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25

Note:
Mode which sets the adjustment results recorded in the non-volatile
memory to the initial setting value. However the results of the
temperature compensation offset adjustment will not change to the
initial setting value.
If initial setting is performed, perform all adjustments again
excluding the temperature compensation offset adjustment.
For details of the initial setting, refer to “5-4. Precautions on
Adjustments” and execute the initial setting before the adjustment
as required.

Setting Procedure :
1. Press the  

+  button to display “ADJ CLEAR”.

2. Press the  

^ “PROGRAM”  button. “Complete!” will be dis-

played momentarily and initial setting will be executed, after
which “ADJ CLEAR” will be displayed.

The IOP data can be recorded in the non-volatile memory. The IOP
value on the label of the optical pickup and the IOP value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.

Recording Procedure :
1. While pressing the  INPUT  button and  

p  button, connect the

power plug to the outlet, and release the  INPUT  button and  

p

button.

2. Press the  

+  button to display “[Service]”, and press the  ^

“PROGRAM”  button.

3. Rotate the  

+  button to display “Iop.Write”, and press the

^ “PROGRAM”  button.

4. The display becomes Ref=@@@.@ (@ is an arbitrary number)

and the numbers which can be changed will blink.

5. Input the IOP value written on the optical pick-up.

To select the number : Press the  

= ,  +  buttons.

To select the digit : Press the  

r “PROGRAM”  knob

6. When the  

^ “PROGRAM”  button is pressed, the display

becomes “Measu=@@@.@” (@ is an arbitrary number).

7. As the adjustment results are recorded for the 6 value. Leave it

as it is and press the  

^ “PROGRAM”  button.

8. “Complete!” will be displayed momentarily. The value will be

recorded in the non-volatile memory and the display will become
“Iop Write”.

Display Procedure :
1. Press the  

+  button to display “Iop.Read”.

2. “@@.@/##.#” is displayed and the recorded contents are

displayed.
@@.@ indicates the Iop value labeled on the pick-up.
##.# indicates the Iop value after adjustment

3. To end, press the 

r “PROGRAM”  button or  p “PROGRAM”

button to display “Iop Read”.

Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note :
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to

28 ˚C. Perform it immediately after the power is turned on when
the internal temperature of the unit is the same as the ambient
temperature of 22 ˚C to 28 ˚C.

3. When D101 has been replaced, perform this adjustment after

the temperature of this part has become the ambient tempera-
ture.

Adjusting Procedure :
1. Press the  

+  button and display “TEMP ADJUST”.

2. Press the  

^ “PROGRAM”  button and select the “TEMP

ADJUST” mode.

3. “TEMP = 

[OK]” and the current temperature data will be

displayed.

4. To save the data, press the  

^ “PROGRAM”  button.

When not saving the data, press the  

p “PROGRAM”  button.

5. When the  

^ “PROGRAM”  button is pressed, “TEMP = 

SAVE” will be displayed and turned back to “TEMP ADJUST”
display then. When the  

p “PROGRAM”  button is pressed,

“TEMP ADJUST” will be displayed immediatelly.

The “TEMP =  

” should be within “E0 - EF”, “F0 - FF”, “00 -

0F”,  “10 - 1F” and “20 - 2F”.

Check the IOP value of the optical pick-up before adjustments.
(Refer to 5-8. Recording and Displaying IOP Information.)

Adjusting Procedure :
1. Set the laser power meter on the objective lens of the optical

pick-up. (When it cannot be set properly, press the  

= “PRO-

GRAM”  button or  

+ “PROGRAM”  button to move the

optical pick-up.)
Connect the digital volt meter to CN110 pin 5 (I+3V) and
CN110 pin 4 (IOP).

2. Press the  

+  button and display “LDPWR ADJUST”.

(Laser power : For adjustment)

3. Press the  

^ “PROGRAM”  button once and display “LD 0.9

mW $ 

”.

4. Press the  

= ,  +  buttons so that the reading of the laser

power meter becomes 0.85 to 0.91 mW. Press the  

^ “PRO-

GRAM”  button after setting the range knob of the laser power
meter, and save the adjustment results. (“LD SAVE $ 

” will

be displayed for a moment.)

5. Then “LD 7.0 mW $ 

” will be displayed.

Laser power
meter

Optical pick-up
objective lens

Digital volt meter

BD board

CN110 pin 

5

 (I+3V)

CN110 pin 

4

 (IOP)

26

6. Press the  

= ,  +  buttons so that the reading of the laser

power meter becomes 6.9 to 7.1 mW, press the  

^ “PRO-

GRAM”  button and save it.

Note : Do not perform the emission with 7.0 mW more than 15

seconds continuously.

7. Then, press the  

+  button and display “PWR CHECK”.

8. Press the  

^ “PROGRAM”  button once and display “0.9

mW*** $ 

”. Check that the reading of the laser power meter

become 0.85 to 0.91 mW. (*** means IOP value)

9. Press the  

^ “PROGRAM”  button once more and display

“7.0 mW*** $ 

”. Check that the reading the laser power meter

and digital volt meter satisfy the specified value.
Note down the digital voltmeter reading value.

Laser power meter reading : 7.0 ± 0.1 mW
Digital voltmeter reading : Optical pick-up displayed value ± 10%

(Optical pick-up label)

10. Press the  

p “PROGRAM”  button and display “LDPWR

CHECK” and stop the laser emission.
(The  

p “PROGRAM”  button is effective at all times to stop

the laser emission.)

11. Press the  

+  button to display “Iop.Write”.

12. Press the  

^ “PROGRAM”  button. When the display be-

comes Ref=@@@.@ (@ is an arbitrary number), press the  

^

“PROGRAM”  button to display “Measu=@@@.@” (@ is an
arbitrary number).

13. The numbers which can be changed will blink. Input the Iop

value noted down at step 9.
To select the number : Press the  

= ,  +  buttons.

To select the digit : Press the  

r “PROGRAM”  buttan

14. When the  

^ “PROGRAM”  button is pressed, “Complete!”

will be displayed momentarily. The value will be recorded in
the non-volatile memory and the display will become “Iop
Write”.

Note 1: After step 4, each time the  

^ “PROGRAM”  button is

pressed, the display will be switched between “0.7 mW***
$ 

”, “6.2 mW*** $ 

”, and “ WP              *** $ 

”.

Nothing needs to be performed here.

Adjusting Procedure :
1. Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin

1 (VC) of the BD board.

2. Load a disc (any available on the market). (Refer to Note 1.)
3. Press the  

+ “PROGRAM”  button and move the optical pick-

up outside the pit.

4. Press the  

+  button and display “EF MO ADJUST”.

5. Press the  

+ button and display “EFB =   MO-R”.

(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)

6. Press the  

+  button so that the waveform of the oscilloscope

becomes the specified value.
(When the  

= ,  +  buttons is pressed, the   of “EFB=  ”

changes and the waveform changes.) In this adjustment, wave-
form varies at intervals of approx. 2%. Adjust the waveform so
that the specified value is satisfied as much as possible.
(Read power traverse adjustment)

(Traverse Waveform)

7. Press the  

^ “PROGRAM”  button and save the result of ad-

justment to the non-volatile memory (“EFB = 

 SAVE” will be

displayed for a moment. Then “EFB = 

 MO-W” will be dis-

played).

8. Press the  

= ,  +  buttons so that the waveform of the

oscilloscope becomes the specified value.
(When the  

= ,  +  buttons is pressed, the   of “EFB-  ”

changes and the waveform changes.) In this adjustment, wave-
form varies at intervals of approx. 2%. Adjust the waveform so
that the specified value is satisfied as much as possible.
(Write power traverse adjustment)

(Traverse Waveform)

9. Press the  

^ “PROGRAM”  button, and save the adjustment

results in the non-volatile memory. (“EFB = 

 SAVE” will be

displayed for a moment.)

10. “EFB = 

 MO-P”. will be displayed.

The optical pick-up moves to the pit area automatically and servo
is imposed.

V : 0.5 V/div
H : 10 ms/div
Input : DC mode

Oscilloscope

BD board

CN110 pin 

3

 (TE)

CN110 pin 

1

 (VC)

VC

A

B

Specification A = B

VC

A

B

Specification A = B

KMS

260A

27X40
B0825

N

Iop = 82.5 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 (

Ω

)

(For details of the method for checking
this value, refer to “5-8. Recording and
Displaying IOP Information”.)

27

11. Press the  

= ,  +  buttons until the waveform of the oscil-

loscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.

(Traverse Waveform)

12. Press the  

^ “PROGRAM”  button, and save the adjustment

results in the non-volatile memory. (“EFB = 

 SAVE” will be

displayed for a moment.)
Next “EF MO ADJUST” is displayed. The disc stops rotating
automatically.

13. Press the  

6 (EJECT)  button and remove the disc.

14. Load the check disc (MD) TDYS-1.
15. Press  

+  button and display “EF CD ADJUST”.

16. Press the  

^ “PROGRAM”  button and display “EFB = 

CD”. Servo is imposed automatically.

17. Press the  

= ,  +  buttons so that the waveform of the

oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.

(Traverse Waveform)

18. Press the  

^ “PROGRAM”  button, display “EFB =   SAVE”

for a moment and save the adjustment results in the non-vola-
tile memory.
Next “EF CD ADJUST” will be displayed.

19. Press the  

6 (EJECT)  button and remove the check disc (MD)

TDYS-1.

Note 1 : MO reading data will be erased during if a recorded disc is

used in this adjustment.

Note 2 : If the traverse waveform is not clear, connect the oscillo-

scope as shown in the following figure so that it can be
seen more clearly.

Adjusting Procedure :
1. Load a test disk (MDW-74/AU-1).
2. Press the  

+  button and display “CPLAY MODE”.

3. Press the  

^ “PROGRAM”  button and display “CPLAY MID”.

4. Press the  

p “PROGRAM”  button when “C1 = 

 AD = 

”

is displayed.

5. Press the  

+  button and display “FBIAS ADJUST”.

6. Press the  

p “PROGRAM”  button and display “ 

/

 a =

”.

The first four digits indicate the C1 error rate, the two digits
after “/” indicate ADER, and the 2 digits after [a =] indicate the
focus bias value.

7. Press the  

+  button and find the focus bias value at which the

C1 error rate becomes about 200 (Refer to Note 2).

8. Press the  

^ “PROGRAM”  button and display “ 

/

 b =

”.

9. Press the  

=  button direction and find the focus bias value at

which the C1 error rate becomes about 200.

10. Press the  

^ “PROGRAM”  button and display “ 

/

 c =

”.

11. Check that the C1 error rate is below 50 and ADER is 00. Then

press the  

^ “PROGRAM”  button.

12. If the “(

)” in “

 - 

 - 

 (

)” is above 20, press the  

p

“PROGRAM” button.
If below 20, press the  

p “PROGRAM”  button and repeat the

adjustment from step 2.

13. Press the  

6 (EJECT)  button to remove the test disc.

Note 1 : The relation between the C1 error and focus bias is as

shown in the following figure. Find points a and b in the
following figure using the above adjustment. The focal
point position C is automatically calculated from points a
and b.

Note 2 : As the C1 error rate changes, perform the adjustment us-

ing the average vale.

VC

A

B

Specification A = B

VC

A

B

Specification A = B

330 k

Ω

Oscilloscope

10pF

BD board

CN110 pin 

3

 (TE)

CN110 pin 

1

 (VC)

C1 error

about 
200

b

c

a

Focus bias value
(F. BIAS)

28

Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Press the  

+  button and display “CPLAY MODE”.

3. Press the  

^ “PROGRAM”  button twice and display “CPLAY

MID”.

4. The display changes to “C1 = 

 AD = 

”.

5. Check that the C1 error rate is below 20.
6. Press the  

p “PROGRAM”  button, stop playback, press the   6

(EJECT)  button, and remove the test disc.

Checking Procedure :
1. Load a test disc (MDW-74/AU-1).
2. Press the  

+  button and display “CPLAY MODE”.

3. Press the  

^ “PROGRAM”  button and display “CPLAY MID”.

4. The display changes to “C = 

 AD = 

”.

5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the  

p “PROGRAM”  button, stop playback, press the  6

(EJECT)  button, and remove the test disc.

Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a test disc (MDW-74/AU-1).
2. Press the  

+  button and display “CPLAY MODE”.

3. Press the  

^ “PROGRAM”  button twice and display “CPLAY

MID”.

4. Press the  

p “PROGRAM”  button when “C1 = 

 AD = 

”

is displayed.

5. Press the  

+  button and display “FBIAS CHECK”.

6. Press the  

^ “PROGRAM” button and display “ 

/

 c =

”.

The first four digits indicate the C1 error rate, the two digits
after “/” indicate ADER, and the 2 digits after “c =” indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is below 2.

7. Press the  

^ “PROGRAM”  button and display “ 

/

 b =

”.

Check that the C1 error is below 220 and ADER is below 2.

8. Press the  

^ “PROGRAM”  button and display “ 

/

 a =

”.

Check that the C1 error is below 220 and ADER is below 2

9. Press the  

p “PROGRAM”  button, next press the  6 (EJECT)

button, and remove the continuously recorded disc.

Note 1 : If the C1 error and ADER are above other than the speci-

fied value at points a (step 8. in the above) or b (step 7. in
the above), the focus bias adjustment may not have been
carried out properly. Adjust perform the beginning again.

Be sure to perform this adjustment when the pickup is replaced.
If the adjustment results becomes “Adjust NG!”, the pickup may be
faulty or the servo system circuits may be abnormal.

Adjusting Procedure :
1. Insert the check disc (MD) TDYS-1.
2. Press the  

+  button to display “AG Set (CD)”.

3. When the  

^ “PROGRAM”  button is pressed, the adjustment

will be performed automatically.
“Complete!!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (CD)”.

4. Press the  

6 (EJECT)  button to remove the disc.

Adjusting Procedure :
1. Insert the reference disc (MDW-74/AU-1) for recording.
2. Press the  

+  button to display “AG Set (MO)”.

3. When the  

^ “PROGRAM”  button is pressed, the adjustment

will be performed automatically.
“Complete!!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (MO)”.

4. Press the  

6 (EJECT)  button to remove the disc.