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26

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”
(See page 22) and execute the initial setting before the adjustment as re-
quired.

Procedure:
1. Turn the 

[       AMS       ]

 knob to display “ADJ CLEAR”  (C28).

2. Press the 

[YES]

 button. “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
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.

Recording Procedure:
1. Turn the 

[       AMS       ]

 knob to display “Iop Write” (C05),

and press the 

[YES]

 button.

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 : Turn the 

[       AMS       ]

 knob.

To select the digit : Press the 

[       AMS       ]

 button.

4. When the 

[YES]

 button is pressed, the display becomes

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

5. As the adjustment results are recorded for the step 4 value.

Leave it as it is and press the 

[YES]

 button.

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. Turn the 

[       AMS       ]

 knob to display “Iop Read”(C26).

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, press the 

[       AMS       ]

 knob and 

[MENU/NO]

button 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.

Procedure:
1. Turn the 

[       AMS       ]

 knob to display “TEMP ADJUST”

(C03).

2. Press the 

[YES]

 button to select the “TEMP ADJUST” mode.

3. “TEMP = 

 [OK]” and the current temperature data will be

displayed.

4. To save the data, press the 

[YES]

 button.

When not saving the data, press the 

[MENU/NO]

 button.

5. When the 

[YES]

 button is pressed, “TEMP = 

 SAVE” will

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

[MENU/NO]

 button is pressed, “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 type and IOP value of the optical pick-up before adjust-
ments. (Refer to 5-4. How to Distinguish between Optical pick-up
KMS-260B and KMS-260E (see page 22), 5-9. Recording and
Displaying the IOP Information)

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

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

m

button and

M

button to move the optical pick-

up)
Connect the digital voltmeter to CN105 pin 1 (I+3V) and
CN105pin 2 (IOP) on the BD board.

2. Turn the 

[       AMS       ]

 knob to display “LDPWR ADJUST”

(C04).
(Laser power : For adjustment)

3. Press the 

[YES]

 button once to display “LD 0.9 mW $ 

”.

4. Turn the 

[       AMS       ]

 knob so that the reading of the laser

power meter becomes 0.85 to 0.91 mW. Press the 

[YES]

 button

after setting the range knob of the laser power meter becomes
10 mW, and save the adjustment results. (“LD SAVE $ 

” will

be displayed for a moment)

5. Then “LD 7.0 mW $ 

” will be displayed.

Optical pick-up
objective lens

laser
power meter

+
–

BD board

digital voltmeter

CN105 pin 

1

 (I+3V)

CN105 pin 

2

 (IOP)

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27

6. Turn the 

[       AMS       ]

 knob so that the reading of the laser

power meter becomes 6.9 to 7.1 mW, press the 

[YES]

 button

to save it. (“LD SAVE $ 

” will be displayed for a moment)

Do not perform the emission with 7.0 mW more than 15 seconds
continuously.

7. Then,  turn the 

[       AMS       ]

 knob to display “LDPWR

CHECK” (C13).

8. Press the 

[YES]

 button once to display “LD 0.9mW$ 

”.

Check that the reading of the laser power meter become 0.85
to 0.91 mW (KMS-260B) or 0.90 to 0.96 mW (KMS-260E).

9. Press the 

[YES]

 button once more to display “LD 7.0mW$

”. Check that the reading the laser power meter and digital

voltmeter satisfy the specified value.
Note down the digital voltmeter reading value.

Specified Value:
Laser power meter reading : 7.0 

±

 0.1 mW (KMS-260B)

7.25 

±

 0.05 mW (KMS-260E)

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

±

10%

10. Press the 

[MENU/NO]

 button to display “LDPWR CHECK”

(C13) and stop the laser emission.
(The 

[MENU/NO]

 button is effective at all times to stop the

laser emission)

11. Turn the 

[       AMS       ]

 knob to display “Iop Write” (C05).

12. Press the 

[YES]

 button. When the display becomes

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

[YES]

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 : Turn the 

[       AMS       ]

 knob.

To select the digit : Press the 

[       AMS       ]

 knob.

14. When the 

[YES]

 button is pressed, “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 9, each time the

  [YES] 

button is pressed, the display

will be switched “LD 0.7mW$ 

”, “LD 6.2mW$ 

”, and “LD

WP

$ 

”. Nothing needs to be performed here.

Adjustment Location: BD board (see page 30)

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
temperature.

Procedure:
1. Turn the 

[       AMS       ]

 knob to display “Iop NV Save” (C06).

2. Press the 

[YES]

 button and display “Iop [stop]”.

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

[YES]

button.

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. Press the

M

button to move the optical pick-up outside the

pit.

4. Turn the 

[       AMS       ]

 knob to display “EF MO ADJUST”

(C07).

5. Press the 

[YES]

 button to display “EFB = 

 MO-R”.

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

6. Turn the 

[       AMS       ]

 knob so that the waveform of the

oscilloscope becomes the specified value.
(When the 

[       AMS       ]

 knob is turned, 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 

[YES]

 button 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).

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.

KMS260B or E

20101

B0825

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

Ω

)

(Optical pick-up label)

For details of the method for
checking this value, refer to 
“5-9. Recording and Displaying
the IOP Information”

+
–

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

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

to “Iop 7.0mW”.

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

[YES]

button.

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

has been completed.

+
–

oscilloscope

(DC range)

10 pF

330 k 

Ω

CN105 pin 

4

 (TE)

CN105 pin 

6

 (VC)

BD board

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28

8. Turn the 

[       AMS       ]

 knob so that the waveform of the

oscilloscope becomes the specified value.
(When the 

[       AMS       ]

 knob is turned, 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 

[YES]

 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.

11. Turn the 

[       AMS       ]

 knob 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. Press the 

[YES]

 button, 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. Press the

Z

button and take out the disc.

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

[       AMS       ]

 knob to display “EF CD ADJUST”

(C08).

16. Press the 

[YES]

 button to display “EFB = 

 CD”. Servo is

imposed automatically.

17. Turn the 

[       AMS       ]

 knob 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 

[YES]

 button, 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. Press the

Z

button and take out the  check disc (TDYS-1).

Adjustment Location: BD board (see page 30)

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

THE CONTINUOUSLY RECORDED DISC” (See page 23))

2. Turn the 

[       AMS       ]

 knob to display “CPLAY1MODE”

(C34).

3. Press the 

[YES]

 button to display “CPLAY1MID”.

4. Press the 

[MENU/NO]

 button when “C = 

 AD = 

)” is

displayed.

5. Turn the 

[       AMS       ]

 knob to display “FBIAS ADJUST”

(C09).

6. Press the 

[YES]

 button to display “

/

 a = 

 T”.

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. Turn the 

[       AMS       ]

 knob in the clockwise and find the

focus bias value at which the C1 error rate becomes about 220
(refer to Note 2).

8. Press the 

[YES]

 button to display “

/

 b = 

 T”.

9. Turn the 

[       AMS       ]

 knob in the counterclockwise and find

the focus bias value at which the C1 error rate becomes about
220.

10. Press the 

[YES]

 button to display “

/

 c = 

 T”.

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

Then press the 

[YES]

 button.

12. If the “(

)” in “

 - 

 - 

 (

)” is above 20, press the 

[YES]

button.
If below 20, press the 

[MENU/NO]

 button and repeat the ad-

justment from step 2.

13. Press the

Z

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 
220

B

C

A

Focus bias value

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29

Procedure:
1. Load the check disc (TDYS-1).
2. Turn the 

[       AMS       ]

 knob to display “CPLAY1MODE”

(C34).

3. Press the 

[YES]

 button twice and display “CPLAY1MID”.

4. The display changes to “C = 

 AD = 

)”.

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

[MENU/NO]

 button to stop playback, then press

the

Z

button and take out the check disc (TDYS-1).

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

THE CONTINUOUSLY RECORDED DISC” (See page 23))

2. Turn the 

[       AMS       ]

 knob to display “CPLAY1MODE”

(C34).

3. Press the 

[YES]

 button to display “CPLAY1MID”.

4. The display changes to “C = 

 AD = 

)”.

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

[MENU/NO]

 button to stop playback, then press

the

Z

button and take out the disc.

Change the focus bias and check the focus tolerance amount.

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

THE CONTINUOUSLY RECORDED DISC” (See page 23))

2. Turn the 

[       AMS       ]

 knob to display “CPLAY1MODE”

(C34).

3. Press the 

[YES]

 button twice to display “CPLAY1MID”.

4. Press the 

[MENU/NO]

 button when “C = 

 AD = 

)” is

displayed.

5. Turn the 

[       AMS       ]

 knob to display “FBIAS CHECK”

(C16).

6. Press the 

[YES]

 button to display “

/

 c = 

 T”.

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. Press the 

[YES]

 button and display “

/

 b = 

 T”.

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

8. Press the 

[YES]

 button and display “

/

 a = 

 T”.

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

9. Press the 

[MENU/NO]

 button, then press the

Z

button 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.

Procedure:
1. Load the check disc (TDYS-1).
2. Turn the 

[       AMS       ]

 knob to display “AG Set (CD)” (C11).

3. When the 

[YES]

 button is pressed, the adjustment will be per-

formed 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. Press the

Z

button and take out the check disc (TDYS-1).

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

[       AMS       ]

 knob to display “AG Set (MO)” (C10).

3. When the 

[YES]

 button is pressed, the adjustment will be per-

formed 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. Press the

Z

button and take out the test disc

(MDW-74/GA-1).

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