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– 29 –

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  u  (MD) or  x  (MD) button to display “TEMP

ADJUST”.

2. Press the 

[RADIO/BAND] button to select the “TEMP ADJUST”

mode.

3. “TEMP = 

” and the current temperature data will be displayed.

4. To save the data, press the 

[RADIO/BAND] button.

When not saving the data, press the 

[REC/REC MODE] button.

5. When the 

[RADIO/BAND] button is pressed, “TEMP = 

 SAVE”

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

[REC/REC  MODE] 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”.

7. Then, press the  u  (MD) or  x  (MD) to display “LDPWR

CHECK”.

8. Press the 

[RADIO/BAND] button once to display “LD 0.9mW $

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

0.85 to 0.91 mW.

9. Press the 

[RADIO/BAND] 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%

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  .  but-
ton or  >  button to move the optical pick-up)
Connect the digital voltmeter to CN110 pin 5 (I+3 V) and
CN110 pin 4 (IOP) on the BD board.

2. Press the  u  (MD) or  x  (MD) button to display “LDPWR

ADJUST”.
(Laser power: For adjustment)

3. Press the 

[RADIO/BAND] button once to display “LD 0.9 mW $

”.

4. Press the  u  (MD) or  x  (MD) button so that the reading of

the laser power meter becomes 0.85 to 0.91 mW. Press the
[RADIO/BAND] 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  u  (MD) or  x  (MD) button and adjust so that the

reading on the laser power meter is 6.9 to 7.1 mV. Press the
[RADIO/BAND] button to save the setting.

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

continuously.

10. Press the 

[REC/REC MODE] button to display “LDPWR CHECK”

and stop the laser emission.
(The 

[REC/REC MODE] button is effective at all times to stop

the laser emission)

After step 9, each time the 

[RADIO/BAND] 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.

(

 = correction)

5

4

KMS260B

27X40
B0825

Ω

– 30 –

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.

8. Press the  u  (MD) or  x  (MD) button so that the waveform

of the oscilloscope becomes the specified value.
(When the JOG dial is turned, the 

 of “EFB- 

” changes and

the waveform changes) In this adjustment, waveform varies at
intervals of approx. 2%. Adjust the waveform so that the speci-
fied value is satisfied as much as possible.
(Write power traverse adjustment)

Traverse Waveform

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

pin 1 (VC) on the BD board.

2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the  >  button to move the optical pick-up outside the

pit.

4. Press the  u  (MD) or  x  (MD) button to display “EFBAL

ADJUST”.

5. Press the 

[RADIO/BAND] button to display “EFB = 

 MO-R”.

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

6. Press the  u  (MD) or  x  (MD) button so that the waveform

of the oscilloscope becomes the specified value.
(When the  u  (MD) or  x  (MD) button is pressed, the 

 of

“EFB = 

” changes and the waveform changes ) In this adjust-

ment, 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

Ω

3

1

3

1

7. Press the 

[RADIO/BAND] 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)

9. Press the 

[RADIO/BAND] button, and save the adjustment re-

sults 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  u  (MD) or  x  (MD) 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 

[RADIO/BAND] button, and save the adjustment re-

sults in the non-volatile memory. (“EFB = 

 SABE” will be

displayed for a moment)
Next “EFBAL ADJUST” is displayed. The disc stops rotating
automatically.

13. Press the  Z  (MD) button and take out the disc.
14. Load the check disc (MD) TDYS-1.
15. Press the 

[RADIO/BAND] button to display “EFB = 

 CD”. Servo

is imposed automatically.

16. Turn the JOG dial 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

– 31 –

17. Press the 

[RADIO/BAND] button, display “EFB = 

 SAVE” for

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

18. Press the  Z  (MD) button and take out the disc.

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

CONTINUOUSLY-RECORDED DISC”)

2. Press the  u  (MD) or  x  (MD) button to display “CPLAY

MODE”.

3. Press the 

[RADIO/BAND] button to display “CPLAY MID”.

4. Press the 

[REC/REC MODE] button when “C1 

 = AD = 

”

is displayed.

5. Press the  u  (MD) or  x  (MD) button to display “FBIAS

ADJUST”.

6. Press the 

[RADIO/BAND] 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. Turn the JOG dial clockwise and find the focus bias value at

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

8. Press the 

[RADIO/BAND] button to display “

/

 b = 

”.

9. Press the  u  (MD) or  x  (MD) button counterclockwise and

find the focus bias value at which the C1 error rate becomes
about 200.

10. Press the 

[RADIO/BAND] button to display “

/

 c = 

”.

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

press the 

[RADIO/BAND] button.

12. If the “(

)” in “

 - 

 - 

  (

)” is above 20, press the

[RADIO/BAND] button.
If below 20, press the 

[REC/REC MODE] button and repeat the

adjustment from step 2.

13. Press the  Z  (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 form points A and B.

As the C1 error rate changes, perform the adjustment using the

average value.

Checking Procedure:
1. Load the check disc (MD) TDYS-1.
2. Press the  u  (MD) or  x  (MD) button and display “CPLAY

MODE”.

3. Press the 

[RADIO/BAND] 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 

[REC/REC MODE] button to stop playback, then press

the  Z  (MD) button and take out the check disc.

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

CONTINUOUSLY-RECORDED DISC”)

2. Press the  u  (MD) or  x  (MD) button to display “CPLAY

MODE”.

3. Press the 

[RADIO/BAND] 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 00.
6. Press the 

[REC/REC MODE] button to stop playback, then press

the  Z  (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. CREAT-

ING CONTINUOUSLY-RECORDED DISC”)

2. Press the  u  (MD) or  x  (MD) button to display “CPLAY

MODE”.

3. Press the 

[RADIO/BAND] button twice to display “CPLAY MID”.

4. Press the 

[REC/REC MODE] button when “C1 

 = AD = 

”

is displayed.

5. Press the  u  (MD) or  x  (MD) button to display “FBIAS

CHECK”.

6. Press the 

[RADIO/BAND] 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 

[RADIO/BAND] button and display “

/

 b = 

”.

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

8. Press the 

[RADIO/BAND] button and display “

/

 a = 

”.

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

9. Press the 

[REC/REC MODE] button, then press the  Z  (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 properly.
Adjust perform the beginning again.

– 32 –

It is useful to use the jig for checking the waveform. (Refer to Ser-
vicing Notes on page 5)