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14. ERROR RATE CHECK
14-1. CD Error Rate Check
Checking Procedure:
1. Load the check disc (MD) TDYS-1.
2. Turn the [ AMS ] (MD) knob to display “CPLAY2
MODE” (C36).
3. Press the [YES] button twice and display “CPLAY2MID”.
4. The display changes to “C = AD = ”.
5. Check that the C1 error rate is below 20.
6. Press the [MENU/NO] button to stop playback, then press the
[ EJECT] button and take out the check disc.
14-2. MO Error Rate Check
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
THE CONTINUOUSLY RECORDED DISC”)
2. Turn the [ AMS ] (MD) knob to display “CPLAY2
MODE” (C36).
3. Press the [YES] 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] button to stop playback, then press the
[ EJECT] button and take out the test disc.
15. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
THE CONTINUOUSLY RECORDED DISC”)
2. Turn the [ AMS ] (MD) knob to display “CPLAY2
MODE” (C36).
3. Press the
[YES] button twice to display “CPLAY2MID”.
4. Press the [MENU/NO] button when “C1 = AD = ” is
displayed.
5. Turn the [ AMS ] (MD) 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 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 [YES] button and display “ / b = ”.
Check that the C1 error is about 100 and ADER is below 2.
8. Press the [YES] button and display “ / a = ”.
Check that the C1 error is about 100 and ADER is below 2
9. Press the [MENU/NO] button, then press the [ EJECT] but-
ton 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
Adjusting Procedure:
1. Load the check disc (MD) TDYS-1.
2. Turn the [ AMS ] (MD) knob to display “AG Set
(CD)” (C11).
3. When the [YES] button is pressed, the adjustment will be per-
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 [ EJECT] button and take out the check disc.
16-2. MO Auto Gain Control Output Level Adjustment
Adjusting Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Turn the [ AMS ] (MD) knob to display “AG Set
(MO)” (C10).
3. When the [YES] button is pressed, the adjustment will be per-
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 [ EJECT] button and take out the test disc.
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