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31

Note:
Mode which sets the adjustment results recorded in the non-vola-
tile 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 ex-
cluding the temperature compensation offset adjustment.
For details of the initial setting, refer to “5-4. Precautions on Ad-
justments” and execute the initial setting before the adjustment as
required.

Setting Procedure :
1. Rotate the  l AMS L  knob to display “ADJCLEAR”

(C28).

2. Press the  YES  button. “Complete!” will be displayed momen-

tarily 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 label of the optical pick-up 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  l AMS L  knob and  x  button, con-

nect the power plug to the outlet, and release the  l AMS
L  knob and  x  button.

2. Rotate the  l AMS L  knob to display “[Service]”, and

press the  YES  button.

3. Rotate the  l AMS L  knob to display “Iop.Write”(C05),

and press the  YES  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 : Rotate the  l AMS L  knob.
To select the digit : Press the  l AMS L  knob

6. When the  YES  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  YES  button.

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

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

Display Procedure :
1. Rotate the  l AMS L  knob to display “Iop.Read”(C26)

and press the  YES  button.

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  l AMS L  button or  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.
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. Rotate the  l AMS L  knob and display “TEMP ADJUS”

(C03).

2. Press the  YES  button and select the “TEMP ADJUS”(C03)

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 ADJUS”(C03) display then.
When the  MENU/NO  button is pressed, “TEMP ADJUS” (C03)
will be displayed immediatelly.

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 5-8. Recording and Displaying Iop Information.)

Connection :
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  m  button
or  M  button to move the optical pick-up.)
Connect the digital volt meter to CN105 pin 1 (I+3V) and
CN105 pin 2 (IOP).

2. Rotate the  l AMS L  knob and display “LDPWR

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

3. Press the  YES  button once and display “LD 0.9 mW $ 

”.

4. Rotate the  l AMS L  knob so that the reading of the laser

power meter becomes the specified value. Press the  YES
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. Rotate the  l AMS L  knob so that the reading of the

laser power meter becomes the specified value, press the
YES   button and save it.

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

seconds continuously.

CN105 pin 1 (I+3V)

CN105 pin 2 (IOP)

32

7. Then, rotate the  l AMS L  knob and display “LDPWR

CHECK”(C13).

8. Press the  YES  button once and display “LD 0.9 mW $ 

”.

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

9. Press the  YES  button once more and display “LD 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.

Specified Value :
Laser power meter reading : LD 0.9mW : 0.85-0.91mW (260B)

0.90-0.96mW (260E)

  LD 7.0mW : 6.90-7.10mW (260B)

7.20-7.30mW (260E)

Digital voltmeter reading : Optical pick-up displayed value 

± 10%

(Optical pick-up label)

10. Press the  MENU/NO  button and display “LDPWR CHECK”

(C13) and stop the laser emission.
(The  MENU/NO  button is effective at all times to stop the
laser emission.)

11. Rotate the  l AMS L  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 : Rotate the  l AMS L  knob.
To select the digit : Press the  l AMS L  knob

14. When the  YES  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”(C05).

Note 1: After step 4, each time the  YES  button is pressed, the

display will be switched between “LD 0.7 mW $ 

”, “LD

6.2 mW $ 

”, and “LD Wp 

 $ 

”. Nothing needs

to be performed here.

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

6

 (VC) of the BD board.

2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.)
3. Press the  M  button and move the optical pick-up outside the

pit.

4. Rotate the  l AMS L  knob and display “EF MO

ADJUS”(C07).

5. Press the  YES  button and display “EFB = 

 MO-R”.

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

6. Rotate the  l AMS L  knob so that the waveform of the

oscilloscope becomes the specified value.
(When the  l AMS L  knob is rotated, the 

 of “EFB=

” changes and the waveform changes.) In this adjustment,

waveform varies at intervals of approx. 2%. Adjust the wave-
form 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).

8. Rotate the  l AMS L  knob so that the waveform of the

oscilloscope becomes the specified value.
(When the  l AMS L  knob is rotated, the 

 of “EFB- 

MO-W” changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the wave-
form 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.

CN105 pin 4 (TE)

CN105 pin 6 (VC)

5-11. Iop NV SAVE
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 OP and when replacing the IC102.
Otherwise the OP check may deteriorate.

Note: Perform this function with the optical pick-up set at room

temperature.

Procedure
1. Rotate the  l AMS L  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.

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

to “Iop 7.0 mW”.

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.

KMS

260B

20101
H0576

Iop = 57.6 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”.)

R

33

11. Rotate the  l AMS L  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 ADJUS” (C07) is displayed. The disc stops ro-
tating automatically.

13. Press the  A EJECT  button and remove the disc.
14. Load the check disc (MD) TDYS-1.
15. Roteto  l AMS L  knob and display “EF CD ADJUS”

(C08).

16. Press the  YES  button and display “EFB = 

 CD”. Servo is

imposed automatically.

17. Rotate the  l AMS L  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 ADJUS”(C08) will be displayed.

19. Press the  A 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/GA-1).
2. Rotate the  l AMS L  knob and display “CPLAY1

MODE”(C34).

3. Press the  YES  button and display “CPLAY1 MID”.
4. Press the  MENU/NO  button when “C = 

 AD = 

” is

displayed.

5. Rotate the  l AMS L  knob and display “FBIAS

ADJUS”(C09).

6. Press the  YES  button and display “ 

/

 a = 

”.

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

7. Rotate the  l AMS L  knob in the clockwise direction and

find the focus bias value at which the C error rate becomes 220
(Refer to Note 2).

8. Press the  YES  button and display “ 

/

 b = 

”.

9. Rotate the  l AMS L  knob in the counterclockwise di-

rection and find the focus bias value at which the C error rate
becomes 220.

10. Press the  YES  button and display “ 

/

 c = 

”.

11. Check that the C 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
adjustment from step 2.

13. Press the  A EJECT  button to remove the test disc.

Note 1 : The relation between the C 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 C error rate changes, perform the adjustment using

the average vale.

Ω

CN105 pin 4 (TE)

CN105 pin 6 (VC)

34

Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the  l AMS L  knob and display “CPLAY1

MODE”(C34).

3. Press the  YES  button twice and display “CPLAY1 MID”.
4. The display changes to “C = 

 AD = 

”.

5. Check that the C error rate is below 20.
6. Press the  MENU/NO  button, stop playback, press the   A EJECT

button, and remove the test disc.

Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).

(Refer to “5-5. Using the Continuously Recorded Disc”.)

2. Rotate the l AMS L  knob and display “CPLAY1

MODE”(C34) .

3. Press the  YES  button and display “CPLAY1 MID”.
4. The display changes to “C = 

 AD = 

”.

5. If the C error rate is below 20, check that ADER is 00.
6. Press the  MENU/NO  button, stop playback, press the   A EJECT

button, and remove the test disc.

Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).

(Refer to “5-5. Using the Continuously Recorded Disc”.)

2. Rotate the  l AMS L  knob and display “CPLAY1

MODE”(C34).

3. Press the  YES  button twice and display “CPLAY1 MID”.
4. Press the  MENU/NO  button when “C = 

 AD = 

” is

displayed.

5. Rotate the  l AMS L  knob and display “FBIAS CHECK”

(C16).

6. Press the  YES  button and display “ 

/

 c = 

”.

The first four digits indicate the C error rate, the two digits after
[/] indicate ADR, and the 2 digits after [c =] indicate the focus
bias value.
Check that the C error is below 20 and ADER is below 2.

7. Press the  YES  button and display “ 

/

 b = 

”.

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

8. Press the  YES  button and display “ 

/

 a = 

”.

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

9. Press the  MENU/NO  button, next press the  A EJECT   button,

and remove the continuously recorded disc.

Note 1 : If the C 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 Optical pick-up is re-
placed.
If the adjustment results becomes “Adjust NG!”, the Optical pick-
up may be faulty or the servo system circuits may be abnormal.

5-16-1. CD Auto Gain Control Output Level Adjustment
Adjusting Procedure :
1. Insert the check disc (MD) TDYS-1.
2. Rotate the  l AMS L  knob to display “AG Set (CD)”

(C11).

3. When the  YES  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 EJECT  button to remove the disc.

Adjusting Procedure :
1. Insert the reference disc (MDW-74/GA-1) for recording.
2. Rotate the  l AMS L  knob to display “AG Set (MO)”

(C10).

3. When the  YES  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)”(C10).

4. Press the   A EJECT  button to remove the disc.