ICD-S7 - Sony Audio Service Manual (repair manual). Page 9

9

4. 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.

5. Beep test
• Beep sound of 1.3 kHz or 2 kHz is output.

6. SIO test
• Perform the connection test of the RTC, EEPROM and serial to

parallel conversion IC.

• As to the test result, if all of the connection test are OK,

“****OK****” is displayed. If the connection test of the RTC is
NG, “**RTCNG**” is displayed. If the EEPROM is NG,
“**EEPNG**” is displayed.

7. Key entry test
• When the any key is pressed, the entry key and the A/D converted

value (hexadecimal) of the two channel keys are displayed.

• When the  STOP  key is pressed, the A/D value of the key is

displayed while the key is depressed. When the key is released,
the screen returns to the test menu.

8. Battery remaining power test
• The detected A/D value (hexadecimal) of the battery remaining

power is displayed.

9. LED/EL test
• LED (red and green) and EL are all turned on.

any keys

any keys

SLEEP TEST

SLEEP IN

LCD OFF

(with HOLD OFF status) 

x•B

(with HOLD ON status) 

x•B

x•B

BEEP TEST

1.3K BEEP

2.0K BEEP

1.3K BEEP

1.3K BEEP

2.0K BEEP

:

:

(set) 

x•B

(select), 

.

>

STOP

STOP

STOP

x•B

SIO TEST

SIO OK

STOP

x•B

KEY TEST

0-FF 1-FF

STOP

x•B

BATT TEST

STOP

10. USB test
• When the menu starts the USB self-check, either presence or

absence of the Vbus is judged.
(Vbus is present: “VBUS: ON”, Vbus is absent: “VBUS: OFF”)

• The USB driver always works regardless of presence or absence

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.

11. DC-IN test
LCD : Detection result of external DC power supply is display is

displayed of LCD.

12. DATA READ test (not used)
Not use for test command design check or verification.

13. Rest menu
• Pressing the  x

•B    key causes the set to enter the menu

initialization standby state.

• When the following keys are all entered and the  x

•B  key is

pressed, the initialization is executed. At the same time, the
WakeUp signal is checked, too.

Check keys: VOLUME+ , VOLUME– , A-B REPEAT ,

INDEX , STOP , zREC , ERASE , . ,
x•B , > , MENU , FOLDER
and check states of Memory Stick insert and
outsert ( EJECT ).

• If all tests end in success, “**ALLOK**” is displayed. If the key

entry is NG or if any of the keys is not pressed yet, “**KEYNG**”
appears. If saving in the EEPROM is NG, “**MENUNG**”
appears.

x•B

LED TEST

LED EL ON

STOP

x•B

RESET

RESET KEY

RESET OK

x•B

In the case that the           key entry
and saving in the EEPROM end correctly,
after the check key is entered.

STOP

STOP

x•B

Suspend

USB

VBUS ON

LCD OFF

When Vbus is on, HOLD  key turns on.

STOP
or cut Vbus

STOP
cut Vbus

x•B

DC JACK

JACK ON OFF

(        )

STOP