Sony ICD-SX25 Service Manual page 9

3. Sleep test
• Pressing the x•B key causes the set to enter the sleep state.
• When the HOLD . switch is ON, the LCD is turned off.
When OFF, the LCD is turned on.
• Press any keys to exit the sleep state.
x•B
(with HOLD .
OFF status)
SLEEP SLEEP SOON
x•B
(with HOLD .
ON status)
4. Beep test
• Beep sound of 1.3 kHz or 2 kHz is output.
x•B
BEEP BEEP1. 3 K
:
x
BEEP 2. 0 K
BEEP 1. 3 K
:
5. RTC test
• Perform the function test of the RTC and EEPROM.
(1) RTC EEPROM test
Confirmation of writing, reading (verifying) and erasing of
arbitrary data with the specified registers.
(2) RTC clock function test
Confirmation that RTC updates the time to the microcomputer
at one second interval.
• OK, NG judgement is performed to the test result.
When NG, it is displayed which device RTC or EEPROM
becomes NG.
(All OK : "RTC OK" / RTC NG : "RTC BAD" / EEPROM NG
: "EEP BAD")
RTC
6. Key entry test
• When the any key is pressed, the entry key and the A/D con-
verted value (hexadecimal) of the two channel keys are dis-
played.
• When the x key is pressed, the A/D value of the key is dis-
played while the key is depressed. When the key is released, the
screen returns to the test menu.
KEY
7. Battery remaining power and DC IN test
• The detected A/D value (hexadecimal) of the battery remaining
power is displayed. When DC jack is inserted, the battery mark
on the LCD is turned off.
x•B
bATT FF
B A T T
x
SLEEP IN
(LCD OFF)
any keys any keys
. > (select), x•B
(set)
on BEEP1. 3 K on BEEP 2. 0 K
x x
x•B
RTC OK
x
x•B
KEY oFFiFF
x
DC jack
is inserted
bATT FF bATT C2
DC jack
is extracted
8. LED test
• LEDs (OPR: red and green) are all turned on.
LED
LED OFF
9. USB test
• When the menu starts the USB self-check, either presence or
absence of the Vbus is judged.
(Vbus is present: "ON VBUS", Vbus is absent: "OFF VBUS")
• The USB driver always works regardless of presence or ab-
sence of the USB signal only when Vbus is available during the
USB test. At this time, turning on HOLD . causes the set
to move to the suspend state. Turning off the Vbus causes the
set to return to the test menu.
• In the menumode if the Vbus is supplied, any key will not work.
Therefore the Vbus will be supplied after surely pressing the
x•B key.
Vbus
x•B
on
USB VBUS OFF
x
10. Key durable test
• Pressing the x•B key makes the count to "------" and sets test
standby status.
Once more pressing the x•B key makes the count to "000000"
and sets the key durable test.
In this mode any key input and slide switch operation are counted
and the number is displayed.
Turn off the power to exit this mode.
x•B
KEY COUNT KEY-----
x
11. Menu reset
• Pressing the x•B key causes the set to enter the menu initial-
ization standby state.
• When the following keys are all entered, the EEPROM initial-
ization (returning setting in the menu and user name to default
value) and formatting process (deleting all message files in the
flash memory) are executed. At the same time, the WakeUp
signal is checked, too.
Check keys: VOL– , VOL+ , A-B
DIVIDE , DPC ON , DPC OFF , . ,
x•B , > , FOLDER , MENU , x ,
z REC , HOLD . ON , HOLD .
OFF , DIRECTNL ON, and DIRECTNL
OFF , VOICE UP ON, and VOICE UP
OFF
ICD-SX25/SX25VTP
x•B
LED ON
x LED ON (orange)
HOLD .
ON
Suspend
VBUS ON SUSPEND
mode
cut Vbus cut Vbus
any keys or slide
switches operation
x•B
KEY 000000 KEY 000001
Key durable
test
, ERASE ,
9