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[ENTER/YES]
7. Click the
and save the result of adjustment to
the non-volatile memory ("EFB =
for a moment. Then "EFB =
[JOG UP]
[JOG DOWN]
8. Click the
or
of the oscilloscope becomes the specified value.
[JOG UP]
(When the
or
"EFB=
" changes and the waveform changes.) In this ad-
justment, 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
VC
Specification A = B
[ENTER/YES]
9. Click the
, and save the adjustment results in
the non-volatile memory. ("EFB =
for a moment)
10. "EFB =
MO-P" will be displayed.
The optical pick-up moves to the pit area automatically and
servo is imposed.
[JOG UP]
[JOG DOWN]
11. Click the
or
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
VC
Specification A = B
[ENTER/YES]
12. Click the
, and save the adjustment results in
the non-volatile memory. ("EFB =
for a moment.)
Next "EF MO ADJUST" (C07) is displayed. The disc stops
rotating automatically.
[EJECT]
13. Click the
and take out the disc.
14. Load the check disc (MD) TDYS-1.
[JOG UP]
15. Click the
or
ADJUST" (C08).
[ENTER/YES]
16. Click the
to display "EFB =
imposed automatically.
[JOG UP]
[JOG DOWN]
17. Click the
or
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
VC
Specification A = B
SAVE" will be displayed
MO-W" will be displayed).
so that the waveform
[JOG DOWN]
is clicked, the
A
B
SAVE" will be displayed
until the waveform of
A
B
SAVE" will be displayed
[JOG DOWN]
to display "EF CD
CD". Servo is
so that the waveform
A
B
[ENTER/YES]
18. Click the
ment and save the adjustment results in the non-volatile
memory.
Next "EF CD ADJUST" (C08) will be displayed.
[EJECT]
19. Click the
1.
of
Adjustment Location: BD board (see page 35)
5-14. FOCUS BIAS ADJUSTMENT
Adjusting Procedure:
1. Load the continuously-recorded disc. (Refer to "5. USING
THE CONTINUOUSLY RECORDED DISC")
[JOG UP]
2. Click the
MODE" (C36).
[ENTER/YES]
3. Click the
[MENU/NO]
4. Click the
[JOG UP]
5. Click the
ADJUST" (C09).
[ENTER/YES]
6. Click the
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.
[JOG UP]
7. Click the
C1 error rate becomes about 200 (refer to Note 2).
[ENTER/YES]
8. Click the
[JOG DOWN]
9. Click the
the C1 error rate becomes about 200.
[ENTER/YES]
10. Click the
11. Check that the C1 error rate is below 20 and ADER is 00.
[ENTER/YES]
Then click the
12. If the "( )" in "
[ENTER/YES]
button.
If below 20, click the
from step 2.
[EJECT]
13. Click the
Note 1: 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.
Note 2: As the C1 error rate changes, perform the adjustment using the
average vale.
C1 error
about
200
B
MDS-NT1
, display "EFB =
SAVE" for a mo-
button and take out the disc (MD) TDYS-
[JOG DOWN]
or
to display "CPLAY2
to display "CPLAY2MID".
when "C =
AD =
" is displayed.
[JOG DOWN]
or
to display "FBIAS
to display "
/
a =
and find the focus bias value at which the
to display "
/
b =
and find the focus bias value at which
to display "
/
c =
.
-
-
( )" is above 20, click the
[MENU/NO]
and repeat the adjustment
button and take out the disc.
Focus bias value
C
A
".
".
".
33
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