ICD-PX440 (serv.man2) - Sony Audio Service Manual (repair manual). Page 15

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ICD-PX440
15
4-6. SIN
Sine wave can be outputted.
Procedure:
1.  Enter the test mode.
 
(Refer to “SETTING THE TEST MODE” on page 12)
2. Press 
the 
[
>
] or [
.
] keys to select the “SIN”, and press 
the [
N
] key.
3.  Sine wave is outputted.
 
(Displayed characters/values in the following fi gure are ex-
ample)
Vol:10
<SIN>
LCD Display
 
Initial value:
 
Play back volume  : 10 (stereo)
 fs 
44.1kHz
 
Sound is outputted from the D-AMP built-in CPU at the time 
of headphone wearing.
 
Key input settings under this mode of operation:
 
[VOL +]  : Volume up
 
[VOL –]  : Volume down
Operation of others by the plug/unplug signal (the external micro-
phone jack and headphone jack) are based on operation of this unit.
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
4-7. BEEP
Beep sound (1.3 kHz) can be outputted.
Procedure:
1.  Enter the test mode.
 
(Refer to “SETTING THE TEST MODE” on page 12)
2. Press 
the 
[
>
] or [
.
] keys to select the “BEEP”, and press 
the [
N
] key.
3.  Beep sound (1.3 kHz) is outputted.
 
(Displayed characters/values in the following fi gure are ex-
ample)
1.3KHz ON
Vol:10
<BEEP>
LCD Display
Output to the speaker or headphone and output level are based on 
operation of this unit.
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
4-8. LCD CONT
LCD contrast can be adjusted.
Procedure:
1.  Enter the test mode.
 
(Refer to “SETTING THE TEST MODE” on page 12)
2.  Press the [
>
] or [
.
] keys to select the “LCD CONT”, and 
press the [
N
] key.
3.  Adjustment of LCD contrast becomes available.
 
(Displayed characters/values in the following fi gure  are  ex-
ample)
Vol: 12
[FF]+ [FR]
[PLAY] Save
<LCD CONT>
LCD Display
 
Initial value:
 
The default setting saved at eMMC.
 
Key input settings under this mode of operation:
 
[.]  : Contrast value decrease
 
[>] 
: Contrast value increase
 
[
N
: The current contrast value is written to eMMC.
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
4-9. RTC TEST
The self-test of RTC module can be done.
Procedure:
1.  Enter the test mode.
 
(Refer to “SETTING THE TEST MODE” on page 12)
2.  Press the [
>
] or [
.
] keys to select the “RTC TEST”, and 
press the [
N
] key.
3.  The self-test of RTC module is executed, and result is dis-
played.
 
(Displayed characters/values in the following fi gure  are  ex-
ample)
OK
<RTC TEST>
LCD Display
RTC self-test result
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
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