Sony HCD-MD5, Руководство по обслуживанию, Страница: 23 / 101

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5-9. ERROR RATE CHECK
5-9-1. CD Error Rate Check
Checking Method:
1. Load a test disc TDYS-1.
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. “C1= AD= – –” is displayed.
5. Check that the C1 error is below 20.
6. Press the EDIT/NO key, stop playback, press the
§
(MD)
key, and remove the test disc.
5-9-2. MO Error Rate Check
Checking Method:
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
Continuously Recorded Disc”.)
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. “C1= AD= ” is displayed.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the EDIT/NO key, stop playback, press the
§
(MD)
key, and remove the continuously recorded disc.
5-10. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Method:
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
Continuously Recorded Disc”.)
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. Press the EDIT/NO key when “C1= AD= ” is
displayed.
5. Turning the MULTI JOG dial and display “FBIAS CHECK”.
6. Press the ENTER/YES key and 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 50 and ADER is 00.
7. Press the ENTER/YES key and display “ / b= ”.
Check that the C1 error is not below 220 and ADER is not above
00 every time.
8. Press the ENTER/YES key and display “ / a= ”.
Check that the C1 error is not below 220 and ADER is not above
00 every time.
9. Press the EDIT/NO key, next press the
§
(MD) key, and re-
move the continuously recorded disc.
Note 1: If the C1 error and ADER are above 00 at points a or b, the
focus bias adjustment may not have been carried out prop-
erly. Adjust perform the beginning again.
5-8. FOCUS BIAS ADJUSTMENT
Adjusting Method:
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
Continuously Recorded Disc”.)
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. Press the EDIT/NO key when “C1= AD= ” is
displayed.
5. Turning the MULTI JOG dial and display “FBIAS ADJUST”.
6. Press the ENTER/YES key and display “ / a= ”.
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. Turning the MULTI JOG dial in the clockwise direction and
find the focus bias value at which the C1 error rate becomes
220.
8. Press the ENTER/YES key and display “ / b= ”.
9. Turning the MULTI JOG dial in the clockwise direction and
find the focus bias value at which the C1 error rate becomes
220.
10. Press the ENTER/YES key and display “ / c= ”.
11. Check that the C1 error rate is below 50 and ADER is 00.
Then press the ENTER/YES key.
12. If the “( )” in “ - - ( )” is above 20, press the
ENTER/YES key.
If below 20, press the EDIT/NO key and repeat the adjustment
from step 2 again.
13. Press the EDIT/NO key and press the
§
(MD) key to remove
the continuously recorded 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 automatically calculated from points a and b.
Note 2: As the C1 error rate changes, perform the adjustment using
the average vale.
C1 error
220
b c b
Focus bias value
(F. BIAS)