Cd Section - Sony ZS-M30 Service Manual

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. CREATING
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 =
is displayed.
5. Turn the JOG dial to display "FBIAS CHECK".
6. Press the YES/ENTER button to display "
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 "
Check that the C1 error is about 200 and ADER is below 2.
8. Press the YES/ENTER button and display "
Check that the C1 error is about 200 and ADER is below 2.
9. Press the NO/CANCEL button, then press the Z (MD)
button and take out the disc.
If the C1 error and ADER are above other than the speci-
Note 1:
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.

5-3. CD SECTION

Set the CD test mode when performing confirmations.
After completing the confirmation, release the CD test mode.
In the CD test mode, the set works as following sequence.
CD test mode sequence:
AD = "
/ c = ".
Enter the
CD test mode
/ b = ".
Press the
x (CD) button
/ a = ".
Press the u ,(CD)
button.
Press the u ,(CD)
button.
Press the u ,(CD)
button.
Press the u ,(CD)
button.
Press the u ,(CD)
button.
Press the u ,(CD)
button.
CD test mode
Press the
u (CD) button
CD
1.
test mode 1
Press the
u (CD) button
CD
2.
test mode 2
Press the
x (CD) button
3. STOP mode 2
Press the x (CD)
button.
4. FOCUS mode
Press the x (CD)
button.
5. ALL SERVO
ON mode
Press the x (CD)
button.
6. LPC OFF
mode
Press the x (CD)
button.
7. TRACKING
GAIN UP mode
Press the x (CD)
button.
8. High speed
mode
ZS-M30
25