Sony HCD-C5 Focus Bias Adjustment, Focus Bias Check, CD Error Rate Check, MO Error Rate Check

13. FOCUS BIAS ADJUSTMENT

Procedure:

1.Load the continuously-recorded disc. (Refer to “5. USING THE CONTINUOUSLY RECORDED DISC” (See page 37))

2.Press the . “R” or >“R” button to display “CPLAY 1 MODE” (C34).

3.Press the ENTER/YES “R” button to display “CPLAY 1MID”.

4.Press the MENU/NO “R” button when “C = = ” is displayed.

5.Press the . “R” or > “R” button to display “FBIAS ADJUST” (C09).

6.Press the ENTER/YES “R” button to display “ / a =

T”.

The first four digits indicate the C1 error rate, the two digits after “/ ” indicate ADER, and the 2 digits after “a =” indicate the focus bias value.

7.Press the > “R” button and find the focus bias value at which the C1 error rate becomes about 220 (refer to Note 2).

8.Press the ENTER/YES “R” button to display “ / b =

T”.

9.Press the . “R” button and find the focus bias value at which the C1 error rate becomes about 220.

10.Press the ENTER/YES “R” button to display “ / c =

T”.

11.Check that the C1 error rate is below 20 and ADER is 00. Then press the ENTER/YES “R” button.

12.If the “()” in “ - - ()” is above 20, press the

ENTER/YES “R” button.

If below 20, press the MENU/NO “R” button and repeat the adjustment from step 2.

13.Press thet MD Z button and take out the disc.

Note 1: The relation between the C1 error and focus bias is as shown in the following figure. Find points A and B in the following figure using the above adjustment. The focal point position C is auto- matically calculated from points A and B.

Note 2: As the C1 error rate changes, perform the adjustment using the average value.

C1 error

about 220

Focus bias value

BCA

HCD-C5

14. ERROR RATE CHECK

14-1. CD Error Rate Check

Procedure:

1.Load the check disc (TDYS-1).

2.Press the . “R” or >“R” button and display “CPLAY 1 MODE” (C34).

3.Press the ENTER/YES “R” button and display “CPLAY 1 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 Z 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 37))

2.Press the . “R” or >“R” button to display “CPLAY 1 MODE” (C34).

3.Press the ENTER/YES “R” button to display “CPLAY 1MID”.

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 Z 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 37))

2.Press the . “R” or > “R” button to display “CPLAY 1 MODE” (C34).

3.Press the ENTER/YES “R” button twice to display “CPLAY 1 MID”.

4. Press the	MENU/NO “R”	button when “C1 =	AD =
)” is displayed.

5.Press the . “R” or > “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 about 100 and ADER is below 2.

8. Press the ENTER/YES “R” button and display “ / a = ”.

Check that the C1 error is about 100 and ADER is below 2

9.Press the MENU/NO “R” button, then press the MD Z 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 from the beginning again.

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