Read Sony ICD-PX440 (serv.man2) Service Manual online
ICD-PX440
14
4-4. KEY CHECK
Operation of keys and switches can be checked, and this unit can
return to the factory shipment settings (Peculiar parameters, such
as LCD contrast, do not initialize).
Operation of keys and switches can be checked, and this unit can
return to the factory shipment settings (Peculiar parameters, such
as LCD contrast, do not initialize).
Note 1: It cannot move to other modes from this mode.
Procedure:
1. Enter the test mode.
1. Enter the test mode.
(Refer to “SETTING THE TEST MODE” on page 12)
2. Press the [
>
] or [
.
] keys to select the “KEY CHECK”,
and press the [
N
] key.
3. Whenever any keys of this unit are pressed or any switches of
this unit are slid, the button count decreases.
(Displayed characters/values in the following fi gure are ex-
ample)
ample)
KEY:PREV
REMAIN: 20
REMAIN: 20
<KEY CHECK>
LCD Display
Button count
Confirmed key name
Target keys:
[STOP/
x
], [
.
], [
>
], [
N
], [REC/PAUSE
z
], [
A-B],
[ERASE], [VOL +], [VOL –], [MENU], [FOLDER], [T-
MARK], [
MARK], [
v
], [
V
]
Target switches:
[DPC (SPEED CTRL)] (ON, OFF), [HOLD•POWER ON/
OFF] (“POWER” direction, return from “POWER” direction,
“HOLD” direction, return from “HOLD” direction)
OFF] (“POWER” direction, return from “POWER” direction,
“HOLD” direction, return from “HOLD” direction)
4. After all the keys and switches are decided, initialization is
performed.
5. “Success” is displayed, and this unit reboots.
Success
LCD Display
Note 2: This unit is not initialized when “Failure” is displayed.
Releasing method:
Remove battery.
Remove battery.
4-5. AUDIO LOOP
Audio loop back operation can be performed.
Audio loop back operation can be performed.
Procedure:
1. Enter the test mode.
1. Enter the test mode.
(Refer to “SETTING THE TEST MODE” on page 12)
2. Press
the
[
>
] or [
.
] keys to select the “AUDIO LOOP”,
and press the [
N
] key.
3. Audio loop back operation is performed.
(Displayed characters/values in the following fi gure are ex-
ample)
ample)
Note: When mode is active, the recording level for VOR is acquired at in-
tervals of 1 second, and it is displayed. When the acquired recording
level is larger than the VOR setting value, the operation indicator
LED redly lights up.
level is larger than the VOR setting value, the operation indicator
LED redly lights up.
(Threshold value is based on operation of this unit)
MIC:M AGC:ON
Vol:10 MIC IN
D H0 D0
VOR:00003FFF
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)
H0: HP_MUTE=L, (H1: H)
D0: DAMP_XSEL=L, (D1: H)
<AUDIO LOOP>
LCD Display
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.
of headphone wearing.
Key input settings under this mode of operation:
[VOL +]
: Volume up
[VOL –]
: Volume down
[REC/PAUSE/
z
] : Microphone sensitivity change
(H
→ M → L → MusicH → MusicL →
H...)
[
N
]
: External microphone sensitivity
(MIC IN
↔ LINE IN)
[
.
]
: AGC operation (ON
↔ OFF)
[
>
]
: The headphone amplifi er change
(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.
phone jack and headphone jack) are based on operation of this unit.
Releasing method:
Press the [STOP/
Press the [STOP/
x
] key, return to test mode menu.
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