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29

7. Press the  YES  button and display “EFB = 

 MO-W”.

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

specified value is satisfied. Do not rotate the  l AMS L
knob.
(Write power traverse checking)

(Traverse Waveform)

11. Press the  YES  button display “EF MO CHECK”

The disc stops rotating automatically.

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

(C04).

15. Press the  YES  button and display “EFB = 

 CD”. Servo is

imposed automatically.

9. Press the  YES  button 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 rotate the  l AMS L
knob.

(Traverse Waveform)

Checking 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 CHECK”.
5. Press the  YES  button and display “EFB = 

 MO-R”.

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

4

6

IA – BI

IA – BI

This test mode performs C-REC and C-PLAY automatically for
mainly checking the characteristics of the optical pick-up. To
perform this test mode, the laser power must first be checked.
Perform Auto Check after the laser power check and Iop compare.

Procedure
1. Press the  YES  button. If “LDPWR minicheck” is displayed, it

means that the laser power check has not been performed. In
this case, perform the laser power check and Iop compare, and
then repeat from step 1.

2. If a disc is in the mechanical deck, it will be ejected forcibly.

“DISC IN” will be displayed in this case. Load a test disc (MDW-
74/GA-1) which can be recorded.

3. If a disk is loaded at step 2, the check will start automatically.
4. When “XX CHECK” is displayed, the item corresponding to

XX will be performed.
When “06 CHECK” completes, the disc loaded at step 2 will be
ejected. “DISC IN” will be displayed. Load the check disc (MD)
TDYS-1.

5. When the disc is loaded, the check will automatically be resumed

from “07 CHECK”.

6. After completing to test item 12, check OK or NG will be

displayed. If all items are OK, “CHECK ALL OK” will be
displayed. If any item is NG, it will be displayed as “NG:xxxx”.

When “CHECK ALL OK” is displayed, it means that the optical
pick-up is normal. Check the operations of the other spindle motor,
thread motor, etc.
When displayed as “NG:xxxx”, it means that the optical pick-up is
faulty. In this case, replace the optical pick-up.

All the following checks are performed by the Auto Check mode.
They therefore need not be performed in normal operation.

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

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

IA – BI

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

specified value is satisfied. Do not rotate the  AMS  knob.
(Read power traverse checking)

(Traverse Waveform)

30

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”.

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 test disc.

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

MODE”.

3. Press the  YES  button twice and display “CPLAY1 MID”.
4. The display changes to “C1 = 

 AD = 

”.

5. Check that the C1 error rate is below 20.
6. Press the  MENU/NO  button, stop playback, press the  A EJECT

button, and the test disc.

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

Checking Procedure :
1. Insert a recordable test disc (MDW-74/GA-1) into the unit.
2. Rotate the  l AMS L  knob to display “CREC1 MODE”.
3. Press the  YES  button to display the “CREC1 MID”.
4. When recording starts, “  

  ” is displayed, this becomes

“CREC 1 (@@@@)” (@@@@ is the address), and recording
starts.

5. About 1 minute later, press the  MENU/NO  button to stop

continuous recording.

6. Rotate the  l AMS L  knob to display “C PLAY1 MODE”.
7. Press the  YES  button to display “C PLAY1 MID”.
8. “C = 

 AD = 

” will be displayed.

9. Check that the C error becomes below 20 and the AD error

below 2.

10. Press the  MENU/NO  button to stop playback, and press the  A

EJECT  button and remove the 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”.

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 CHECK”.
6. Press the  YES  button and display “ 

/

 c = 

”.

The first four digits indicate the C error rate, the two digits after
[/] indicate ADER, 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 test disc.

Ω

4

6

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

specified value is satisfied. Do not rotate the  l AMS L
knob.

(Traverse Waveform)

17. Press the  YES  button and display “EF CD CHECK”.
18. 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.

IA – BI

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

tarily 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 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”, 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”.

Display Procedure :
1. Rotate the  l AMS L  knob 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  l AMS L  button or  MENU/NO

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. Rotate the  l AMS L  knob and display “TEMP ADJUST”.
2. Press the  YES  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  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” display then.
When the  MENU/NO  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  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”.
(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.

1

2

32

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

CHECK”.

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.

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”

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”.
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”.

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 AD-

JUST”.

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.

4

6

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