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33

9. Press the

ENTER/YES “R”

button to display “EFB = 

 MO-P”.

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

10. Observe the waveform of the oscilloscope, and check that the

specified value is satisfied. Do not Press the

l

 

m

or

 M

 

L

button.

Traverse Waveform

11. Press the

ENTER/YES “R”

button to display “EF MO CHECK”

The disc stops rotating automatically.

12. Press the

A

  (MD) button and take out the disc.

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

l

 

m

or

M

 

L

button and display “EF CD

CHECK”.

15. Press the

ENTER/YES “R”

button to display “EFB = 

 CD”.

Servo is imposed automatically.

16. Observe the waveform of the oscilloscope, and check that the

specified value is satisfied. Do not press the

l

 

m

or

 M

 

L

button.

Traverse Waveform

17. Press the

ENTER/YES “R”

button to display “EF CD CHECK”.

18. Press the

A

  (MD) button and take out the check disc.

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

l

 

m

or

M

 

L

button to display “CPLAY

MODE”.

3. Press the

ENTER/YES  “R”

button twice to display “CPLAY

MID”.

4. Press the

MENU/NO “R”

button when “C1 = 

 AD = 

” is

displayed.

5. Press the

l

 

m

or

M

 

L

button to display “FBIAS

CHECK”.

6. Press the

ENTER/YES “R”

button 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 50 and ADER is below 2.

7. Press the

ENTER/YES “R”

button to display “

/

 b = 

”.

Check that the C1 error is about 200 and ADER is below 2.

8. Press the

ENTER/YES “R”

button to display “

/

 a = 

”.

Check that the C1 error is about 200 and ADER is below 2.

9. Press the

MENU/NO “R”

button, then press the 

A

(MD) button

and take out the test disc.

I

I

I

I

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

l

 

m

or

M

 

L

button to display “CPLAY

MODE”.

3. Press the

ENTER/YES “R”

button to display “CPLAY MID”.

4. The display changes to “C1 = 

 AD = 

”.

5. If the C1 error rate is below 80, check that ADER is below 2.
6. Press the

MENU/NO  “R”

button to stop playback, then press

the

A

  (MD) button and take out the test disc.

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

l

 

m

or

M

 

L

button to display “CPLAY

MODE”.

3. Press the

ENTER/YES  “R”

button twice to display “CPLAY

MID”.

4. The display changes to “C1 = 

 AD = 

”.

5. Check that the C1 error rate is below 50.
6. Press the

MENU/NO  “R”

button to stop playback, then press

the

A

  (MD) button and take out the check disc.

Prepare a continuous recording disc using the unit to be repaired
and check the error rate.

Checking Procedure :
1. Load a recordable disc (blank disc).
2. Press the

l

 

m

or

M

 

L

button to display “CREC

MODE”.

3. Press the

ENTER/YES “R”

button to display “CREC MID”.

4. When recording starts, lights up 

[    REC]

 indicator and display

“CREC @@@@” (@@@@ is the address).

5. About 1 minute later, press the

MENU/NO “R”

button to stop

continuous recording.

6. Press the

l

 

m

or

M

 

L

button to display “CPLAY

MODE”.

7. Press the

ENTER/YES “R”

button to display “CPLAY MID”.

8. “C1 = 

 AD = 

” will be displayed.

9. Check that the C1 error becomes below 80 and the AD error

below 2.

10. Press the

MENU/NO  “R”

button to stop playback, then press

the

A

(MD) button and take out the disc.

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 “5-4. Precautions on Adjustments”
and execute the initial setting before the adjustment as required.

Setting Procedure :
1. Press the

l

 

m

or

M

 

L

button to display “ADJ

CLEAR”.

2. Press the

ENTER/YES  “R”

button.  “Complete!” will be

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

z

34

KMS260A

27X40
B0825

Ω

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. Press the

l

 

m

or

M

 

L

button to display “Iop Write”,

and press the

ENTER/YES “R”

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 : Press the

l

 

m

or

M

 

L

button.

To select the digit : Press the 

[SYNC REC]

 button.

4. When the

ENTER/YES  “R”

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

ENTER/YES “R”

button.

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

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

Display Procedure :
1. Press the

l

 

m

or

M

 

L

button to display “Iop Read”.

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 

[CD-MD SYNC]

 button or 

MENU/NO “R”

button to display “Iop Read”.

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. Press the

l

 

m

or

M

 

L

button to display “TEMP

ADJUST”.

2. Press the

ENTER/YES  “R”

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

ENTER/YES “R”

button.

When not saving the data, press the 

MENU/NO “R”

button.

5. When the

ENTER/YES  “R”

button is pressed, “TEMP = 

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

MENU/NO  “R”

button is pressed,

“TEMP ADJUST” 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 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

l

 

m

or

M

 

L

button to move the optical pick-up)

Connect the digital voltmeter to CN110 pin 5 (I+3V) and
CN110 pin 4 (IOP) on the BD  (MD) board.

2. Press the

l

 

m

or

M

 

L

button to display “LDPWR

ADJUST”.
(Laser power : For adjustment)

3. Press the

ENTER/YES “R”

button once to display “LD 0.9 mW

$ 

”.

4. Press the

l

 

m

or

M

 

L

button so that the reading of

the laser power meter becomes 0.85 to 0.91 mW. Press the
 

ENTER/YES “R”

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.

6. Press the

l

 

m

or

M

 

L

button so that the reading of

the laser power meter becomes 6.9 to 7.1 mW, press
the

ENTER/YES “R”

button to save it.

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

7. Then, press the

l

 

m

or

M

 

L

button to display

“LDPWR CHECK”.

8. Press the

ENTER/YES “R”

button once to display “LD 0.9 mW

$ 

”. Check that the reading of the laser power meter become

0.85 to 0.91 mW.

9. Press the

ENTER/YES “R”

button once more to display “LD

7.0 mW $ 

”. 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 ± 0.2 mW
Digital voltmeter reading : Value on the optical pick-up label

±10%

10. Press the

MENU/NO “R”

button to display “LDPWR CHECK”

and stop the laser emission.
(The

MENU/NO “R”

button is effective at all times to stop the

laser emission.)

11. Press the

l

 

m

or

M

 

L

button to display “Iop Write”.

+
–

BD (MD) board

digital voltmeter

CN110 pin 

5

 (I+3V)

CN110 pin 

4

 (IOP)

35

12. Press the

ENTER/YES “R”

button. When the display becomes

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

ENTER/

YES “R”

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

l

 

m

or

M

 

L

button.

To select the digit : Press the 

[SYNC REC]

 button.

14. When the

ENTER/YES “R”

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”.

After step 4, each time the

ENTER/YES “R”

button is pressed,

the display will be switched “LD 0.7 mW $ 

”, “LD 6.2 mW $

”, and “LD Wp 

 $ 

”. Nothing needs to be performed

here.

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

pin 1 (VC) on the BD (MD) board.

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

M

 

L

button to move the optical pick-up outside

the pit.

4. Press the

l

 

m

or

M

 

L

button to display “EF MO

ADJUST”.

5. Press the

ENTER/YES “R”

button to display “EFB = 

 MO-R”.

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

6. Press the

l

 

m

or

M

 

L

button so that the waveform

of the oscilloscope becomes the specified value.
(When the

l

 

m

or

M

 

L

button is pressed, the 

 of

“EFB= 

” changes and the waveform changes) In this

adjustment, 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

+
–

oscilloscope

(DC range)

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

BD (MD) board

CN110 pin 

3

 (TEO)

CN110 pin 

1

 (VC)

+
–

oscilloscope

(DC range)

10 pF

330 k 

Ω

CN110 pin 

3

 (TEO)

CN110 pin 

1

 (VC)

BD (MD) board

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.

7. Press the

ENTER/YES “R”

button and save the result of adjust-

ment to the non-volatile memory (“EFB = 

 SAVE” will be

displayed for a moment. Then “EFB = 

 MO-W” will be dis-

played).

8. Press the

l

 

m

or

M

 

L

button so that the waveform

of the oscilloscope becomes the specified value.
(When the

l

 

m

or

M

 

L

button is pressed, the 

 of

“EFB- 

” changes and the waveform changes) In this

adjustment, 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. Press the

ENTER/YES  “R”

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. Press the

l

 

m

or

M

 

L

button 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

ENTER/YES  “R”

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

A

(MD) button and take out the disc.

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

l

 

m

or

M

 

L

button to display “EF CD

ADJUST”.

16. Press the

ENTER/YES “R”

button to display “EFB = 

 CD”.

Servo is imposed automatically.

17. Press the

l

 

m

or

M

 

L

button 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

36

18. Press the

ENTER/YES “R”

button, display “EFB = 

 SAVE”

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

19. Press the

A

(MD) button and take out the disc.

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

ATING CONTINUOUSLY-RECORDED DISC”)

2. Press the

l

 

m

or

M

 

L

button to display “CPLAY

MODE”.

3. Press the

ENTER/YES “R”

button to display “CPLAY MID”.

4. Press the

MENU/NO “R”

button when “C1 = 

 AD = 

” is

displayed.

5. Press the

l

 

m

or

M

 

L

button to display “FBIAS

ADJUST”.

6. Press the

ENTER/YES “R”

button 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. Press the

M

 

L

button and find the focus bias value at

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

8. Press the

ENTER/YES “R”

button to display “

/

 b = 

”.

9. Press the

l

 

m

button and find the focus bias value at

which the C1 error rate becomes about 200.

10. Press the

ENTER/YES “R”

button to display “

/

 c = 

”.

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

Then press the

ENTER/YES “R”

button.

12. If the “(

)” in “

 - 

 - 

  (

)” is above 20, press

the

ENTER/YES “R”

 button.

If below 20, press the

MENU/NO “R”

button and repeat the ad-

justment from step 2.

13. Press the

A

(MD) 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.

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

l

 

m

or

M

 

L

button and display “CPLAY

MODE”.

3. Press the

ENTER/YES “R”

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

MENU/NO  “R”

button to stop playback, then press

the

A

(MD) button and take out the check disc.

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

ATING CONTINUOUSLY-RECORDED DISC”)

2. Press the

l

 

m

or

M

 

L

button to display “CPLAY

MODE”.

3. Press the

ENTER/YES “R”

button to display “CPLAY MID”.

4. The display changes to “C1 = 

 AD = 

”.

5. If the C1 error rate is below 50, check that ADER is below 2.
6. Press the

MENU/NO  “R”

button to stop playback, then press

the

A

(MD) button 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 “5-5.  CRE-

ATING CONTINUOUSLY-RECORDED DISC”)

2. Press the

l

 

m

or

M

 

L

button to display “CPLAY

MODE”.

3. Press the

ENTER/YES  “R”

button twice to display “CPLAY

MID”.

4. Press the

MENU/NO “R”

button when “C1 = 

 AD = 

” is

displayed.

5. Press the

l

 

m

or

M

 

L

button to display “FBIAS

CHECK”.

6. Press the

ENTER/YES “R”

button 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 50 and ADER is below 2.

7. Press the

ENTER/YES  “R”

button and display “

/

 b =

”.

Check that the C1 error is about 200 and ADER is below 2.

8. Press the

ENTER/YES  “R”

button and display “

/

 a =

”.

Check that the C1 error is about 200 and ADER is below 2.

9. Press the

MENU/NO “R”

button, then press the 

A

(MD) 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.

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

l

 

m

or

M

 

L

button to display “AG Set

(CD)”.

3. When the

ENTER/YES “R”

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

A

(MD) button and take out the check disc.