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5-15. ERROR RATE CHECK
5-15-1. CD Error Rate Check
Procedure:
1. Load the check disc (TDYS-1).
[
AMS
]
2. Turn the
.
>
(C34).
[YES]
3. Press the
button twice and display "CPLAY1MID".
4. The display changes to "C =
5. Check that the C1 error rate is below 20.
[MENU/NO]
6. Press the
button to stop playback, then press
the
button and take out the check disc (TDYS-1).
Z
5-15-2. MO Error Rate Check
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".
4. The display changes to "C =
5. If the C1 error rate is below 20, check that ADER is 00.
[MENU/NO]
6. Press the
button to stop playback, then press
the
button and take out the disc.
Z
5-16. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
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 twice to display "CPLAY1MID".
[MENU/NO]
4. Press the
button when "C =
displayed.
[
AMS
]
5. Turn the
.
>
(C16).
[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 "c =" indicate
the focus bias value.
Check that the C1 error is below 20 and ADER is below 2.
[YES]
7. Press the
button and display "
Check that the C1 error is below 100 and ADER is below 2.
[YES]
8. Press the
button and display "
Check that the C1 error is below 100 and ADER is below 2
[MENU/NO]
9. Press the
button, then press the
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 perform the beginning again.
knob to display "CPLAY1MODE"
AD =
)".
knob to display "CPLAY1MODE"
AD =
)".
knob to display "CPLAY1MODE"
AD =
knob to display "FBIAS CHECK"
/
c =
T".
/
b =
T".
/
a =
T".
button and
Z
5-17. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT
Be sure to perform this adjustment when the optical pick-up is
replaced.
If the adjustment results becomes "Adjust NG!", the optical pick-
up may be faulty or the servo system circuits may be abnormal.
5-17-1. CD Auto Gain Control Output Level Adjustment
Procedure:
1. Load the check disc (TDYS-1).
[
AMS
2. Turn the
.
[YES]
3. When the
formed automatically.
"Complete!!" will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to "AG Set (CD)" (C11).
4. Press the
Z
button and take out the check disc (TDYS-1).
5-17-2. MO Auto Gain Control Output Level Adjustment
Procedure:
1. Load the test disc (MDW-74/GA-1).
[
AMS
2. Turn the
.
[YES]
3. When the
formed automatically.
"Complete!!" will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to "AG Set (MO)" (C10).
4. Press the
button and take out the test disc
Z
(MDW-74/GA-1).
)" is
]
>
knob to display "AG Set (CD)" (C11).
button is pressed, the adjustment will be per-
]
>
knob to display "AG Set (MO)" (C10).
button is pressed, the adjustment will be per-
MDS-S9
29
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