ICD-PX312, ICD-PX312D, ICD-PX312F, ICD-PX312 M, ICD-PX312M (serv.man2) - Sony Audio Service Manual (repair manual). Page 8

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ICD-PX312/PX312D/PX312F/PX312M
8
1.  Version test
•  Version of the respective modules are verifi ed.
<VERSION>
LCD DISPLAY
Please Eenter
ENTER
+
ICD-PX312/U
‡
Model Name
‡
Destination
‡
FW Version
‡
Initial Ward 
‡
Charge:
C0(Without)/C1(With)
M0(Without)/M1(With)
R0(Without)/R1(With)
‡
Memory Slot:
‡
FM(AM) Radio: 
‡
eMMC Marker Code
‡
eMMC Capacity
‡
IPL2 Version
‡
CPU Version
MAINFW : 1.00.00
L : US C0M1R0
eMMC 15 02GB
+
+
IPL2FW:1.00.00
LSI 4252
•  Press the [
x
] button to return to the test mode screen.
2.  Key Check test
•  Perform the key check by pressing the keys.  
LCD DISPLAY
ENTER
<KEY CHECK>
Please Enter
19
/
<KEY CHECK>
18
/
<KEY CHECK>
KEY : ERASE
The number of keys and slide
switches that are not pressed
after the transition to KEY 
CHECK is indicated.
The last key that has been pressed
is indicated.
The counter is decreased by 1 since
the ERASE key is pressed for the 
first time. Thereafter , it will not be 
decreased even when the ERASE key
is pressed.
Where 19 is counted down to 0 by 
pressing of other keys. The setting is
formatted to the factory setting.
• [
x
]/[– 
.
]/[
>
 +]/[
N
 ENTER]/[
z
]/[  A-B]/
 
[ERASE]/[VOL –]/[VOL +]/[DISP/MENU]/
 [
]/[SCENE]/[T-MARK]/[HOLD ON/OFF]/
 
[POWER ON/OFF]/[NOISE CUT ON/OFF]
•  Key inputs may be done in any desired order.
 
When a key input is confi rmed, the name of the key and the 
number of undetected keys are indicated.
•  Once all the key inputs are confi rmed, “ACCESS” is displayed 
starting initialization. After the initialization has been complet-
ed, the system is rebooted. (The POWER ON state is held.)
•  The status is held with the message “ERROR” displayed. (The  
system is not rebooted.)
•  The transition from this mode to other mode is inhibited.
•  To exit this mode, disconnect power (unplug the battery).
3.  Audio Loop test
•  Execute the AUDIO LOOP BACK.
LCD DISPLAY
ENTER
<AUDIO LOOP>
Please Enter
AGC : ON
AGC
00:MIC IN
01:AUDIO IN
H
VOR Level
VOR value
External microphone:
Internal microphone:
VOR:00000000
10
/00
M
L
•  The Audio Loop Back operation is executed.
 
Initial Value: Play VOL = 20/fs = 44.1 kHz/Stereo
 
Microphone Sensitivity: H
 
External microphone: MIC IN
•  When the set is operating, the recording level for VOR is con-
stantly acquired and indicated.
 
(The level is sampled and held at intervals of 1 second.)
 
The red LED illuminates when the level is greater than the 
VOR set value.
•  During operation, change the setting by using the following 
key inputs:
 
[VOL +]: Volume up
 
[VOL –]: Volume down
 
[REC]: Change microphone sencitivity 
   (M 
t L t H t.......)
 
[PLAY]: External microphone sencitivity 
 
 
(MIC IN t AUDIO IN t MIC IN t.......)
 
[REW]: ALC operation (ONtOFFtONt.......)
•  Other operation by the external microphone jack and head-
phone jack insert/extract signals is based on the operation of 
the set.
•  Press the [
x
] button to return to the test mode screen.
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