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MDS-NT1
5-15. ERROR RATE CHECK
5-15-1. CD Error Rate Check
Checking Procedure:
1. Load the check disc (MD) TDYS-1.
[JOG UP]
[JOG DOWN]
2. Click the
or
MODE" (C36).
[ENTER/YES]
3. Click the
twice and display "CPLAY2MID".
4. The display changes to "C =
5. Check that the C1 error rate is below 20.
[MENU/NO]
6. Click the
to stop playback, then click the
and take out the check disc.
5-15-2. MO Error Rate Check
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to "5-6. USING
THE CONTINUOUSLY RECORDED DISC")
[JOG UP]
[JOG DOWN]
2. Click the
or
MODE" (C36).
[ENTER/YES]
3. Click the
to display "CPLAY2MID".
4. The display changes to "C =
5. If the C1 error rate is below 20, check that ADER is 00.
[MENU/NO]
6. Click the
[EJECT]
and take out the test disc.
5-16. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to "5-6. USING
THE CONTINUOUSLY RECORDED DISC")
[JOG UP]
[JOG DOWN]
2. Click the
or
MODE" (C36).
[ENTER/YES]
3. Click the
twice to display "CPLAY2MID".
[MENU/NO]
4. Click the
when "C =
[JOG UP]
[JOG DOWN]
5. Click the
or
CHECK" (C16).
[ENTER/YES]
6. Click the
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.
[ENTER/YES]
7. Click the
and display "
Check that the C1 error is about 100 and ADER is below 2.
[ENTER/YES]
8. Click the
and display "
Check that the C1 error is about 100 and ADER is below 2
[MENU/NO]
9. Click the
, then click the
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.
34
to display "CPLAY2
AD =
".
[EJECT]
to display "CPLAY2
AD =
".
to stop playback, then click the
to display "CPLAY2
AD =
" is displayed.
to display "FBIAS
/
c =
".
/
b =
".
/
a =
".
[EJECT]
and take out
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
Adjusting Procedure:
1. Load the check disc (MD) TDYS-1.
[JOG UP]
[JOG DOWN]
2. Click the
or
(C11).
[ENTER/YES]
3. When the
performed 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).
[EJECT]
4. Click the
and take out the check disc.
5-17-2. MO Auto Gain Control Output Level Adjustment
Adjusting Procedure:
1. Load the test disc (MDW-74/GA-1).
[JOG UP]
[JOG DOWN]
2. Click the
or
(MO)" (C10).
[ENTER/YES]
3. When the
performed 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).
[EJECT]
4. Click the
and take out the test disc.
to display "AG Set (CD)"
is clicked, the adjustment will be
to display "AG Set
is clicked, the adjustment will be
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