASE REAR ASSY A25B (Including Guide
light, Sheet) (for Charcoal Black) (CEW)
3
9-885-204-04 SVX CASE REAR ASSY A25Y (Including Guide
light, Sheet) (for Lime Yellow) (CEW)
3
9-885-204-05 SVX CASE REAR ASSY A25B (Including Guide
light, Sheet) (for Charcoal Black) (EE)
3
9-885-204-06 SVX CASE REAR ASSY A25Y (Including Guide
light, Sheet) (for Lime Yellow) (EE)
3
9-885-204-07 SVX CASE REAR ASSY A25B (Including Guide
light, Sheet) (for Charcoal Black) (E (A25))
3
9-885-204-08 SVX CASE REAR ASSY A25S (Including Guide
light, Sheet) (for Silver) (E (A25))
3
9-885-204-09 SVX CASE REAR ASSY A25Y (Including Guide
light, Sheet) (for Lime Yellow) (E (A25))
3
9-885-204-13 SVX CASE REAR ASSY A25B (Including Guide
light, Sheet) (for Charcoal Black) (CH)
3
9-885-204-14 SVX CASE REAR ASSY A25S (Including Guide
light, Sheet) (for Silver) (CH)
3
9-885-204-15 SVX CASE REAR ASSY A25Y (Including Guide
light, Sheet) (for Lime Yellow) (CH)
3
9-885-204-31 SVX CASE REAR ASSY A25L (Including Guide
light, Sheet) (for Viridian Blue) (CEW)
3
9-885-204-32 SVX CASE REAR ASSY A25P (Including Guide
light, Sheet) (for Bordeaux Pink) (CEW)
3
9-885-204-33 SVX CASE REAR ASSY A25R (Including Guide
light, Sheet) (for Cinnabar Red) (CEW)
3
9-885-204-34 SVX CASE REAR ASSY A25R (Including Guide
light, Sheet) (for Cinnabar Red) (EE)
3
9-885-204-35 SVX CASE REAR ASSY A25L (Including Guide
light, Sheet) (for Viridian Blue) (E (A25))
3
9-885-204-36 SVX CASE REAR ASSY A25P (Including Guide
light, Sheet) (for Bordeaux Pink) (E (A25))
3
9-885-204-37 SVX CASE REAR ASSY A25R (Including Guide
light, Sheet) (for Cinnabar Red) (E (A25))
3
9-885-204-41 SVX CASE REAR ASSY A25L (Including Guide
light, Sheet) (for Viridian Blue) (CH)
3
9-885-204-42 SVX CASE REAR ASSY A25P (Including Guide
light, Sheet) (for Bordeaux Pink) (CH)
3
9-885-204-43 SVX CASE REAR ASSY A25R (Including Guide
light, Sheet) (for Cinnabar Red) (CH)
4
4-540-882-01 SCREW, 0+P2 M1.4 APSLOCK (L = 7.2 mm)
(BLACK) (for Charcoal Black, Viridian Blue,
Bordeaux Pink, Cinnabar Red)
4
4-540-882-11 SCREW, 0+P2 M1.4 APSLOCK (L = 7.2 mm)
(SILVER) (for Silver, Lime Yellow)
5
X-2592-319-1 SVX LID SLOT ASSY (B) (Including O ring slot)
(for Charcoal Black)
5
X-2592-320-1 SVX LID SLOT ASSY (S) (Including O ring slot)
(for Silver)
5
X-2592-321-1 SVX LID SLOT ASSY (L) (Including O ring slot)
(for Viridian Blue)
5
X-2592-322-1 SVX LID SLOT ASSY (P) (Including O ring slot)
(for Bordeaux Pink)
5
X-2592-323-1 SVX LID SLOT ASSY (R) (Including O ring slot)
(for Cinnabar Red)
5
X-2592-324-1 SVX LID SLOT ASSY (Y) (Including O ring slot)
(for Lime Yellow)
6
4-582-818-01 SHEET
FR
ADHESIVE
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
• Refer to “COLOR VARIATION” in the
“SERVICING NOTES” (page 10) about
color variation of model and destination.
color variation of model and destination.
• Refer to “DESTINATION ABBREVIATIONS”
on page 4 for CEW, E (A25) and E (A26HN).
Click on the first or last page to see other NW-A25 / NW-A25HN / NW-A26HN / NW-A27HN service manuals if exist.