Sony CX-LDB30, Service Manual

Page: 19 / 66

19
CX-LDB30/LDB50
[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 the
?
/
1
button to turn off the main power.
2. Press two buttons of
[AUDIO IN]
and
?
/
1
simultaneously for
more than two seconds.
3. The fluorescent indicator tube does not display any message
and the set is reset.
[COMMON TEST]
* This mode is used to check the function of the amplifier.
Procedure:
1. Press the
?
/
1
button to turn the set on.
2. Press two buttons of x and
[DISPLAY]
simultaneously for
more than two seconds.
3. The message “Volume MAX” is displayed, when the
[VOLUME]
knob is rotated clockwise. The message “Volume
MIN” is displayed, when the
[VOLUME]
knob is rotated
counterclockwise.
4. Each time the [BASS] or [TREBLE] knob is turned or Press the
[EQ]
button (RM), the message “TONE MAX”, “TONE MIN”
or “TONE FLAT” is displayed in this order.
[PANEL TEST]
* The panel test, the version, and inducing is displayed.
Procedure:
1. Press the ? / 1 button to turn off the main power.
2. Press two buttons of [AUDIO IN] and [DISPLAY] simultaneously
for more than two seconds.
3. All lighting display is done.
4. 4-1. To enter the test mode, press the button
[i-Bass]
simultaneously.
The version of the microcomputer is displayed.
4-2. To enter the key test mode, press the button
[PLAY MODE/
TUNING MODE]
simultaneously.
The version of the microcomputer is displayed.
5. Press two buttons of [AUDIO IN] and [DISPLAY] simultaneously
for more than two seconds, it ends.
[CD Repeat 5 Times Limit Release Mode]
Procedure:
1. Press the
?
/
1
button to turn the set on.
2. Select the FUNCTION to CD.
3. Press two buttons of
Z CD and
[PLAY MODE/TUNING MODE]
simultaneously for more than two seconds.
4. The repeat all mark blinks and then repeat 5 times limit is
released.
[CD Ship Mode and Memory clear]
* This mode moves the optical pick-up to the position durable
to vibration and Memory Clear. Use this mode when returning
the set to the customer after repair.
Procedure:
1. Press the
?
/
1
button to turn the set on.
2. Set the FUNCTION to CD.
3. Press two buttons of
Z CD and > simultaneously for
more than two seconds.
4. After a message “MECHA LOCK” is displayed on the
fluorescent indicator tube, the CD ship mode is set and the
power is turned off.
[Disc anti-theft]
Procedure:
1. Press the
?
/
1
button to turn the set on.
2. Set the FUNCTION to CD.
3. Press two buttons of
x and Z CD simultaneously for more
than five seconds.
4. Press two buttons of
x
and
Z
CD simultaneously for more
than five seconds to turn the set off.
[CD ERROR CODE]
Procedure:
1. Press the ? / 1 button to turn the set on.
2. Set the FUNCTION to CD.
3. Press two buttons of CD
u
and
[DISPLAY]
simultaneously
for more than two seconds.
4. Switch the CDM/NO DISC using > , . .
Advance the number using > , Reverse the number using
. .
[CD SERVICE MODE Mode]
* This mode can run the CD sled motor freely. Use this mode,
for instance, when cleaning the pickup.
Procedure:
1. Press the
?
/
1
button to turn the set on.
2. Set the FUNCTION to CD.
3. While depressing the CD
u button, Press the [i-Bass] button.
The message “SERVICE MODE” is displayed.
4. With the CD in stop status, press the
>
button to move the
pickup to outside track, or press the . button to inside
track.
5. When press the CD
u
button, normal playback is
performed.
6. Each time the CD u button is pressed during normal
playback, the tracking servo is switched on or off.
7. To exit this mode, either change to other functions or extract
an AC plug.
[AM Channel Step 9 kHz/10kHz Selection Mode]
* Either the 9 kHz step or 10 kHz step can be selected for the
AM channel step.
Procedure:
1. Turn on the power, and press the
[TUNER]
button to select the
AMP band.
2. Turn off the power.
3
Press the
>
button and the
?
/
1
button at the same time to
enter this mode.
SECTION 4
TEST MODE