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Focus Bias Adjustment
Adjusting Method :
1.
Load a continuously recorded disc (Refer to "Page 18 Creating
Continuously Recorded Disc".).
2.
Press the
,
buttons and display "CPLAY MODE".
3.
Press the n button twice and display "CPLAY MID".
4.
Press the N button when "C1 =
AD =
" is displayed.
5.
Press the
,
buttons and display "FBIAS ADJUST".
6.
Press the n button and 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.
Press the
,
buttons and find the focus bias value at which
the C1 error rate becomes 220.
8.
Press the n button and display "
/
b =
9.
Press the
,
buttons and find the focus bias value at which
the C1 error rate becomes 220.
10. Press the n button and display "
/
c =
11. Check that the C1 error rate is below 50 and ADER is 00. Then
press the n button.
12. If the "(
" in "
-
-
(
" is above 20, press the n
button.
If below 20, press the N button and repeat the adjustment
from step 2 again.
13. Press the § button to remove 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 automatically calculated from points a
T E
and b.
L
1 3 9 4 2 2 9 6 5 1 3
Note 2 : As the C1 error rate changes, perform the adjustment using
the average value.
C1 error
220
Focus bias value
(F. BIAS)
a
b
c
w w w
.
Error Rate Check
CD Error Rate Check
Checking Method :
1.
Load a check disc TGYS-1.
2.
Press the
,
buttons and display "CPLAY MODE".
3.
Press the n button twice and display "CPLAY MID".
4.
"C1 =
AD =
" is displayed.
5.
Check that the C1 error rate is below 20.
Press the N button, stop playback, press the § button, and
6.
".
remove the test disc.
MO Error Rate Check
Checking Method :
1.
Load a continuously recorded disc (Refer to "Page 18 Creating
".
Continuously Recorded Disc".).
2.
Press the
,
buttons and display "CPLAY MODE".
3.
Press the n button twice and display "CPLAY MID".
".
4.
"C1 =
AD =
" is displayed.
5.
If the C1 error rate is below 50, check that ADER is 00.
Press the N button, stop playback, press the § button, and
6.
remove the continuously recorded disc.
Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Method :
1.
Load a continuously recorded disc (Refer to "Page 18 Creating
Continuously Recorded Disc".).
2.
Press the
,
buttons and display "CPLAY MODE".
3.
Press the n button twice and display "CPLAY MID".
4.
Press the N button when "C1 =
5.
Press the
,
buttons and display "FBIAS CHECK".
6.
Press the n 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 00.
7.
Press the n button and display "
Check that the C1 error is not below 220 and ADER is not
above 00 every time.
8.
Press the n button and display "
Check that the C1 error is not below 220 and ADER is not
above 00 every time.
Press the N button, next press the § button, and remove the
9.
continuously recorded disc.
Note 1 : If the C1 error and ADER are above 00 at points a or b,
the focus bias adjustment may not have been carried out
properly. Adjust perform the beginning again.
x
a o
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i
— 21 —
http://www.xiaoyu163.com
8
Adjusting Points and Connecting Points
[BD BOARD] (SIDE A)
Q
Q
3
7
6
3
AD =
" is displayed.
/
c =
".
[BD BOARD] (SIDE B)
/
b =
".
/
a =
".
IC171
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.
http://www.xiaoyu163.com
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4
9
9
8
D101
IC191
1
5
1
5
0
8
9
2
4
(IOP)
(I + 5V)
(VC)
IC101
RV101
TRAVERSE
Adj
RV102
(TEO)
LASER POWER
Adj
IC121
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— 22 —
DPA-300
2
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