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MDS-S9
[
AMS
]
8. Turn the
knob so that the waveform of the
.
>
oscilloscope becomes the specified value.
[
AMS
]
(When the
.
>
knob is turned, the
changes and the waveform changes) In this adjustment, wave-
form 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
[YES]
9. Press the
button, 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.
[
AMS
]
11. Turn 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
[YES]
12. Press the
button, 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.
13. Press the
button and take out the disc.
Z
14. Load the check disc (TDYS-1).
[
AMS
]
15. Turn the
.
>
(C08).
[YES]
16. Press the
button to display "EFB =
imposed automatically.
[
AMS
17. Turn 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
28
of "EFB=
A
B
SAVE" will be displayed
knob until the waveform of the
A
B
SAVE" will be displayed
knob to display "EF CD ADJUST"
CD". Servo is
]
knob so that the waveform of the
A
B
[YES]
18. Press the
button, display "EFB =
ment and save the adjustment results in the non-volatile
"
memory.
Next "EF CD ADJUST" (C08) will be displayed.
19. Press the
button and take out the check disc (TDYS-1).
Z
Adjustment Location: BD board (see page 30)
5-14. FOCUS BIAS ADJUSTMENT
Procedure:
1. Load the continuously-recorded disc. (Refer to "5-6. USING
THE CONTINUOUSLY RECORDED DISC" (See page 23))
[
AMS
2. Turn the
.
(C34).
[YES]
3. Press the
button to display "CPLAY1MID".
[MENU/NO]
4. Press the
displayed.
[
AMS
5. Turn the
.
(C09).
[YES]
6. Press the
button to 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.
[
AMS
7. Turn the
.
focus bias value at which the C1 error rate becomes about 220
(refer to Note 2).
[YES]
8. Press the
button to display "
[
AMS
9. Turn the
.
the focus bias value at which the C1 error rate becomes about
220.
[YES]
10. Press the
button to display "
11. Check that the C1 error rate is below 20 and ADER is 00.
[YES]
Then press the
12. If the "( )" in "
button.
If below 20, press the
justment from step 2.
13. Press the
Z
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
220
B
SAVE" for a mo-
]
>
knob to display "CPLAY1MODE"
button when "C =
]
>
knob to display "FBIAS ADJUST"
/
a =
]
>
knob in the clockwise and find the
/
b =
]
knob in the counterclockwise and find
>
/
c =
button.
-
-
( )" is above 20, press the
[MENU/NO]
button and repeat the ad-
Focus bias value
C
A
AD =
)" is
T".
T".
T".
[YES]
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