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17

1

2

3

1

3

2

4

5

A

5

7

4

6

1

3

2

Note:
Turn the optical pick-up
inside out, and pull out
the flexible board.

18

• As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is

stopped before setting and removing it.
Even if the  A  button (MD) is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not
stop rotating.
Therefore, it will be ejected while rotating.
Be sure to press the  A  button (MD) after pressing the  MENU/NO  button (MD) and the rotation of disc is stopped.

• Continuous recording mode (MD CREC MODE)
• Laser power check mode (MD LDPWR CHECK)
• Laser power adjustment mode (MD LDPWR ADJUST)
• Traverse (MO) check (MD EF MO CHECK)
• Traverse (MO) adjustment (MD EF MO ADJUST)
• When pressing the  z REC  button (MD).

The following are two methods of entering the test mode.
1. Rotate the  FUNCTION  knob (TA), and set the function to “MD” before hand. When the power OFF (STANDBY), press the  ?/1  button

(TA) while pressing the  s  button (MD) and  ENTER/YES  button (MD) together.

2. Press the  MENU/NO  button (MD), and when “MD Check” is displayed.
3. When the test mode is set, “MD [Check]” will be displayed. Rotate the  l L  knob (MD) switches between the following four

groups; ···

Tt MD Check Tt MD Adjust Tt MD Service Tt MD Develop Tt ···.

Press the  ?/1  button (TA). The disc is ejected when loaded, and “Standby” display blinks, and the STANDBY state is set.

All operations are performed using the  l L  knob (MD),  ENTER/YES  button (MD), and  MENU/NO  button (MD).
The functions of these buttons are as follows.

Function name

l L  knob (MD)

ENTER/YES  button (MD)

MENU/NO  button (MD)

Function

Changes parameters and modes

Proceeds onto the next step. Finalizes input.

Returns to previous step. Stops operations.

19

Display

MD TEMP CHECK

MD LDPWR CHECK

MD EF MO CHECK

MD EF CD CHECK

MD FBIAS CHECK

MD S curve CHECK

MD VERIFY MODE

MD DETRK CHECK

MD TEMP ADJUST

MD LDPWR ADJUST

MD EF MO ADJUST

MD EF CD ADJUST

MD FBIAS ADJUST

MD EEP MODE

MD MANUAL CMD

MD SVDATA READ

MD ERR DP MODE

MD SLED MOVE

MD ACCESS MODE

MD 0920 CHECK

MD HEAD ADJUST

MD CPLAY2 MODE

MD CREC2 MODE

MD ADJ CLEAR

MD AG Set (MO)

MD AG Set (CD)

MD Iop Read

MD Iop Write

MD INFORMATION

MD CPLAY MODE

MD CREC MODE

Contents

Temperature compensation offset check

Laser power check

Traverse (MO) check

Traverse (CD) check

Focus bias check

S letter check

Non-volatile memory check

Detrack check

Temperature compensation offset adjustment

Laser power adjustment

Traverse (MO) adjustment

Traverse (CD) adjustment

Focus bias adjustment

Non-volatile memory control

Command transmission

Status display

Error history display, clear

Sled check

Access check

Outermost circumference check

Head position check

Same functions as CPLAY MODE

Same functions as CREC MODE

Initialization of non-volatile memory of adjustment value

Auto gain output level adjustment (MO)

Auto gain output level adjustment (CD)

IOP data display

IOP data write

Microprocessing version display

Continuous play mode

Continuous recording mode

Mark

(

X

)

(

X

)

(

X

)

(X

) (!)

(

X

)

(

X

)

(X

)

(

X

)

(

X

)

(X

)

(

X

)

(

X

)

Group (

*

)

C

S

C

S

C

S

C

S

C

S

C

C

C

A

S

A

S

A

S

A

S

A

S

D

D

D

S

D

D

D

D

D

D

A

S

A

S

A

S

C

S

A

S

C

S

C

A

S

D

C

A

S

D

There are 31 types of test modes as shown below. The groups can be switched by rotating the  l L  knob (MD). After selecting the
group to be used, press the  ENTER/YES  button (MD). After setting a certain group, rotating the  l L  knob (MD) switches between
these modes.
Refer to “Group” in the table for details selected.
All items used for servicing can be treated using group S. So be carefully not to enter other groups by mistake.

• For details of each adjustment mode, refer to “5. Electrical Adjustments”.

For details of “ERR DP MODE”, refer to “Self-Diagnosis Function” on page 2.

• If a different mode has been selected by mistake, press the  MENU/NO  button (MD) to exit that mode.
• Modes with (

X

) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally,

press the  MENU/NO  button (MD) to exit the mode immediately. Be especially careful not to set the modes with (!) as they will overwrite
the non-volatile memory and reset it, and as a result, the unit will not operate normally.

Group (

*

)

C: Check
S: Service

A: Adjust
D: Develop

20

1. Entering the continuous playback mode

1

Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.)

2

Rotate the  l L  knob (MD) and display “MD CPLAY MODE”.

3

Press the  ENTER/YES  button (MD) to change the display to “MD CPLAY MID”.

4

When access completes, the display changes to “MD C = 

 AD = 

”.

Note : The numbers “ ” displayed show you error rates and ADER.

2. Changing the parts to be played back

1

Press the  ENTER/YES  button (MD) during continuous playback to change the display as below.

When pressed another time, the parts to be played back can be moved.

2

When access completes, the display changes to “MD C = 

 AD = 

”.

Note : The numbers “ ” displayed show you error rates and ADER.

3. Ending the continuous playback mode

1

Press the  MENU/NO  button (MD). The display will change to “MD CPLAY MODE”.

2

Press the  A  button (MD) to remove the disc.

Note : The playback start addresses for IN, MID, and OUT are as follows.

IN

40h cluster

MID 300h cluster
OUT 700h cluster

1. Entering the continuous recording mode

1

Set a recordable disc in the unit.

2

Rotate the  l L  knob (MD) and display “MD CREC MODE”.

3

Press the  ENTER/YES  button (MD) to change the display to “MD CREC MID”.

4

When access completes, the display changes to “MD CREC (

)”.

Note : The numbers “ ” displayed shows you the recording position addresses.

2. Changing the parts to be recorded

1

When the  ENTER/YES  button (MD) is pressed during continuous recording, the display changes as below.

When pressed another time, the parts to be recorded can be changed.

2

When access completes, the display changes to “MD CREC (

)”.

Note : The numbers “ ” displayed shows you the recording position addresses.

3. Ending the continuous recording mode

1

Press the  MENU/NO  button (MD). The display changes to “MD CREC MODE”.

2

Press the  A  button (MD) 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  MENU/NO  button (MD) 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  MENU/NO  button (MD) immediately to exit it.

“MD CPLAY MID” 

t “MD CPLAY OUT” t “MD CPLAY IN”  

“MD CPLAY MID” 

t “MD CPLAY OUT” t “MD CPLAY IN”