CX-JN55, JAX-N55 - Sony Audio Service Manual (repair manual). Page 17

17

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 the

I/

1

button to turn the power ON.

2. Press three buttons of

x

, [P FILE] and [DISC 1] simultane-

ously.

3. The message “COLD RESET” is displayed on the fluorescent

indicator tube momentarily, then becomes standby states.

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

I/

1

button to turn the power on.

2. Press the [CD] button to select “CD”.
3. Press two buttons of [CD] and [POWER] simultaneously.
4. The message “LOCK” is displayed on the fluorescent indicator

tube, and the CD ship mode is set.

This mode is used to perform CD chip (lock) mode and cold reset
simultaneously.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the [CD] button to select “CD”.
3. Press three buttons of

x

, [CD] and [POWER] simultaneously.

4. The message “COLD RESET” is displayed on the fluorescent

indicator tube momentarily, then becomes standby states.

This mode is used to enable function of external input to change
over between MD and VIDEO.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press two buttons of

VIDEO (MD)

and

I/

1

simultaneously.

3. The message “MD” or “VIDEO”is displayed on the fluorescent

indicator tube, and the function of external input is changed
over.

This mode is used to unable to take sample disc out of tray in the
shop.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press the [CD] button to select “CD”.
3. Set disc on the CD tray, press two buttons of

x

and

Z

for 5

seconds.

4. The message “LOCKED” is displayed on the fluorescent

indicator tube and the CD tray is locked. (Even if pressing
the

Z

button, the message “LOCKED” is displayed on the

fluorescent indicator tube and the CD tray is locked)

5. To release from this mode, press two buttons of

x

and

Z

for

5 seconds.

6. The message “UNLOCKED” is displayed on the fluorescent

indicator tube and the CD tray is unlocked.

This mode is used to display the parameter of amplifier IC and
display the VACS status.
Procedure:

1. Press the

I/

1

button to turn the power on.

2. Press three buttons of

x

, [P FILE] and [PLAY MODE/TUNING

MODE] simultaneously.

3. When the AMP test mode is activated, the message “AMP

TEST IN” is displayed on the fluorescent indicator tube
momentarily, then amplifier adjustment mode is displayed on
the fluorescent indicator tube.

4. Press the [DISPLAY] button to changed over between VACS

status display mode and the amplifier IC parameter display
mode.

5. In the amplifier IC parameter display mode, press the [i-BASS]

button to changed over DBFB on/off, and when it is on, the
character “D” is displayed on the fluorescent indicator tube.

6. In the amplifier IC parameter display mode, press the

[SURROUND] button to changed over surround on/off, and
when it is on, the character “S” is displayed on the fluorescent
indicator tube.

7. In the amplifier IC parameter display mode, turn each knob of

[BASS], [MIDDLE] and [TREBLE] causes respective parameters
to be changed, as well as change-over of the display on the
fluorescent indicator tube.