HCD-BX77DBI - Sony Audio Service Manual (repair manual). Page 12

COLD  RESET
The cold reset clears all data including preset data stored in the 
RAM to initial conditions. Execute this mode when returning the 
set to the customer.
Procedure:
1.  Press three buttons of [

x

/CANCEL], [VOL +] and [

?/1

] si-

multaneously.

2.  The system is reset and becomes standby states.

COMMON  TEST  MODE
This mode is used to check operations of amplifi er.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press three buttons of [TUNER/BAND], [

x

/CANCEL] and 

[ENTER] simultaneously.

3.  When the COMMON test mode is activated, “AUDIO IN” is 

displayed on the liquid crystal display and “

cPLAY SLEEP” 

blink on the fl uorescent indicator tube.

4.  Each time [EQ] button on the remote commander is pressed, 

the display changes starting “TONE MAX”, “TONE MIN” 
and “TONE FLAT” this order.

5.  Press the [VOL –] button, “VOLUME MIN” is displayed 

on the fl uorescent indicator tube. Press the [VOL +] button, 
“VOLUME MAX” is displayed on the fl uorescent indicator 
tube.

6.  To release this mode, press the [

?/1

] button.

PANEL  TEST  MODE
This mode is used to check the liquid crystal display, LED, model, 
destination, software version and key.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press three buttons of [TUNER/BAND], [DSGX] and [EN-

TER] simultaneously.

3.  All segments on the fl uorescent indicator tube, [STANDBY] 

LED light up.

4.  Press the [ENTER] button, the model and destination are alter-

nately displayed on the fl uorescent indicator tube.

5.  Press the [ENTER] button again, MC version is displayed on 

the fl uorescent indicator tube.

6.  Each time [ENTER] button is pressed, the display changes 

starting from MC version, GC version, CLA version, CD ver-
sion, CDD version, CDMA version, CDMB version, BDA ver-
sion, BDB version, ST version, TA version and TM version 
this order, and returns to the MC version display.

7. When [

x

/CANCEL] button is pressed while the MC version 

is displayed, year, month and day of the software creation is 
displayed. When [

x

/CANCEL] button is pressed again, the 

display returns to the MC version display.

8.  Press the [DSGX] button, the key test mode is activated and 

“K 0” is displayed on the fl uorescent indicator tube.

9.  Each time a button is pressed, “K” value increases. However, 

once a button is pressed, it is no longer taken into account.

 

All keys are pressed, display becomes “K19”.

10. Press the [VOL +] button, the key AD monitor mode is acti-

vated and “FFFFFF” is displayed on the fl uorescent indicator 
tube.

11. Each time a button is pressed, the AD of each button is dis-

played on the fl uorescent indicator tube.

12.  To release this mode, press three buttons in the same manner as 

step 2, or disconnect the power cord.

CD  SHIP  MODE
This mode moves the optical pick-up to the position durable to 
vibration. Use this mode when returning the set to the customer 
after repair.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [FUNCTION] button to select “CD”.
3.  Press three buttons of [DSGX], [VOL +] and [

A

] simultane-

ously.

4.  After the “STANDBY” display blinks, “LOCK” is displayed 

on the fl uorescent indicator tube, the ship mode is set.

CD  SHIP  MODE  &  MEMORY  CLEAR
This mode is used to perform CD ship mode and cold reset simul-
taneously.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press three buttons of [

x

/CANCEL], [VOL +] and [

A

] simul-

taneously.

3.  After the “STANDBY” display blinks, “LOCK” is displayed 

on the fl uorescent indicator tube the ship mode is set and the 
system is reset.

ANTITHEFT  LOCK  MODE
This mode is used to unable to take sample disc out of disc tray in 
the shop.
Procedure:
1.  Press the [

?/1

] button to turn the set on.

2.  Press the [

A

] button to open the disc tray and set the CD disc.

3.  Press the [

A

] button to close the disc tray.

4.  Press the [FUNCTION] button to select “CD”.
5.  Press two buttons of [

x

/CANCEL] and [

A

] for 5 seconds.

6.  The message “LOCKED” is displayed on the fl uorescent indi-

cator tube and the disc tray is locked. (Even if pressing the Z 
button, the message “LOCKED” is displayed on the fl uores-
cent indicator tube and the disc tray is locked)

7.  To release from this mode, press two buttons of [

x

/CANCEL] 

and [

A

] for 5 seconds.

8.  The message “UNLOCKED” is displayed on the fl uorescent 

indicator tube and the disc tray is unlocked.

This mode is used to changed over CD power on/off for decreasing 
of reception noise in the tuner mode.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [FUNCTION] button to select “CD”.
3.  Press the [

?/1

] button again to turn the power off.

4.  Press two buttons of [

x

/CANCEL] and [

?/1

] simultaneously.

5.  The message “CD POWER”, “ON” or “CD POWER”, 

“OFF”is displayed on the fl uorescent indicator tube, and CD 
power on/off is changed over in the tuner mode.