Sony PMC-MD55 - Md Boombox, Руководство по обслуживанию

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17. Press the
[YES, ENTER]
button, display “EFB = SAVE”
for a moment and save the adjustment results in the non-vola-
tile memory.
Next “EFBAL ADJUST” will be displayed.
18. Press the
[MD EJECT ]
button and take out the disc.
10. FOCUS BIAS ADJUSTMENT
Adjusting Procedure :
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
ING CONTINUOUSLY-RECORDED DISC”)
2. Turn the JOG dial to display “CPLAY MODE”.
3. Press the
[YES, ENTER]
button to display “CPLAY MID”.
4. Press the
[NO, CANCEL]
button when “C1 = AD = ”
is displayed.
5. Turn the JOG dial to display “FBIAS ADJUST”.
6. Press the
[YES, ENTER]
button to 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. Turn the JOG dial clockwise and find the focus bias value at
which the C1 error rate becomes about 200 (Refer to Note 2).
8. Press the
[YES, ENTER]
button to display “ / b = ”.
9. Turn the JOG dial counterclockwise and find the focus bias
value at which the C1 error rate becomes about 200.
10. Press the
[YES, ENTER]
button to display “ / c = ”.
11. Check that the C1 error rate is below 50 and ADER is 00.
Then press the
[YES, ENTER]
button.
12. If the “( )” in “ - - ( )” is above 20, press the
[YES, ENTER]
button.
If below 20, press the
[NO, CANCEL]
button and repeat the
adjustment from step 2.
13. Press the
[MD EJECT ]
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 vale.
11. ERROR RATE CHECK
11-1. CD Error Rate Check
Checking Procedure :
1. Load the check disc (MD) TDYS-1.
2. Turn the
JOG dial and display “CPLAY MODE”.
3. Press the
[YES, ENTER]
button twice and display “CPLAY
MID”.
4. The display changes to “C1 = AD = ”.
5. Check that the C1 error rate is below 20.
6. Press the
[NO, CANCEL]
button to stop playback, then press
the
[MD EJECT ]
button and take out the check disc.
11-2. MO Error Rate Check
Checking Procedure :
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
ING CONTINUOUSLY-RECORDED DISC”)
2. Turn the JOG dial to display “CPLAY MODE”.
3. Press the
[YES, ENTER]
button to display “CPLAY MID”.
4. The display changes to “C1 = AD = ”.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the
[NO, CANCEL]
button to stop playback, then press
the
[MD EJECT ]
button and take out the test disc.
12. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
ING CONTINUOUSLY-RECORDED DISC”)
2. Turn the JOG dial to display “CPLAY MODE”.
3. Press the
[YES, ENTER]
button twice to display “CPLAY
MID”.
4. Press the
[NO, CANCEL]
button when “C1 = AD = ”
is displayed.
5. Turn the JOG dial to display “FBIAS CHECK”.
6. Press the
[YES, ENTER]
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 50 and ADER is below 2.
7. Press the
[YES, ENTER]
button and display “ / b = ”.
Check that the C1 error is about 200 and ADER is below 2.
8. Press the
[YES, ENTER]
button and display “ / a = ”.
Check that the C1 error is about 200 and ADER is below 2
9. Press the
[NO, CANCEL]
button, then press the
[MD EJECT ]
button and take out the disc.
Note 1: 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.
6
6
C1 error
about
200
B C A Focus bias value
(F. BIAS)
6
6
6