NW-A25, NW-A25HN, NW-A26HN, NW-A27HN - Sony Audio Service Manual (repair manual). Page 34

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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
SHUTDOWN
EXITTEST
RCVCHK
4-11-1.   Reception output check (RCVCHK)
This mode can be check the FM tuning.
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 “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 ]
[RSSI: 0]
[ Sense-H: 18 ]
[ Sense-L: 43 ]
Screen display
 
Key input settings under this mode of operation 
(HOLD off):
 
[
b
: Frequency switching
  
 
 
90.00MHz 
(default) 
 76.00MHz  95.75MHz 
 107.75MHz  87.50MHz  98.00MHz  
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):
 
[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
SHUTDOWN
EXITTEST
GAIN-L
GAIN-R
NCHPCHK
4-12-1.  Microphone gain (L-ch) adjustment (GAIN-L)
This mode can be adjust the microphone gain (L-ch).
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 “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
Screen display
Microphone gain
NC mode
Noise Cancellation volume
(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)”.
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.
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