CMT-DH30, HCD-DH30 - Sony Audio Service Manual (repair manual). Page 13

COLD  RESET
The cold reset clears all data including preset data stored in the 
RAM to initial conditions.
Procedure:
1.  Press the [

?/1

] button to turn on the system.

2.   Press three buttons of [

x

], [DISPLAY] and [

?/1

] simultane-

ously.

3.   The message “RESET” appears on the fl uorescent  indicator 

tube, and the system is reset.

PANEL  TEST  MODE
This mode is used to check the fl uorescent indicator tube, LEDs, 
keys, model, destination and software version. 
Procedure:
1.  Press three buttons of [

x

], [VOLUME –] and [DISPLAY] si-

multaneously.

2.  All LEDs and segments in fl uorescent indicator tube are light-

ed up.

3.  Press the [DISPLAY] button, the software version display 

mode is activated, and model and destination information ap-
pears on the fl uorescent indicator tube.

4. In the software version display mode, each time the 

[PROGRESSIVE] button is pressed, the display changes from 
MC version, MMLib version, Bolero version in this order, and 
returns to the model and destination information.

5.  Press the [DSGX] button, the key check mode is activated, 

“KEY 0 0 0” appears on the fl uorescent indicator tube. 

6.  In the key check mode, each time a button is pressed, the nu-

merical value corresponding to each button is displayed on the 
fl uorescent indicator tube.

7.  To release from this mode, press three buttons in the same 

manner as step 1 or disconnect the power cord.

TUNER  STEP  CHANGE
The step interval of AM channels can be toggled between 9 kHz 
and 10 kHz. This mode is not available for AEP and Russian mod-
els.
Procedure:
1.  Press the [

?/1

] button to turn on the system.

2.  Press the [TUNER/BAND] button to select the “AM”.
3.  Press the [

?/1

] button to turn off the system.

4.  Press two buttons of [TUNER/BAND] and [

?/1

] simultane-

ously. The system will turn on automatically. The message 
“AM 9k Step” or “AM 10k Step” appears on the fl uorescent 
indicator tube and thus the channel step is changed.

DISC  ANTITHEFT
This mode is used to lock the disc slot. When this mode is acti-
vated, the disc will not slot out when [

Z

] button is pressed. The 

message “LOCKED” appears on the fl uorescent indicator tube.
Procedure:
1.  Press the [

?/1

] button to turn on the system.

2.  Press the [DVD 

N

] button to select the “DVD”.

3.  Press two buttons of [

x

] and [

Z

] simultaneously and hold 

down until “LOCKED” or “UNLOCKED” appears on the 
fl uorescent indicator tube (around 5 seconds).

DVD  COLOR  SYSTEM
This mode let you change the color system of the video output 
from PAL to NTSC or vice-versa. This mode is not available for 
AEP and Russian models.
Procedure:
1.  Press the [

?/1

] button to turn on the system.

2.  Press the [DVD 

N

] button to select the “DVD”.

3.  Press the [

?/1

] button to turn off the system.

4.  Press two buttons of [

X

] and [

?/1

] simultaneously. The sys-

tem will turn on automatically. The message “COLOR PAL” 
or “COLOR NTSC” appears on the fl uorescent indicator tube.