ICD-UX522, ICD-UX522F, ICD-UX523, ICD-UX523F - Sony Audio Service Manual (repair manual). Page 12

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ICD-UX522/UX522F/UX523/UX523F
12
4-2. KEY CHECK
Operation of keys and switches can be checked, and this unit can 
return to the factory shipment settings.
Note 1: It cannot move to other modes from this mode.
Procedure:
1.  Enter the test mode.
2.  Press the [
>
] or [
.
] keys to select the “KEY CHECK”, 
and press the [
N
/ENTER] key.
3.  Whenever any keys of this unit are pressed or any switches of 
this unit are slid, the button count decreases.
<KEY CHECK>
LCD Display
*Displayed characters/values are example.
KEY:PREV
REMAIN: 15
Button count 
Confirmed key name
 
Target keys:
 
[STOP/
x
], [>], [.], [
N
/ENTER], [REC/PAUSE/
z
], 
 
[
 /
A-B], [ERASE], [VOL +], [VOL –], [MENU], [FOLDER], 
 [T-MARK], 
[
v
], [
V
]
 
Target switches:
 
[DPC (SPEED CTRL)] (ON, OFF), [HOLD], [POWER], 
[NOISE CUT] (ON, OFF)
4.  After all the keys and switches are decided, initialization is 
performed.
5.  “Success” is displayed, and this unit reboots. 
Note 2: This unit is not initialized when “Failure” is displayed.
Releasing method:
Remove battery.
4-3. AUDIO LOOP
Audio loop back operation can be performed.
Procedure:
1.  Enter the test mode.
2. Press 
the 
[
>
] or [
.
] keys to select the “AUDIO LOOP”, 
and press the [
N
/ENTER] key.
3.  Audio loop back operation is performed.
Note: When mode is active, the recording level for VOR is acquired at 
intervals of 1 second, and it is displayed. When the acquired record-
ing level is larger than the VOR setting value, red LED lights up.
 
(Threshold value is based on operation of this unit)
<AUDIO LOOP>
MIC: M AGC: OFF
Vol: 10 MIC IN
D H0 D0
VOR: 00003FFF
D: DAMP, (A: Codec)
H0: HP-MUTE=L, (H1: H)
D0: DAMP_XSEL=L, (D1: H)
LCD Display
*Displayed characters/values are example.
 
Initial value:
 
Play back volume 
: 10 (stereo)
 
fs 
: 44.1 kHz
 
Microphone sensitivity  : M
 
External microphone 
: MIC IN
 HP_MUTE 
L
 DAMP_XSEL 
L
 
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
 [REC/PAUSE/
z
] : Microphone sensitivity change 
 
 
  (H → L → M → H...)
 
[
N
/ENTER] 
: External microphone sensitivity
 
 
  (mounted model only)
 
 
  (MIC IN ↔ LINE IN)
 
[
.
: AGC operation (ON ↔ OFF)
 
[
>
: The headphone amplifi er change
 
 
  (mounted model only)
 
 
  (D-AMP ↔ Codec)
 
[ERASE] 
: HP_MUTE forcible operation
 
 
  Only HP_MUTE is changed with a 
 
 
  play back state held (ON ↔ OFF).
 
[
 /
A-B] 
: DAMP_XSEL forcible operation
 
 
  Only DAMP_XSEL is changed with
 
 
  a play back state held (ON ↔ OFF).
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.
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