CMT-SPZ55, HCD-SPZ55 - Sony Audio Service Manual (repair manual). Page 10

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 [PLAY MODE/TUNING MODE], 

[DISPLAY] and [

I/1

] simultaneously.

2. The fl uorescent indicator tube becomes blank momentarily, 

then becomes standby states.

This mode is used to check operations of Amplifi er.
Procedure:  
1.  Press the [

I/1

] button to turn the power on.

2.  Press three buttons of [DSGX], [DISC SKIP/EX-CHANGE] 

and [DISPLAY] simultaneously.

3.  When the COMMON test mode is activated, “SLEEP” and 

c

 

PLAY  blink on the fl uorescent indicator tube.

4.  Each time [EQ] button is pressed, the display changes starting 

“TONE MIN”, “TONE FLAT” and “TONE MAX” this order.  

5.  Turn the [VOLUME] knob counterclockwise, “VOL MIN” is 

displayed on the fl uorescent indicator tube. Turn the [VOL-
UME] knob clockwise, “VOL MAX” is displayed on the fl uo-
rescent indicator tube.

6.  To release this mode, press the [

I/1

] button.

This mode is used to check the fl uorescent indicator tube, LED, 
model, destination, software version and key.
Procedure:
1.  Press the [

I/1

] button to turn the power on.

2.  Press three buttons of [PLAY MODE/TUNING MODE], 

[FUNCTION] and [DISPLAY] simultaneously.

3.  Fluorescent indicator tube is all turned on and each LED of 

[DSGX] and [STANDBY] blink every 0.5 seconds. 

4.  When you want to enter the model, destination and version 

display mode, press the [DISPLAY] button. The model and 
destination are displayed alternately on the fl uorescent indica-
tor tube.

5.  Press the [DISPLAY] button again MC version, display on the 

fl uorescent indicator tube.

6.  When [FUNCTION] button is pressed while the MC version 

is displayed, year, month and day of the software creation dis-
play. When [FUNCTION] button is pressed again, the display 
returns to the MC version display. 

7.  Press the [PUSH ENTER] button, the key check mode is acti-

vated.

8.  In the key check mode, the fl uorescent indicator tube displays 

“K 0 J0 V0”. 

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 “K25”.
10. “V” value increases 1, 2, 3 ... if turn the [VOLUME] knob 

clockwise, or it decreases 0, 9, 8 ... if turn the knob counter-
clockwise 

    “J” value increases like 1, 2, 3 ... if turn the jog knob clock-

wise, or it decreases like 0, 9, 8 ... if turn the knob counter-
clockwise.

11. To release this mode, press three keys in the same manner as 

step 2, or disconnect the power cord.

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 [FUNCTION] button to select  CD .
3.  Press two buttons of [PLAY MODE/TUNING MODE] and 

[DISC 1] simultaneously.

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

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

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

I/1

] button to turn the power on.

2.  Press the [FUNCTION] button to select “CD”.
3.  Press three buttons of [DSGX], [DISC SKIP/EX-CHANGE] 

and [DISC 1] simultaneously.

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

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

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

I/1

] button to turn the power on.

2.  Press the [FUNCTION] button to select “CD”.
3.  Press two buttons of [x] and [Z] for 5 seconds.
4.  The message “LOCKED” is displayed on the fl uorescent in-

dicator tube and the disc slot is locked. (Even if pressing the  
[Z] button, the message “LOCKED” is displayed on the fl uo-
rescent indicator tube and the disc table 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 fl uorescent 

indicator tube and the disc table 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 [

I/1

] button to turn the power on.

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

I/1

] button again to turn the power off.

4.  Press two buttons of [x] and [

I/1

] simultaneously.

5.  The message “CD POWER” is displayed on the fl uorescent 

indicator tube momentarily, then display changes “ON” or 
“OFF”, and CD power on/off changed over in the tuner mode.