Sony HCD-MD1EX - System Service Manual page 29

6-9. ERROR RATE CHECK
6-9-1. CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
[VOLUME+/–]
2. Press the
3. Press the p (CD) button to display "CPLAY MID".
4. "C = AD = " is displayed.
5. Check that the C1 error rate is below 20.
6. Press the ^ (CD) button to stop playback. Then press the
6 (MD) button, and remove the check disc (MD).
6-9-2. MO Error Rate Checking
Checking Procedure :
1. Load a continuously recorded disc (Refer to 6-4. Creating the
Continuously Recorded Disc").
[VOLUME+/–]
2. Press the
3. Press the p (CD) button to display "CPLAY MID".
4. "C = AD = " is displayed.
5. Check that the C1 error rate is below 50 and ADER is 00.
6. Press the ^ (CD) button to stop playback. Then press the
6 (MD) button, and remove the disc.
6-10. FOCUS BIAS CHECK
Change the focus bias value and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded disc (Refer to 6-4. Creating the
Continuously Recorded Disc").
[VOLUME+/–]
2. Press the
3. Press the p (CD) button to display "CPLAY MID".
4. When "C = AD =
button.
[VOLUME+/–]
5. Press the
6. Press the p (CD) button to display "
The first four digits indicate the C1 error, the two digits after
the "/" indicate ADER and the two digits after "c =" indicate
the focus bias value.
Check that the C1 error is below 50 and ADER is 00.
7. Press the p (CD) button to change the display to "
= ".
Check that the C1 error does not drop below about 200 and
ADER does not remain above 00.
8. Press the p (CD) button to change the display to "
= ".
Check that the C1 error does not drop below about 200 and
ADER does not remain above 00.
9. Press the ^ (CD) button, press the 6 (MD) button next,
and remove the continuously recorded disc.
Note 1: If the C1 error is above about 200 or ADER is above 00 only for
point a (step 8 above) and point b (step 7 above), the focus bias
may not adjusted properly. In this case, adjust again.
button to display "CPLAY MODE".
button to display "CPLAY MODE".
button to display "CPLAY MODE".
" is displayed, press the ^ (CD)
button to display "FBIAS CHECK".
/ c = ".
/ b
/ a
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