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31

Mode which sets the adjustment results recorded in the non-volatile
memory to the initial setting value. However the results of the tempera-
ture 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 “5-5. Precautions for Adjustments”
and execute the initial setting before the adjustment as required.

Setting Procedure:
1. Click the 

[JOG UP]

  or 

[JOG  DOWN]

 to display “ADJ

CLEAR”  (C28).

2. Click the 

[ENTER/YES]

. “Complete!” will be displayed mo-

mentarily and initial setting will be executed, after which “ADJ
CLEAR” (C28) will be displayed.

The Iop data can be recorded in the non-volatile memory. The Iop
value on the optical pick-up label and the Iop value after the ad-
justment will be recorded. Recording these data eliminates the need
to read the label on the optical pick-up.

Recording Procedure:
1. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “Iop Write”

(C05), and click the 

[ENTER/YES]

.

2. The display becomes “Ref=@@@.@” (@ is an arbitrary num-

ber) and the numbers which can be changed will blink.

3. Input the Iop value on the optical pick-up label.

To select the number : Click the 

[JOG UP]

  or 

[JOG DOWN]

.

To select the digit : Click the 

[PUSH]

.

4. When the

[ENTER/YES]

 is clicked, the display becomes

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

5. As the adjustment results are recorded for the 4 value. Leave it

as it is and click the 

[ENTER/YES]

.

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

be recorded in the non-volatile memory and the display will
become “Iop Write” (C05).

Display Procedure:
1. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “Iop Read”

(C26), and click the 

[ENTER/YES]

.

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

played.
@@.@ indicates the Iop value on the optical pick-up label.
##.# indicates the Iop value after adjustment

3. To end, click the 

[PUSH]

 or 

[MENU/NO]

 to display “Iop Read”

(C26).

Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.

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 tem-

perature of this part has become the ambient temperature.

Adjusting Procedure:
1. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “TEMP AD-

JUST” (C03).

2. Click the 

[ENTER/YES]

 to select the “TEMP ADJUST” mode.

3. “TEMP = 

 [OK” and the current temperature data will be

displayed.

4. To save the data, click the 

[ENTER/YES]

.

When not saving the data, click the 

[MENU/NO]

.

5. When the 

[ENTER/YES]

 is clicked, “TEMP = 

 SAVE” will

be displayed and turned back to “TEMP ADJUST” (C03) dis-
play then. When the 

[MENU/NO]

 is clicked, “TEMP ADJUST”

(C03) will be displayed immediately.

Specified Value:
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 5-9. 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, click the 

[FF]

    or

[FR]

 to move the optical pick-up)

Connect the digital voltmeter to CN105 pin 1 (I+3V) and
CN105 pin 2 (Iop) on the BD (MD) board.

2. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “LDPWR

ADJUST” (C04).
(Laser power : For adjustment)

3. Click the 

[ENTER/YES]

 once to display “L 0.90 mW $ 

”.

4. Click the 

[JOG UP]

  or 

[JOG DOWN]

 so that the reading of

the laser power meter becomes specified value. Click the

[ENTER/YES]

 after setting the range knob of the laser power

meter, and save the adjustment results. (“LD SAVE $ 

” will

be displayed for a moment)

Specified Value:
Laser power meter reading: 0.85 to 0.91 mW (KMS-262A)

0.90 to 0.95 mW (KMS-262E)

5. Then “L 8.40 mW $ 

” (KMS-262A) or “L 8.65 mW $ 

”

(KMS-262E) will be displayed.

Optical pick-up
objective lens

laser
power meter

+
–

BD board

digital voltmeter

CN105 pin 

1

 (I +3 V)

CN105 pin 

2

 (Iop)

32

6. Click the 

[JOG UP]

  or 

[JOG DOWN]

 so that the reading of

the laser power meter becomes specified value, click the

[ENTER/YES]

 to save it.

Specified Value:
Laser power meter reading: 8.2 to 8.6 mW (KMS-262A)

8.5 to 8.8 mW (KMS-262E)

Do not perform the emission with 8.4 mW more than 15 seconds
continuously.

7. Then, click the 

[JOG  UP]

 or 

[JOG  DOWN]

 to display

“LDPWR CHECK” (C13).

8. Click the 

[ENTER/YES]

 once to display “L 0.90 mW $ 

”.

Check that the reading of the laser power meter become speci-
fied value.

Specified Value:
Laser power meter reading: 0.84 to 0.92 mW (KMS-262A)

0.90 to 0.96 mW (KMS-262E)

9. Click the  

[ENTER/YES]

 button once more to display “L 8.40

mW $ 

” (KMS-262A) or “L 8.65 mW $ 

” (KMS-262E).

Check that the reading the laser power meter and digital volt-
meter satisfy the specified value.
Note down the digital voltmeter reading value.

Specified Value:
Laser power meter reading : 8.4 

±

 0.3 mW (KMS-262A)

8.65 

±

 0.25 mW (KMS-262E)

Digital voltmeter reading : Value on the optical pick-up label

±

10%

(Optical pick-up label)

10. Click the 

[MENU/NO]

 to display “LDPWR CHECK” (C13)

and stop the laser emission.
(The 

[MENU/NO]

 is effective at all times to stop the laser

emission.)

11. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “Iop Write”

(C05).

12. Click the 

[ENTER/YES]

. When the display becomes

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

[ENTER/YES]

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 : Click the 

[JOG UP]

  or 

[JOG DOWN]

.

To select the digit : Click the 

[PUSH]

.

14. When the 

[ENTER/YES]

 is clicked, “Complete!” will be dis-

played momentarily. The value will be recorded in the non-
volatile memory and the display will become “Iop Write”
(C05).

After step 4, each time the 

[ENTER/YES]

 is clicked, the display

will be switched “L 0.70 mW $ 

” and “LD 7.50 mW $ 

”.

Nothing needs to be performed here.

Adjustment Location: BD board (see page 35)

Adjusting Procedure:
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105

pin 6 (VC) on the BD board.

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

[STOP]

  after the 

[FF]

 clicked to move the optical

pick-up outside the pit.

4. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “EF MO

ADJUST” (C07).

5. Click the 

[ENTER/YES]

 to display “EFB = 

 MO-R”.

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

6. Click the 

[JOG UP]

  or 

[JOG DOWN]

 so that the waveform

of the oscilloscope becomes the specified value.
(When the 

[JOG UP]

  or 

[JOG DOWN]

 is clicked, the 

 of

“EFB= 

” changes and the waveform changes.) In this ad-

justment, waveform 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

Data will be erased during MO reading if a recorded disc is
used in this adjustment.

If the traverse waveform is not clear, connect the oscilloscope
as shown in the following figure so that it can be seen more
clearly.

+
–

oscilloscope

(DC range)

10 pF

330 k 

Ω

CN105 pin 

4

 (TE)

CN105 pin 

6

 (VC)

BD board

+
–

oscilloscope

(DC range)

V: 0.1 V/div
H: 10 ms/div

BD board

CN105 pin 

4

 (TE)

CN105 pin 

6

 (VC)

A

B

VC

Specification A = B

Write the reference values in the nonvolatile memory to perform
“Iop compare”. As this involves rewriting the reference values, do
not perform this procedure except when adjusting the laser power
during replacement of the optical pick-up and when replacing the
IC102. Otherwise the optical pick-up check may deteriorate.

Perform this function with the optical pick-up set at room tempera-
ture.

Procedure:
1. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “Iop NV Save”

(C06).

2. Click the 

[ENTER/YES]

 and display “Iop [stop]”.

3. After the display changes to “Iop =xxsave?”, click the 

[ENTER/YES]

.

4. After “Complete!” is displayed momentarily, the display changes

to “Iop 8.4 mW”.

5. After the display changes to “Iop=yysave?”, click the 

[ENTER/YES]

.

6. When “Complete!” is displayed, it means that Iop NV saving

has been completed.

KMS

262A

20101
B0825

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 “8.
Recording and Displaying the Iop
Information”.)

33

8. Click the 

[JOG UP]

  or 

[JOG DOWN]

 so that the waveform

of the oscilloscope becomes the specified value.
(When the 

[JOG UP]

  or 

[JOG DOWN]

 is clicked, the 

 of

“EFB= 

” changes and the waveform changes.) In this ad-

justment, waveform 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. Click the 

[ENTER/YES]

, 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.

11. Click the 

[JOG UP]

 or 

[JOG DOWN]

 until 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

12. Click the  

[ENTER/YES]

, and save the adjustment results in

the non-volatile memory. (“EFB = 

 SAVE” will be displayed

for a moment.)
Next “EF MO ADJUST” (C07) is displayed. The disc stops
rotating automatically.

13. Click the 

[EJECT]

 and take out the disc.

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

[JOG UP]

  or 

[JOG DOWN]

 to display “EF CD

ADJUST” (C08).

16. Click the 

[ENTER/YES]

 to display “EFB = 

 CD”. Servo is

imposed automatically.

17. Click the 

[JOG UP]

  or 

[JOG DOWN]

 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. Click the 

[ENTER/YES]

, display “EFB = 

 SAVE” for a mo-

ment and save the adjustment results in the non-volatile
memory.
Next “EF CD ADJUST” (C08) will be displayed.

19. Click the 

[EJECT]

 button and take out the disc (MD) TDYS-

1.

Adjustment Location: BD board (see page 35)

Adjusting Procedure:
1. Load the continuously-recorded disc.  (Refer to “5.  USING

THE CONTINUOUSLY RECORDED DISC”)

2. Click the 

[JOG UP]

  or 

[JOG DOWN]

 to display “CPLAY2

MODE” (C36).

3. Click the 

[ENTER/YES]

 to display “CPLAY2MID”.

4. Click the 

[MENU/NO]

 when “C = 

 AD = 

” is displayed.

5. Click the 

[JOG  UP]

  or 

[JOG  DOWN]

 to display “FBIAS

ADJUST” (C09).

6. Click the 

[ENTER/YES]

 to 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. Click the 

[JOG UP]

 and find the focus bias value at which the

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

8. Click the 

[ENTER/YES]

 to display “

/

 b = 

”.

9. Click the 

[JOG DOWN]

 and find the focus bias value at which

the C1 error rate becomes about 200.

10. Click the 

[ENTER/YES]

 to display “

/

 c = 

”.

11. Check that the C1 error rate is below 20 and ADER is 00.

Then click the 

[ENTER/YES]

.

12. If the “(

)” in “

 - 

 - 

  (

)” is above 20, click the

[ENTER/YES]

  button.

If below 20, click the 

[MENU/NO]

 and repeat the adjustment

from step 2.

13. Click the 

[EJECT]

 button and take out the disc.

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 auto-
matically calculated from points A and B.

As the C1 error rate changes, perform the adjustment using the
average vale.

A

B

VC

Specification A = B

A

B

VC

Specification A = B

A

B

VC

Specification A = B

C1 error

about 
200

B

C

A

Focus bias value

7. Click the 

[ENTER/YES]

 and save the result of adjustment to

the non-volatile memory (“EFB = 

 SAVE” will be displayed

for a moment. Then “EFB = 

 MO-W” will be displayed).

34

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

[JOG UP]

  or 

[JOG DOWN]

 to display “CPLAY2

MODE” (C36).

3. Click the

 [ENTER/YES]

 twice and display “CPLAY2MID”.

4. The display changes to “C = 

 AD = 

”.

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

[MENU/NO]

 to stop playback, then click the 

[EJECT]

and take out the check disc.

Checking Procedure:
1. Load the continuously-recorded disc.  (Refer to “5-6.  USING

THE CONTINUOUSLY RECORDED DISC”)

2. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “CPLAY2

MODE” (C36).

3. Click the

 [ENTER/YES]

 to display “CPLAY2MID”.

4. The display changes to “C = 

 AD = 

”.

5. If the C1 error rate is below 20, check that ADER is 00.
6. Click the

[MENU/NO]

 to stop playback, then click the

[EJECT]

 and take out the test disc.

Change the focus bias and check the focus tolerance amount.

Checking Procedure:
1. Load the continuously-recorded disc.  (Refer to “5-6.  USING

THE CONTINUOUSLY RECORDED DISC”)

2. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “CPLAY2

MODE” (C36).

3. Click the 

[ENTER/YES]

 twice to display “CPLAY2MID”.

4. Click the 

[MENU/NO]

 when “C = 

 AD = 

” is displayed.

5. Click the 

[JOG  UP]

 or 

[JOG  DOWN]

 to display “FBIAS

CHECK” (C16).

6. Click the 

[ENTER/YES]

 to 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 20 and ADER is below 2.

7. Click the 

[ENTER/YES]

 and display “

/

 b = 

”.

Check that the C1 error is about 100 and ADER is below 2.

8. Click the 

[ENTER/YES]

 and display “

/

 a = 

”.

Check that the C1 error is about 100 and ADER is below 2

9. Click the 

[MENU/NO]

, then click the 

[EJECT]

 and take out

the disc.

If the C1 error and ADER are above other than the specified
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 prop-
erly. Adjust perform the beginning again.

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

Adjusting Procedure:
1. Load the check disc (MD) TDYS-1.
2. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “AG Set (CD)”

(C11).

3. When the 

[ENTER/YES]

 is clicked, 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)” (C11).

4. Click the 

[EJECT]

 and take out the check disc.

Adjusting Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Click the 

[JOG UP]

 or 

[JOG DOWN]

 to display “AG Set

(MO)” (C10).

3. When the 

[ENTER/YES]

 is clicked, 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)” (C10).

4. Click the 

[EJECT]

 and take out the test disc.