CMT-M100MD, HCD-M10 - Sony Audio Service Manual (repair manual). Page 22

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• 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 customers.

Procedure:
1. Press  ?/1  button to turn the power on.
2. Press three buttons  x   ,  ENTER/START  and  ?/1  simultaneously.
3. The memory is reset, the power turns off and the DEMO program starts.

• This mode is used to check the software version, LCD, LED and keyboard.

Procedure:
1.

Press three bottons  x  ,  ENTER/START  and  FUNCTION  simultaneously.

2.

LEDs and LCD are all turned on.

2-1. Version check

1. When entering the software version display mode, press  REPEAT  butto .The model name (“M100”) and destination are displayed.
2. Each time  REPEAT  button is pressed, the display changes MC, GC, CD, CDD, CDMA,CDMB, BDA, BDB, ST, TA, TM, TC and

MD (returns to MC) in this order, and returns to the top of the version display.

3. When  REC MODE  button is pressed while the version numbers are being displayed, year, month and day of the software creation

appear. When  REC MODE  button is pressed again, the display returns to the software version display. When  REPEAT  button is
pressed while year, month and day of the software creation are being  displayed, the year, month and day of creation of the software
versions are displayed in the same order of version display.

2-2. Key check

1. Press  PLAYMODE   button, and the key check mode is activated. In the key check mode, the LCD displays “K 0 J 0 V 0”. Each time

a button is pressed, “K 0” value increases. However, once a button is pressed, it is no longer taken into account. It is end at “K21J 0V
0”

2. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-SM100E/provided with unit)  buttons. These
operations are indicated as “R” in this manual.
Example:

MENU/NO “R”

...Press the 

[MENU/NO]

 button of the remote commander.

Incorrect operations may be performed if the test mode is not entered properly.
In this case, press the ?

/1

button to turn the power off, and retry to enter the test mode.

Procedure:
1.

Press  ?/1  button to turn the power on.

2.

Press three buttons   x   ,   ENTER/START    and   TAPE  nN   simultaneously.

3.

The set goes to the key test mode and the   MD   and   TAPE    segments flash.

3-1. Amp Test Mode

1. In the common test mode, every time you press    BASS/TRE “R”     button, the following items changes in the order as shown below.

BASS/TRE MAX, VOL MAX

BASS/TRE MIN, VOL MAX

BASS/TRE FLAT, VOL MAX

2. When    VOLUME +  button  or   VOLUME + “R”  button  is pressed, VOLUME goes MAX.
3. When    VOLUME –  button  or   VOLUME – “R”   button  is pressed, VOLUME goes MIN.
4. To exit from this mode, press  ?/1  button and disconnect the power cord.

3-2. Tape Test

1. Check the set is in the common test mode.
2. Insert a recordable cassette tape.
3. Play back the recorded MD.
4. Press    z TAPE   button.
5. Select the recording direction with    TAPE  nN   button.
6. Press   X TAPE   button to start recording.
7. When  m “R”    or   M “R”    button against the tape recording direction is pressed, the tape returns to the recording started point

and the set starts playback.

8. To exit from this mode, press  ?/1  button and disconnect the power cord.