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13. FOCUS BIAS ADJUSTMENT
Procedure:
1. Load the continuously-recorded disc. (Refer to "5. USING
THE CONTINUOUSLY RECORDED DISC" (See page 37))
2. Press the . "R" or > "R" button to display "CPLAY 1
MODE" (C34).
3. Press the ENTER/YES "R" button to display "CPLAY 1MID".
4. Press the MENU/NO "R" button when "C =
displayed.
5. Press the . "R" or > "R" button to display "FBIAS
ADJUST" (C09).
6. Press the ENTER/YES "R" button to display "
T".
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 > "R" button and find the focus bias value at
which the C1 error rate becomes about 220 (refer to Note 2).
8. Press the ENTER/YES "R" button to display "
T".
9. Press the . "R" button and find the focus bias value at
which the C1 error rate becomes about 220.
10. Press the ENTER/YES "R" button to display "
T".
11. Check that the C1 error rate is below 20 and ADER is 00. Then
press the ENTER/YES "R" button.
12. If the "(
)" in "
-
ENTER/YES "R" button.
If below 20, press the MENU/NO "R" button and repeat the
adjustment from step 2.
13. Press thet MD 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 value.
C1 error
about
220
B
C
=
/
/
/
-
(
)" is above 20, press the
Focus bias value
A
14. ERROR RATE CHECK
14-1. CD Error Rate Check
Procedure:
1. Load the check disc (TDYS-1).
2. Press the . "R" or > "R" button and display "CPLAY 1
MODE" (C34).
3. Press the ENTER/YES "R" button and display "CPLAY 1
" is
MID".
4. The display changes to "C =
5. Check that the C1 error rate is below 20.
6. Press the MENU/NO "R" button to stop playback, then press
a =
the MD Z button and take out the check disc.
14-2. MO Error Rate Check
Procedure:
1. Load the continuously-recorded disc. (Refer to "5. USING THE
CONTINUOUSLY RECORDED DISC" (See page 37))
b =
2. Press the . "R" or > "R" button to display "CPLAY 1
MODE" (C34).
3. Press the ENTER/YES "R" button to display "CPLAY 1MID".
4. The display changes to "C1 =
c =
5. If the C1 error rate is below 20, check that ADER is 00.
6. Press the MENU/NO "R" button to stop playback, then press
the MD Z button and take out the disc.
15. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Procedure:
1. Load the continuously-recorded disc. (Refer to "5. USING
THE CONTINUOUSLY RECORDED DISC" (See page 37))
2. Press the . "R" or > "R" button to display "CPLAY 1
MODE" (C34).
3. Press the ENTER/YES "R" button twice to display "CPLAY
1 MID".
4. Press the MENU/NO "R" button when "C1 =
)" is displayed.
5. Press the . "R" or > "R" button to display "FBIAS
CHECK" (C16).
6. Press the ENTER/YES "R" button to 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 20 and ADER is below 2.
7. Press the ENTER/YES "R" button and display "
=
".
Check that the C1 error is about 100 and ADER is below 2.
8. Press the ENTER/YES "R" button and display "
=
".
Check that the C1 error is about 100 and ADER is below 2
9. Press the MENU/NO "R" button, then press the MD Z button
and take out the disc.
Note:
If the C1 error and ADER are above other than the specified
value at points a (step 8. in the above) or b (step 7. in the above),
the focus bias adjustment may not have been carried out prop-
erly. Adjust from the beginning again.
HCD-C5
AD =
)".
AD =
)".
AD =
/
c =
/
b
/
a
43
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