DOWNLOAD Sony NW-A25 / NW-A25HN / NW-A26HN / NW-A27HN Service Manual ↓ Size: 2.93 MB | Pages: 44 in PDF or view online for FREE

Model
NW-A25 NW-A25HN NW-A26HN NW-A27HN
Pages
44
Size
2.93 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
nw-a25-nw-a25hn-nw-a26hn-nw-a27hn.pdf
Date
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Sony NW-A25 / NW-A25HN / NW-A26HN / NW-A27HN Service Manual ▷ View online

NW-A25/A25HN/A26HN/A27HN
25
4-2. Audio (AUDIO)
While playing the audio track, it’s in a repeat state. If [BACK] key 
is pressed, it’s stopped.
Press the [
b
] key to switch the HPOUT/LINEOUT/SPEAKER.
MPTAPP (X.XX.XX.XX)
Screen display
POWER
AUDIO
VIDEO
OTHER
CLESTE
DIREC
BLUETOOTH
NFC
USB HOST
SD
FM
NC
SHUTDOWN
EXITTEST
OUTPUT
SN
F1
F2
SEPLR
SEPRL
MAXOUT
NMLZR
SPCHK
SPKCHK
USER1
USER2
USER3
HIRES
4-2-1.  Output check (OUTPUT)
“1 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “OUTPUT”.
4. Press 
the 
[
u
] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 25” 
audio signal is outputted.
AUDIO OUTPUT
1kHz 0dBs L/Rch
HPOUT [ VOL: 25 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-2-2.  S/N check (SN)
“Infi nity Zero VOLUME: 25” audio signal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “SN”.
4.  Press the [
u
] key, “Infi nity Zero VOLUME: 25” audio signal 
is outputted.
AUDIO SN
Infinity Zero
HPOUT [ VOL: 25 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-2-3.  Frequency characteristic 1 check (F1)
“20 Hz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “F1”.
4. Press 
the 
[
u
] key, “20 Hz 0 dBs L-ch/R-ch VOLUME: 25” 
audio signal is outputted.
AUDIO F1
20Hz 0dBs L/Rch
HPOUT [ VOL: 25 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
NW-A25/A25HN/A26HN/A27HN
26
4-2-4.  Frequency characteristic 2 check (F2)
“20 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output-
ted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “F2”.
4.  Press the [
u
] key, “20 kHz 0 dBs L-ch/R-ch VOLUME: 25” 
audio signal is outputted.
AUDIO F2
20kHz 0dBs L/Rch
HPOUT [ VOL: 25 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-2-5.  CH separation (L-ch) check (SEPLR)
“1 kHz 0 dBs L-ch VOLUME: 25” audio signal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “SEPLR”.
4.  Press the [
u
] key, “1 kHz 0 dBs L-ch VOLUME: 25” audio 
signal is outputted.
AUDIO SEPLR
1kHz 0dBs Lch
HPOUT [ VOL: 25 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-2-6.  CH separation (R-ch) check (SEPRL)
“1 kHz 0 dBs R-ch VOLUME: 25” audio signal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “SEPRL”.
4. Press 
the 
[
u
] key, “1 kHz 0 dBs R-ch VOLUME: 25” audio 
signal is outputted.
AUDIO SEPRL
1kHz 0dBs Rch
HPOUT [ VOL: 25 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-2-7.  Maximum output check (MAXOUT)
“1 kHz 0 dBs L-ch/R-ch VOLUME: 30” (When operating the 
AVLS in the state of HPOUT: “1 kHz 0 dBs L-ch/R-ch VOLUME: 
19”) audio signal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “MAXOUT”.
4. Press 
the 
[
u
] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 30”  
audio signal is outputted.
 
AUDIO MAXOUT
1kHz 0dBs L/Rch
HPOUT [ VOL: 30 ]
AVLS OFF
START
Screen display
5.  In HPOUT state, each time the [
B
] key is pressed, AVLS on/off 
switch is performed.
6.  Press the [BACK] key, return to minor item selection screen.
NW-A25/A25HN/A26HN/A27HN
27
4-2-8.  Normalizer check (NMLZR)
“1 kHz –24 dBs L-ch/R-ch VOLUME: 30” audio signal is output-
ted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “NMLZR”.
4. Press 
the 
[
u
] key, “1 kHz –24 dBs L-ch/R-ch VOLUME: 30” 
audio signal is outputted.
AUDIO NMLZR
1kHz -24dBs L/Rch
HPOUT [ VOL: 30 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-2-9.  Sound pressure regulation level check (SPCHK)
“1 kHz 0 dBs L-ch/R-ch VOLUME: 30” audio signal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “SPCHK”.
4. Press 
the 
[
u
] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 30”  
audio signal is outputted.
AUDIO SPCHK
1kHz 0dBs L/Rch
HPOUT [ VOL: 30 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-2-10.  Speaker check (SPKCHK)
Note: Not used for the servicing.
4-2-11. User specifi cation contents playback 1 (USER1)
This mode can be check the user specifi cation contents playback.
This mode is not used for the servicing. Please check in normal 
mode.
Checking method:
1.  By releasing the test mode, please to the normal mode.
 
(Refer to “2. RELEASING THE TEST MODE” on page 23)
2.  Connect the PC and this unit, and copy the audio fi le (User1.
mp3) to root of this unit.
Copy the file to root of this unit.
(drag and drop)
3.  Disconnect the PC and this unit.
4.  Press the [BACK] key for more 1.5 seconds, the home menu is 
displayed.
5.  Press the [
v
]/[
V
]/[
b
]/[
B
] keys to select the “Music”, and press 
the [
u
] key.
6. Press 
the 
[
v
]/[
V
] keys to select the “All Songs”, and press the 
[
u
] key.
7.  Press the [
v
]/[
V
] keys to select the copied fi le in step 2.
8.  Press the [
u
] key, check that the audio fi le is playback.
4-2-12. User specifi cation contents playback 2 (USER2)
This mode can be check the user specifi cation contents playback.
This mode is not used for the servicing. Please check in normal 
mode.
Refer to “4-2-11. User specifi cation contents playback 1 (USER1)” 
for checking method.
NW-A25/A25HN/A26HN/A27HN
28
4-2-13. User specifi cation contents playback 3 (USER3)
This mode can be check the user specifi cation contents playback.
This mode is not used for the servicing. Please check in normal 
mode.
Refer to “4-2-11. User specifi cation contents playback 1 (USER1)”  
on page 27 for checking method.
4-2-14.  Hi-Res output (HIRES)
“1kHz 0dBs 48kHz sampling L-ch/R-ch VOLUME: 30” audio sig-
nal is outputted.
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 “AUDIO”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] keys to select the “HIRES”.
4.  Press the [
u
] key, “1kHz 0dBs 48kHz sampling L-ch/R-ch 
VOLUME: 30” audio signal is outputted.
AUDIO HIRES
1kHz 0dBs L/Rch 48k
HPOUT [ VOL: 30 ]
START
Screen display
5.  Press the [BACK] key, return to minor item selection screen.
4-3. Video (VIDEO)
MPTAPP (X.XX.XX.XX)
Screen display
POWER
AUDIO
VIDEO
OTHER
CLESTE
DIREC
BLUETOOTH
NFC
USB HOST
SD
FM
NC
SHUTDOWN
EXITTEST
LCD
USER1
USER2
USER3
4-3-1.  LCD display check (LCD)
This mode can be check the screen display.
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 “VIDEO”, and press the 
[
B
] key to select the “LCD”.
3.  Press the [
u
] key, all black is displayed on the screen.
4.  In this state, each time the [OPTION] or [VOL +] key is 
pressed, the screen display changes in the following order.
 
All black (default) 
 Color bar (standard)  Color bar 
(brightness minimum) 
 Color bar (brightness maximum)  
All red 
 All green  All blue  All white  Maximum 
drawing size confi rmation 
 diagonal gradation (red)  di-
agonal gradation (green) 
 diagonal gradation (blue)  di-
agonal gradation (white)
 
Maximum drawing size confi rmation:
 
All blue (All sides are red) is displayed. Whether red in all 
sides is seen is confi rmed.
5.  In this state, each time the [
B
] key is pressed, brightness 
changes in the following order.
 
brightness 3 (default) 
 brightness 4  brightness 5  
brightness 1 
 brightness 2
6.  Press the [BACK] key, return to minor item selection screen.
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