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5-13. Error Rate Check
5-13-1. CD Error Rate Check
Checking procedure:
1. Load a check disc (TDYS-1).
The disc is loaded by pushing the tray.
2. Rotate the
l
AMS
L
knob to display “CPLAY1MODE”
(C34).
3. Press the YES button to display “CPLAY1MID”.
4. The display is changed to “C = AD = ”.
5. Confirm that the C1 error rate is below 20.
6. Press the MENU/NO button to stop playing back, and press
the
A
button to eject the check disc.
5-13-2. MO Error Rate Check
Checking procedure:
1. Load a test disc (MDW-74/GA-1).
The disc is loaded by pushing the tray.
2. Rotate the
l
AMS
L
knob to display “CPLAY1MODE”
(C34).
3. Press the YES button to display “CPLAY1MID”.
4. The display is changed to “C = AD = ”.
5. Confirm that the C1 error rate is below 50 and the ADER is
below 2.
6. Press the MENU/NO button to stop playing back, and press
the
A
button to eject the test disc.
5-14. Focus Bias Check
Change the focus bias to check the focus tolerance amount.
Checking procedure:
1. Load the test disc (MDW-74/GA-1).
The disc is loaded by pushing the tray.
2. Rotate the
l
AMS
L
knob to display “CPLAY1MODE”
(C34).
3. Press the YES button to display “CPLAY1MID”.
4. After “C = AD = ” appears, press the MENU/NO
button.
5. Rotate the
l
AMS
L
knob to display “FBIAS CHECK”
(C16).
6. Press the YES button to display “ / c = ”.
The first four digits indicate the C1 error rate, the two digits
after “/” indicate ADER, and the two digits after “c = “ indicate
the focus bias amount.
Confirm that the C1 error is below 50 and the ADER is below
2.
7. Press the YES button to change the display to “ /
b = ”.
Confirm that the C1 error is below 200 and the ADER is below
2.
8. Press the YES button to change the display to “ /
a = ”.
Confirm that the C1 error is below 200 and the ADER is below
2.
9. Press the MENU/NO button and press the
A
button to eject
the test disc.
Note 1 : If the C1 error and ADER are out of the specified value at
points a (step 8) or b (step 7), the focus bias adjustment
may not have been carried out properly. Perform the
adjustment from the beginning again.
5-15. Auto Gain Control Output Level Adjustment
Be sure to perform this adjustment when optical pick-up is replaced.
When result of adjustment ends with the message “Adjust NG!”,
the optical pick-up may be defective. Perform the adjustment again.
5-15-1. CD Auto Gain Control Output Level Adjustment
Adjustment procedure:
1. Load the test disc (TDYS-1).
The disc is loaded by pushing the tray.
2. Rotate the
l
AMS
L
knob to display “AG Set (CD)”
(C11).
3. Press the YES button to start automatic adjustment. After the
adjustment results are saved in the non-volatile memory and
“Complete!” appears, the display is changed to “AG Set (CD)”
(C11) and the adjustments are completed.
4. Press the MENU/NO button and press the !! button to eject the
check disc.
5-15-2. MO Auto Gain Control Output Level Adjustment
Adjustment procedure:
1. Load the test disc (MDW-74/GA-1).
The disc is loaded by pushing the tray.
2. Rotate the
l
AMS
L
knob to display “AG Set (MO)”
(C10).
3. Press the YES button to start automatic adjustment. After the
adjustment results are saved in the non-volatile memory and
“Complete!” appears, the display is changed to “AG Set (MO)”
(C10) and the adjustments are completed.
4. Press the MENU/NO button and press the
A
button to eject
the check disc.