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21

There are 31 types of test modes as shown below. The groups can be switched  .(R) ,  > (R) .  After selecting the group to be used. After
setting a certain group,  .(R) ,  > (R)  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.

TEMP CHECK

LDPWR CHECK

EF MO CHECK

EF CD CHECK

FBIAS CHECK

S curve 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

HEAD ADJUST

CPLAY2 MODE

CREC2 MODE

ADJ CLEAR

AG Set (MO)

AG Set (CD)

Iop Read

Iop Write

INFORMATION

CPLAY MODE

CREC MODE

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

(X)

(X)

(X)

(X) (!)

(X)

(X)

(X)

(X)

(X)

(X)

(X)

(X)

*)

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

• For details of each adjustment mode, refer to “6. Electrical Adjustments”.
• If a different mode has been selected by mistake, press the  MENU/NO (R) button 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 acciden-

tally, press the  MENU/NO (R) button 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

22

“CPLAY MID” 

n “CPLAY OUT” n “CPLAY IN”  

“CPLAY MID” 

n “CPLAY OUT” n “CPLAY IN”  

1. Entering the continuous playback mode

1

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

2

 Press the  .(R)  and  > (R)  buttons and display “CPLAY MODE”.

3

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

4

 When access completes, the display changes to “C1 = 

 AD = 

”.

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

2. Changing the parts to be played back

1

 Press the  ENTER/YES (R)  button 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 “C1 = 

 AD = 

”.

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

3. Ending the continuous playback mode

1

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

2

 Press the  MD Z  button 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

 Press the  .(R)  and  > (R)  buttons and display “CREC MODE”.

3

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

4

 When access completes, the display changes to “CREC (

)” and “REC” indicator lights up.

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

2. Changing the parts to be recorded

1

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

When pressed another time, the parts to be recorded can be changed. “REC” indicator goes off.
2

 When access completes, the display changes to “CREC (

)” and “REC” indicator lights up.

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

3. Ending the continuous recording mode

1

 Press the  MENU/NO (R)  button. The display changes to “CREC MODE” and “REC” indicator goes off.

2

 Press the  MD Z 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  MENU/NO (R)  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.

5-5-3. Non-Volatile Memory Mode (EEP MODE)
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 (R)  button immediately to exit it.

23

Mode display

Error rate display

Address display

Auto gain display (Not used in servicing)

Detrack check display (Not used in servicing)

IVR display (Not used in servicing)

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

Continuous recording.

Stops continuous playback and continuous recording.

The sled moves to the outer circumference only when this is pressed.

The sled moves to the inner circumference only when this is pressed.

Switches between the pit and groove modes when pressed.

Switches the spindle servo mode (CLV S 

˜ CLV A).

Switches the displayed contents each time the button is pressed

Ejects the disc

MD u

MD REC z

MD x

M

*

m

*

CLEAR (R)

PLAY MODE

DISPLAY (R)

MD 

Z

*

This function works only when the  MD x  button is pressed and “MD” is displayed. In other cases, it works everytime the MD x
button is pressed.

Each time the  DISPLAY (R)  button is pressed, the display changes in the following order.

1. Mode display
Displays “TEMP ADJUST”, “CPLAYMODE”, etc.

2. Error rate display
Displays the error rate in the following way.

C1 =         AD =   
C1 = Indicates the C1 error.
AD = Indicates ADER.

3. Address display
The address is displayed as follows. (MO:recordable disc, CD:playback only disc)
Pressing the  CLEAR  button switches between the groove display and pit display.
h =         s =         (MO pit and CD)
h =         a =         (MO groove)
h = Indicates the header address.
s = Indicates the SUBQ address.
a = Indicates the ADIP address.

Note: “–” is displayed when servo is not imposed.

4. Auto gain display (Not used in servicing)
The auto gain is displayed as follows.
AG =     /   

[OK]

5. Detrack check display (Not used in servicing)
The detrack is displayed as follows.
ADR =             

6. IVR display (Not used in servicing)
The IVR is displayed as follows.
[   ] [   ] [   ]

u/MD

*

u/MD

*

REC

SYNC

LEVEL-SYNC

OVER

1

REPEAT

TRACK

DISC

SHUFFLE

MONO

STOP (CLV: OFF) (Light off)

Tracking servo ON (Green)

Recording mode OFF

CLV normal mode

Tracking offset cancel OFF

Groove

Low reflection

CLV A

CLV UNLOCK

*

Differentiate MD 

u

 by the color of the button indicator.

During continuous playback

(CLV: ON) (Green)

Tracking servo OFF (Unber)

Recording mode ON

CLV low speed mode

ABCD adjustment completed

Tracking offset cancel ON

Tracking auto gain OK

Focus auto gain OK

Pit

High reflection

CLV S

CLV LOCK

24

• Check and adjust the MDM and MBU as follows.

The procedure changes according to the part replaced

• Abbreviation

OP

: Optical pick-up

OWH: Overwrite head

• Temperature compensation offset check
• Laser power check
• Traverse check
• Focus bias check
• C PLAY check
• Self-recording/playback check

Parts Replacement and Repair

NG

Has the OWH been replaced?

NO

OK

NO

NO

NO

Has OP, IC171, IC101, or 
IC121 been replaced?

YES

YES

Initial setting of the adjustment value

Has OP or IC171 been replaced?

YES

IOP information recording
(IOP value labeled on OP)

Has IC171 or D101 
been replaced?

YES

Temperature compensation offset adjustment

• Laser power adjustment
• Traverse adjustment
• Focus bias adjustment
• Error rate adjustment
• Focus bias check
• Auto gain adjustment

Check the sleding and spindle 
mechanisms. 
Other causes can be suspected.