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7. Turn the SHUTTLE clockwise and detect the focus bias
value in which the C1 error rate becomes 220.
8. Press the PLAY key to display "b=## ####/".
9. Turn the SHUTTLE counterclockwise and detect the
focus bias value in which the C1 error rate becomes
220.
10. Press the PLAY key to display "C=## ####/".
11. Confirm that the C1 error rate at that time is less than
50, then press the PLAY key.
12. The display appears "
and save the adjustment result in nonvolatile memory.
After that "FBIAS ADJU" is displayed.
13. Press the EJECT key to take out a continuous recording
disc.
Notes :
1. The relation between the C1 error and focus bias value
is shown in the figure below. Points "a" and "b" in the
figure are detected by the above adjustment. Focal
position "C" is automatically obtained from points "a" and
"b" by calculation.
2. The C1 error rate fluctuates. Therefore, perform the
adjustment according to the observed mean value.
C1 error
ADJUSTMENT
–
–
( X " momentarily
Focus bias value
3-8 Error rate confirmation
3-8-1 CD error rate confirmation
Confirmation :
1. Insert test disc TGYS-1.
2. Turn the SHUTTLE to display "CPLAY MODE".
3. Press the PLAY key to display "CPLAY MID".
4. "C=#### a=##" is displayed.
5. Confirm that the C1 error rate is less than 20.
6. Press the STOP key to stop the playback, than press the
EJECT key to take out a test disc.
3-8-2 MO error rate confirmation
1. Insert a continuously recorded disc ( refer to 3-4,
"Creating the recordable continuous recording disc")
2. Turn the SHUTTLE to display "CPLAY MODE".
3. Press the PLAY key to display "CPLAY MID".
4. "C=#### a=##" is displayed.
5. Confirm that the C1 error rate is less than 50 and that
ADIP error rate is 00.
6. Press the STOP key to stop the playback, then press the
EJECT key to take out a test disc.
Note : The "#" display on the screen indicates an arbitrary
figure.
DM-S500
9
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