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8. Turn the = ˜ + knob so that the waveform of the
oscilloscope becomes the specified value.
(When the = ˜ + knob is turned, the
" 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 pos-
sible.
(Write power traverse adjustment)
(Traverse Waveform)
VC
Specification A = B
[YES]
9. Press the
button, and save the adjustment results in the
non-volatile memory. ("EFB =
a moment.)
10. "EFB =
MO-P". will be displayed.
The optical pick-up moves to the pit area automatically and
servo is imposed.
11. Turn the = ˜ + knob until the waveform of the oscil-
loscope 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
[YES]
12. Press the
button, and save the adjustment results in the
non-volatile memory. ("EFB =
a moment.)
Next "EF MO ADJUST" is displayed. The disc stops rotating
automatically.
[ EJECT]
13. Press the
6
button and take out the disc.
14. Load the check disc (MD) TDYS-1.
15. Turn the = ˜ + knob and display "EF CD ADJUST"
(C12).
[YES]
16. Press the
button and display "EFB =
imposed automatically.
17. Turn the = ˜ + 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)
VC
Specification A = B
of "EFB-
A
B
SAV" will be displayed for
A
B
SAV" will be displayed for
CD". Servo is
A
B
– 27 –
[YES]
18. Press the
button, display "EFB =
ment and save the adjustment results in the non-volatile
memory.
Next "EF CD ADJUST" will be displayed.
[ EJECT]
19. Press the
6
button and take out the disc.
12. FOCUS BIAS ADJUSTMENT
Adjusting Procedure :
1. Load the continuously-recorded disc. (Refer to "5. CREAT-
ING CONTINUOUSLY-RECORDED DISC")
2. Turn the = ˜ + knob and display "CPLAY MODE"
(C29).
[YES]
3. Press the
button and display "CPLAY MID".
[MENU/NO]
4. Press the
button when "C1 =
displayed.
5. Turn the = ˜ + knob and display "FBIAS ADJUST"
(C13).
[YES]
6. Press the
button and display "
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 = ˜ + knob in the clockwise direction and
find the focus bias value at which the C1 error rate becomes
about 200 (Refer to Note 2).
[YES]
8. Press the
button and display "
9. Turn the = ˜ + knob in the counterclockwise direc-
tion and find the focus bias value at which the C1 error rate
becomes about 200.
[YES]
10. Press the
button and display "
11. Check that the C1 error rate is below 50 and ADER is 00.
[YES]
Then press the
button.
12. If the "( )" in "
-
-
button.
[MENU/NO]
If below 20, press the
justment from step 2.
[ EJECT]
13. Press the
6
button and take out the disc.
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
C
SAV" for a mo-
AD =
/
a =
".
/
b =
".
/
c =
".
[YES]
( )" is above 20, press the
button and repeat the ad-
A
Focus bias value
(F. BIAS)
" is
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