Sony MDS-PC3 Error Rate Check, Focus Bias Check, Auto Gain Control Output Level Adjustment

5-14. ERROR RATE CHECK

5-14-1. CD Error Rate Check

Checking Procedure :

1.Load a check disc (MD) TDYS-1.

2.Rotate the AMS knob and display “CPLAY1MODE” (C34).

3.Press the @/1 button twice and display “CPLAY1 MID”.

4.The display changes to “C = AD = )”.

5.Check that the C1 error rate is below 20.

6.Press the x/Z button, stop playback, press the x/Z “PGM” button, and remove the test disc.

5-14-2. MO Error Rate Check

Checking Procedure :

1.Load a continuously recorded test disc (MDW-74/GA-1). (Refer to “5-5. Using the Continuously Recorded Disc”.)

2.Rotate the AMS knob and display “CPLAY1MODE” (C34).

3.Press the @/1 button and display “CPLAY1 MID”.

4.The display changes to “C = AD = )”.

5.If the C1 error rate is below 20, check that ADER is 00.

6.Press the x/Z button, stop playback, press the x/Z “PGM” button, and remove the test disc.

5-15. FOCUS BIAS CHECK

Change the focus bias and check the focus tolerance amount.

Checking Procedure :

1.Load a continuously recorded test disc (MDW-74/GA-1). (Refer to “5-5. Using the Continuously Recorded Disc”.)

2.Rotate the AMS knob and display “CPLAY1MODE” (C34).

3.Press the @/1 button twice and display “CPLAY1 MID”.

4. Press the	x/Z	button when “C =	AD = )” is dis-
played.

5.Rotate the AMS knob and display “FBIAS CHECK” (C16).

6.Press the @/1 button and display “ / c = ”.

The first four digits indicate the C error rate, the two digits after [/] indicate ADR, and the 2 digits after [c =] indicate the focus bias value.

Check that the C error is below 20 and ADER is below 2.

7.Press the @/1 button and display “ / b = ”. Check that the C error is below 100 and ADER is below 2.

8.Press the @/1 button and display “ / a = ”. Check that the C error is below 100 and ADER is below 2

9.Press the x/Z button, next press the x/Z “PGM” button, and remove the continuously recorded disc.

Note 1 : If the C error and ADER are above other than the speci- fied 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 properly. Adjust perform the beginning again.

5-16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT

Be sure to perform this adjustment when the optical pick-up is re- placed.

If the adjustment results becomes “Adjust NG!”, the optical pick- up may be faulty or the servo system circuits may be abnormal.

5-16-1. CD Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Insert the check disc (MD) TDYS-1.

2.Rotate the AMS knob to display “AG Set (CD)” (C11).

3.When the @/1 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 x/Z “PGM” button to remove the disc.

5-16-2. MO Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Insert the reference disc (MDW-74/GA-1) for recording.

2.Rotate the AMS knob to display “AG Set (MO)” (C10).

3.When the @/1 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 x/Z “PGM” button to remove the disc.

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