SV-SD350VGC, SV-SD350VGH, SV-SD350VGK, SV-SD350VGT, SV-SD350VSG, SV-SD300EB, SV-SD300EG, SV-SD300GC, SV-SD300GN, SV-SD300SG - Panasonic Audio Service Manual (repair manual). Page 8

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8
6.2.1.
Service Mode Function & Canceling The Service Mode
* About service mode menu of SV-SD300
SV-SD300 cannot recording and playback of voice and FM. Therefore, the item of SERVICE 10, 11 and 12 is not used. 
* Auto power OFF in operation check modes
Although the audio player is equipped with an auto power OFF function, this function is disabled when executing all operation
check mode menu functions except SERVICE 1.
An automatic power OFF which is unrelated to the auto power OFF function occurs at the completion of MODEL.
Menu Item
Service Mode
Description
Operation After
Menu Selection
Buttons Used
Canceling The
Service Mode
Service Mode Function
SERVICE 1
Switches the 
LCD display 
mode.
(Backlight 
always turns on)
Returns to standard 
screen.
[+], [-], 
[PLAY/STOP]
Turn power OFF, or 
switch back to LCD 
display mode.
Because the display content must be checked 
during service mode execution, the backlight is 
always ON at this menu.
SERVICE 2
Device key 
serial number 
display.
Service mode is 
executed.
None
Turn power OFF.
Verifies that the device key is written without error to 
the main PCB's IC4 (Flash ROM).
SERVICE 3
Control button 
operation 
checks and 
remaining 
battery capacity 
display check.
Service mode is 
executed.
[FWD-Skip], 
[REW-Skip], 
[MODE], [MARK], 
[+], [-] 
(AD value 
measurement)
Turn power OFF.
Displays the rechargeable battery voltage, and the 
KEY IN voltage's AD conversion values 
(hexadecimal) at the [FWD-Skip], [REW-Skip], 
[MODE],[MARK], [+], [-] key operations.
The AD conversion value is used for button 
operation checks and for the remaining battery 
capacity display.
SERVICE 4
Model and 
region display.
Service mode is 
executed.
None
Turn power OFF.
Displays the model and region information.
This content cannot be changed.
SERVICE 5
Do not use this mode.
SERVICE 6
Do not use this mode.
SERVICE 7
Do not use this mode.
SERVICE 8
Card 
recognition
check.
Service mode is 
executed.
None
Open the battery 
cover.
Verifies that the SD-card (where audio file is saved) 
can be recognized.
SERVICE 9
Checks the 
audio playback 
operation.
Service mode is 
executed.
None
Open the battery 
cover.
Performs repeat playback and checks for audio 
playback errors.
SERVICE 10
*SV-SD350V
only
Checks the 
voice playback 
operation.
Service mode is 
executed.
None
Open the battery 
cover.
Performs repeat playback and checks for voice 
playback errors.
SERVICE 11
*SV-SD350V
only
Checks the 
voice recording 
operation.
Service mode is 
executed.
None
Open the battery 
cover.
Repeats the "SD-card formatting, full recording 
(recording until card's capacity is completely used), 
and playback" procedure, and then checks for voice 
recording and playback errors.
SERVICE 12
*SV-SD350V
only
Checks the FM 
recording 
operation.
After tuner tuning, 
Service mode is 
executed.
[FWD-Skip], 
[REW-Skip], 
[PLAY/STOP]
Open the battery 
cover.
Performs "FM radio reception”, repeats the “SD-card 
formatting, full recording (recording until card's 
capacity is completely used), recording, and 
playback" procedure, and then checks for FM 
recording and playback errors.
SERVICE 13
Performs a 
device check.
Service mode is 
executed.
None
Open the battery 
cover.
Checks for malfunctions at the main PCB's IC8 and 
IC4, and peripheral circuitry.
MODEL
Model and 
region setting.
Model and region 
setting.
[+], [-], 
[PLAY/STOP]
After completing 
the setting, power 
is automatically 
turned OFF.
Model and region information are rewritten, and it 
makes it to the default corresponding to them.

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