Sony XDR-S40DBP, Service Manual

XDR-S40DBP

10

SECTION  3

TEST  MODE

1.  PREPARATION  OF  TEST  MODE

Prepare the following before checking test mode.
• AC 

adaptor

•  Regulated DC power supply
•  Dry battery 4PCS. (SIZE “AA”, IEC designation LR6)
• Dummy 

battery

• Headphone
• Signal 

generator

• Oscilloscope
• Loop 

antenna

• Ammeter

2.  LCD  CHECK

Procedure:

1.  AC adaptor is inserted in DC jack (J201).
2.  Press the [

?/1

] button to turn the power on.

3.  Press the [DAB/FM] button, and checks that there is no “

” 

mark in the upper right of the liquid crystal display.

4.  Press and hold the [

?/1

] button, while pressing the [MENU] 

button.

5.  Release the [MENU] button ([

?/1

] button is holding).

6.  Press the [

v

], [

V

] button in order, and release the [

?/1

] button. 

Enter the test mode and the “FW VER” appears.

7.  Press the [

v

] or [

V

] buttons, select the “LCD CHK”, and press 

the [ENTER/DISP] button.

8.  The back light is turned on, and press the [

v

] or [

V

] buttons to 

change the display pattern.

(Displayed characters in the following 

fi

 gure are example)

It checks that there are not contrast inconsistency and defective 
indication.

9.  Pull out the AC adaptor.

3.  VERSION,  RTC  AND  CURRENT  CONSUMPTION  

CHECK

Procedure:

1.  Dummy battery is set to the unit, and it connects with a regu-

lated DC power supply, and outputs the voltage of 6V.

2.  Telescopic antenna is set, and press the [

?/1

] button to turn the 

power on.

Checks that there is “

” mark in the upper right of the liquid 

crystal display.

3.  Press and hold the [

?/1

] button, while pressing the [MENU] 

button.

4.  Release the [MENU] button ([

?/1

] button is holding).

5. Press 

the 

[

v

], [

V

] button in order, and release the [

?/1

] button. 

Enter the test mode and the “FW VER” appears.

6.  Press the [ENTER/DISP] button to display the 

fi

 rmware ver-

sion.

(Displayed characters/values in the following 

fi

 gure are ex-

ample)

7.  Press the [BACK] button, return to the test menu.
8. Press 

the 

[

v

] or [

V

] buttons, select the “RTC CHK”, and press 

the [ENTER/DISP] button to start the RTC check.

The message “RTC_OK” appears on the liquid crystal display. 
Press the [BACK] button, return to the test menu.

9.  Press the [

v

] or [

V

] buttons, select the “INIT”, and press the 

[ENTER/DISP] button twice to turn the power off.

10. Press the [

?/1

] button to turn the power on.

11.  Press the [DAB/FM] button, change to DAB function.
 

Checks that current consumption is under 150 mA using an 
ammeter.

12. Press the [DAB/FM] button, change to FM function.
 

Checks that current consumption is under 160 mA using an 
ammeter.

13. Press the [

?/1

] button to turn the power off.

Checks that current consumption is under 30 

μ

A using an am-

meter.

14. Remove dummy battery.

(Display is all off)

FW VER

FW VER