HCD-EC68, HCD-EC78, MHC-EC68, MHC-EC78 - Sony Audio Service Manual (repair manual). Page 14

The cold reset clears all data including preset data stored in the 
memory to initial conditions. Execute this mode when returning 
the set to the customer.
Procedure:
1.  In the standby status, press the [

I/1

] button to turn the power 

on.

2.  Press three buttons of [

x

], [FUNCTION] and at last [

I/1

] si-

multaneously.

3.  When “RESET” appears, the set enters standby status.

Enter The Panel Test Mode
Procedure:
1.  In the standby status, press the [

I/1

] button to turn the power 

on.

2.  Press three buttons of [DISPLAY], [

x

], and [FUNCTION] si-

multaneously.

3.  When the panel test mode is activated, LEDs and segments of 

the liquid crystal display are all turned on.

Version Check
Procedure:
1.  In the panel test mode (all LEDs and segments of the liquid 

crystal display are turned on), press the [FUNCTION] button.

2.  On the liquid crystal display, date and version are displayed 

“xxxxxxxx”. For example, “1114V102”.

3.  From this status, press the [

X

] button, and the destination and 

model name are displayed. For example, “CE2” and “ESLO–
”

4.  To release from this mode, press three buttons of [DISPLAY], 

[

x

], and  [FUNCTION] simultaneously.

Key Test Mode
Procedure:
1.  In the panel test mode (all LEDs and segments of the liquid 

crystal display are turned on), press the [DISPLAY] button.

2.  The message “KEY0 0 0”displayed. Whenever any buttons 

are pressed and the [VOLUME] dial is turned, the value is 
changed.

3.  To release from this mode, press three buttons of [DISPLAY], 

[

x

], and [FUNCTION] simultaneously.

Number of repeats for CD playback is 5 times when the repeat 
mode is “REPEAT”. This mode enables CD to repeat playback for 
limitless times.
Procedure:
1.  Press the [

I/1

] button to turn the power on.

2.  Press the [FUNCTION] button to select CD function.
3.  Press three buttons of [DISPLAY], [

x

], and [l m – TUN-

ING] simultaneously. 

4.  It enters the CD repeat 5 limit cancel mode and displays “NO 

LIMIT”

5.  To release this mode, press the [

I/1

] button to turn the power off.

This mode can run the CD sled motor optionally. Use this mode, 
for instance, when cleaning the optical pick-up.
Procedure:
1.  Press the [

I/1

] button to turn the power on.

2. Confi rm there is no disc in all trays.
3.  Press the [FUNCTION] button to select CD function.
4.  Press two buttons of [CD N] and [

I/1

] simultaneously.

5.  Set to the CD ship mode. (chucking on)
6.  After blink “STANDBY”, “LOCK” is displayed, disconnect 

the AC plug.

This mode is for the antitheft of CD disc in shop. (not for trans-
port)
Procedure:
1.  Press the [

I/1

] button to turn the power on.

2.  Press the [FUNCTION] button to select CD function.
3.  Insert a disc.
4.  While pressing the [

x

] button, press the [

Z

] button for more 5 

seconds.

5.  The message “LOCKED” is displayed and the disc tray is 

locked. (Even if exiting from this mode, the disc tray is still 
locked)

6.  If press the [

Z

] button to eject the disc, the message “LOCKED” 

is displayed and can not eject the disc.

7.  To release this lock, while pressing the [

x

] button, press the

[

Z

] button for 5 seconds again.

8.  The message “UNLOCKED” is displayed and the disc tray is 

unlocked.

This mode is for switch the CD power supply on/off. Even if this 
state pulls out AC plug, it is held.
Procedure:
1.  Press the [

I/1

] button to turn the power on.

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

I/1

] button again to turn the power off (standby).

4.  After pressing the [DISPLAY] button, while pressing the [

x

] 

button, press the [

I/1

] button.

5.  It turns power on and display “CD POWER”, then display 

“ON” or “OFF”.

(Except EC68: AEP, UK and Russian/EC78: AEP and 
Russian models)
The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1.  Press the [

I/1

] button to turn the power on.

2.  Press the [TUNER/BAND] button to select TUNER (AM) 

function.

3.  Press the [

I/1

] button again to turn the power off (standby).

4.  After pressing the [DISPLAY] button, while pressing the 

[TUNING + M L] button, press the [

I/1

] button.

5.  It turns power on and display “9k STEP” or “10k STEP”, and 

thus the tuning interval is changed over.

Procedure:
1.  Press the [

I/1

] button to turn the power on.

2. Confi rm there is no disc in all trays.
3.  Press the [FUNCTION] button to select CD function.
4.  Press three buttons of [PLAY MODE/TUNING MODE], 

 

[l m – TUNING] and [

I/1

] simultaneously.

5.  After blink “STANDBY”, “RESET” is displayed, disconnect 

the AC plug.

Procedure:
1.  Press the [

I/1

] button to turn the power on.

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

[TUNING + M L], and [DISPLAY] simultaneously.

3.  It enters the common test mode and displays “COMMON”.
4.  Each time the [VOLUME] dial is turned, “VOL MIN”, “VOL 

16”, and “VOL MAX” are displayed

5.  To release from this mode, press three buttons of [PLAY 

MODE/TUNING MODE], [TUNING + M L], and [DIS-
PLAY] simultaneously.