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– 17 –

• A step of AM (MW) channels can be changed over between 9 kHz and 10 kHz.

Procedure:
1. Press  1/u  button to turn the set ON.
2. Select the function “TUNER”, and press  TUNER/BAND  button to select the BAND “AM (MW)”.
3. Press  1/u  button to turn the set OFF.
4. Press  FUNCTION  and  1/u  buttons simultaneously, and the display of fluorescent indicator tube changes to “AM (MW) 9 kHz STEP”

or “AM (MW) 10 kHz STEP”, and thus the channel step is changed over.

• A step of LW channels can be changed over between 1 kHz and 3 kHz.

Procedure:
1. Press  1/u  button to turn the set ON.
2. Select the function “TUNER”, and press  TUNER/BAND  button to select the BAND “LW”.
3. Press  1/u  button to turn the set OFF.
4. Press  FUNCTION  and  1/u  buttons simultaneously, and the display of fluorescent indicator tube changes to “LW 1 kHz STEP” or “LW

3 kHz STEP”, and thus the channel step is changed over.

Procedure:
1. Press  PLAY MODE  and  p (MD)  buttons simultaneously.
2. LEDs and fluorescent indiator tube are all turned on.
3. When the  FUNCTION  button is pressed, the fluorescent indicator tube lights up in the order of; partial lighting 1 n partial lighting 2 n

all lit n partial lighting 1 n ······.
When the  VOLUME  knob is rotated, the LED lighting pattern changes.
To end without switching to the key check mode, press the  1/u  button to turn off the power.

4. Press  p (CD)  button, and the key check mode is activated.
5. In the key check mode, the fluorescent indicator tube displays “KEY=0 JOG=0”. Each time a button is pressed, “KEY=” value increases.

However, once a button is pressed, it is no longer taken into account.
“JOG=” Value increases like 1, 2, 3 ... if rotating VOLUME knob in clockwise direction, or it decreases like 10, 9, 8 ... if rotating in
counterclockwise direction.

6. To exit from this mode, press order all buttons (15 buttons), the displays “KEY=OK”, and press any button, or disconnect the power cord.

Procedure:
1. Connect an oscilloscope to IC601 pin 

(¡ and ground of the MAIN board.

2. Press  PLAY MODE  and  p (MD)  buttons simultaneously, and the fluorescent indiator tube displays “32.768 kHz (91)”.
3. To check the signal on oscilloscope becomes 32 kHz square wave.
4. Press  1/u  button to exit.

– 18 –

• Continuous recording mode (CREC MODE)
• Traverse adjustment mode (EFBAL ADJUST)
• Laser power adjustment mode (LDPWR ADJUST)
• Laser power check mode (LDPWR CHECK)
• Traverse (MO) check (EF MO CHECK)
• Traverse (MO) adjustment (EF MO ADJUST)

With the power off, press the  ^ (MD)  button while pressing the  PLAY MODE  button.

Press the  REPEAT  button. The STANDBY state will be set and the test mode will be cleared.

All operations are performed using the  VOLUME  knob,  p (CD)  button, and  ^ (CD)  button.
The functions of these buttons are as follows.

Function name

VOLUME knob

p (CD) button

^ (CD) button

Function

Changes parameters and modes

Proceeds onto the next step. Finalizes input.

Returns to previous step. Stops operations.

– 19 –

There are altogether 26 test modes, shown in the following table. Rotating the  VOLUME  knob to the right switches to the mode below the
current mode in the table while rotating to the left switches to the mode above. Each time the  ^ (CD)  button is pressed, the display changes
in the following order;
“TEMP CHECK” n ”TEMP ADJUST” n ”SLED MOVE” n“TEMP CHECK”…

Display

TEMP CHECK

LDPWR CHECK

EF MO CHECK

EF CD CHECK

FBIAS CHECK

CPLAY MODE

CREC MODE

Scurve CHECK

VERIFY MODE

DETRK CHECK

TEMP ADJUST

LDPWR ADJUST

EF MO ADJUST

EF CD ADJUST

FBIAS ADJUST

EEP MODE

MANUAL CMD

SVDATA READ

ERR DP MODE

SLED MOVE

ACCESS MODE

0920 CHECK

WRITE sure?

HEAD ADJUST

CPLAY2 MODE

CREC2 MODE

Ver @@@@@

Contents

Temperature compensation offset check

Laser power check

Traverse (MO) check

Traverse (CD) check

Focus bias check

Continuous playback mode

Continuous recording mode

S curve check

Non-volatile memory check

Detrack check

Temperature compensation offset adjustment

Laser power adjustment

Traverse (MO) adjustment

Traverse (CD) adjustment

Focus bias adjustment

Nonvolatile memory control

Command transfer

Status display

Error history display, clear

Sled check

Access check

Outermost circumference check

Non-volatile memory Initialize

Head position check

Continuous playback mode

Continuous recording mode

Microprocessor version display

Mark

(

X

)

(

X

)

(

X

)

(X

) (!)

(

X

)

(

X

)

(X

)

(

X

)

(

X

)

(X

) (!)

(

X

)

(

X

)

(

X

)

• For details of each adjustment mode, refer to the items in “6. Electrical Adjustments”. For details of “ERR DP MODE”, refer to the self-

diagnosis function on page 2.

• If other modes are set accidentally, press the  ^ (CD)  button to exit that mode.
• As items marked (

X

) in the “Mark” column are not used during servicing, they are not described here. If these modes are set accidentally,

press the  ^ (CD)  button to exit the mode. Be especially careful with items marked (!) as they will overwrite the non-volatile memory,
and as a result, the unit will not operate normally.

1. Entering the continuous playback mode

1 Set the disc in the unit. (Recordable discs or discs for playback only.)

2 Rotate the  VOLUME  knob and display “CPLAY MODE”.
3 Press the  p (CD)  button to change the display to “CPLAY MID”.
4 When access completes, the display changes to “C = 

 AD = 

”.

Note : The numbers “ ” displayed indicate the error rates and “ADER”.

2. Changing the part to be played back

1 When the  p (CD)  button is pressed during continuous playback, the display changes as below, and the played back part can be

changed.

2 When access completes, the display changes to “C1 = 

 AD = 

”.

Note : The numbers “ ” displayed indicate the error rate and “ADER”.

“CPLAY MID” n “CPLAY OUT” n “CPLAY IN”  

– 20 –

Contents

Sets continuous playback when pressed in the STOP state. Turns ON/OFF the tracking servo when pressed during continuous

playback.

Stops the continuous playback and recording.

Moves the sled to the external circumference only while the button is pressed.

Moves the sled to the internal circumference only while the button is pressed.

Switches between pit and groove when pressed.

Switches the displayed contents when pressed.

Ejects the disc.

Exits the test mode.

Function

·P

p

) +

= 0

CD-MD SYNC

1/u

6 (MD)

REPEAT

“CPLAY MID” n “CPLAY OUT” n “CPLAY IN”  

3. Ending the continuous playback mode

1 Press the  ^ (CD)  button. The display changes to “CPLAY MODE”.
2 Press the  6 (MD)  button to remove the disc.
Note : The playback start addresses for IN, MID, and OUT are as follows. To display the playback position address on the display, press

the  1/u  button to display “CPLAY (

)”.

IN:

40h cluster

MID: 300h cluster
OUT: 700h cluster

1. Entering the continuous recording mode

1 Set a recordable disc in the unit. (Refer to Note 3.)
2 Rotate the  VOLUME  knob and display “CREC MODE”.

3 Press the  p (CD)  button to change the display to “CREC MID”.
4 When access completes, the display changes to “CREC (

)” and the  

  display lights up.

Note : The numbers “ ” displayed indicate the recording position address.

2. Changing the part to be recorded

1 When the  p (CD)  button is pressed during continuous recording, the display changes as below and the recorded part can be changed.

The  

  display is off while changing.

2 When access completes, the display changes to “CREC MODE” and the  

  display lights up.

Note : The numbers “ ” displayed indicate the recording position address.

3. Ending the continuous recording mode

1 Press the  ^ (CD)  button. The display changes to “CREC (

)”, and the  

  display lights up.

2 Press the  6 (MD)  button to remove the disc.
Note 1 : The recording start addresses for IN, MID, and OUT are as follows.

IN:

40h cluster

MID:

300h cluster

OUT: 700h cluster

Note 2 : The  ^ (CD)  button can be used to stop recording anytime.
Note 3 : Do not perform continuous recording for long periods of time above 5 minutes.
Note 4 : During continuous recording, be careful not to apply vibration.

This mode reads and writes the contents of the non-volatile memory.
It is not used in servicing. If set accidentally, press the  ^ (CD)  button immediately to exit it.