46
14. ERROR RATE CHECK
14-1. CD Error Rate Check
Procedure:
1. Load the check disc (TDYS-1).
2. Press the
. m
“R”
or
M >
“R”
button and display
“CPLAY2 MODE” (C36).
3. Press the
ENTER/YES “R”
button twice and display “CPLAY2
MID”.
4. The display changes to “C =
AD =
)”.
5. Check that the C1 error rate is below 20.
6. Press the
MENU/NO “R”
button to stop playback, then press
the
[MD ]
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 40))
2. Press the
. m
“R”
or
M >
“R”
button to display
“CPLAY2 MODE” (C36).
3. Press the
ENTER/YES “R”
button to display “CPLAY2MID”.
4. The display changes to “C1 =
AD =
)”.
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 ]
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 40))
2. Press the
. m
“R”
or
M >
“R”
button to display
“CPLAY2 MODE” (C36).
3. Press the
ENTER/YES “R”
button twice to display “CPLAY2
MID”.
4. Press the
MENU/NO “R”
button when “C1 =
AD =
)”
is displayed.
5. Press the
. m
“R”
or
M >
“R”
button to display
“FBIAS CHECK” (C16).
6. Press the
ENTER/YES “R”
button to display “
/
c =
”.
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 “
/
b =
”.
Check that the C1 error is below 100 and ADER is below 2.
8. Press the
ENTER/YES “R”
button and display “
/
a =
”.
Check that the C1 error is below 100 and ADER is below 2
9. Press the
MENU/NO “R”
button, then press the
[MD ]
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 perform the beginning again.
16. 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.
16-1. CD Auto Gain Control Output Level Adjustment
Procedure:
1. Load the check disc (TDYS-1).
2. Press the
. m
“R”
or
M >
“R”
button to display “AG
Set (CD)” (C11).
3. When the
ENTER/YES “R”
button is pressed, the adjustment
will be 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).
4. Press the
[MD ]
button and take out the check disc.
16-2. MO Auto Gain Control Output Level Adjustment
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Press the
. m
“R”
or
M >
“R”
button to display “AG
Set (MO)” (C10).
3. When the
ENTER/YES “R”
button is pressed, the adjustment
will be 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).
4. Press the
[MD ]
button and take out the test disc.
Z
Z
Z
Z
Z
