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8.
FOCUS BIAS ADJUSTMENT
Adjusting Method:
1. Load a continuously recorded disc (Refer to "4. Creating MO
Continuously Recorded Disc") to slot 1.
[
SELECTOR
=
2. Turn the
MODE".
[ENTER/YES]
3. Press the
button and display "CPLAY MID".
[MENU/NO]
4. Press the
button when "C =
displayed.
[
SELECTOR
=
5. Turn the
ADJUST".
[ENTER/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.
[
SELECTOR
=
7. Turn right the
bias value at which the C1 error rate becomes 220. (Refer to
note 2.)
[ENTER/YES]
8. Press the
button and display "
".
[
SELECTOR
=
9. Turn left the
cus bias value at which the C1 error rate becomes 220. (Refer
to note 2.)
[ENTER/YES]
10. Press the
button and display "
".
11. Check that the C1 error rate is below 50 and ADER is 00.
[ENTER/YES]
Then press the
12. If the "(
)" in "
-
-
[ENTER/YES]
button.
[MENU/NO]
If below 20, press the
justment from step 2 again.
[REPEAT]
button and press the § button to remove
13. Press the
the continuously recorded 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
220
b
c
]
+
dial and display "CPLAY
AD =
)" is
]
+
dial and display "FBIAS
/
a =
]
+
dial and find the focus
/
b =
]
+
dial and find the fo-
/
c =
button.
(
)" is above 20, press the
button and repeat the ad-
Focus bias value
(F. BIAS)
a
– 17 –
9.
ERROR RATE CHECK
9-1. CD Error Rate Check
Checking Method:
1. Load a test disc TDYS-1 to slot 1.
[
SELECTOR
=
2. Turn the
MODE".
[ENTER/YES]
3.
Press the
button and display "CPLAY MID".
4. "C =
AD =
)" is displayed.
5. Check that the C1 error is below 20.
[MENU/NO]
6. Press the
button, stop playback, press the
[REPEAT]
button, and remove the test disc.
9-2. MO Error Rate Check
Checking Method:
1. Load a continuously recorded disc (Refer to "4. Creating MO
Continuously Recorded Disc") to slot 1.
[
SELECTOR
=
2. Turn the
MODE".
[ENTER/YES]
3. Press the
button and display "CPLAY MID".
4. "C =
AD =
)" is displayed.
5. If the C1 error is below 50, check that ADER is 00.
[MENU/NO]
button, stop playback, press the §
6. Press the
button, and remove the continuously recorded disc.
(To exit from the TEST mode, press the
10. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Method:
1. Load a continuously recorded disc (Refer to "4. Creating MO
Continuously Recorded Disc".).
[
SELECTOR
=
2. Turn the
MODE".
[ENTER/YES]
3. Press the
button and display "CPLAY MID".
[MENU/NO]
4. Press the
button when "C =
displayed.
[
SELECTOR
=
5. Turn the
CHECK".
[ENTER/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 [c=] indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is 02.
[ENTER/YES]
7. Press the
button and display "
".
Check that the C1 error is not below 220 and ADER is not
above 02 every time.
[ENTER/YES]
8. Press the
button and display "
".
Check that the C1 error is not below 220 and ADER is not
above 02 every time.
[MENU/NO]
button, next press the § button, and
9. Press the
remove the continuously recorded disc.
Note 1: If the C1 error and ADER are above 02 at points a or b, the focus
bias adjustment may not have been carried out properly. Adjust
perform the beginning again.
]
+
dial and display "CPLAY
]
+
dial and display "CPLAY
[REPEAT]
button.)
]
+
dial and display "CPLAY
AD =
)" is
]
+
dial and display "FBIAS
/
c =
/
b =
/
a =
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