Sony MDS-JA333ES Service Manual page 31

5-6-4. Focus Bias Check
Change the focus bias to check the focus tolerance amount.
Checking procedure:
1. Load the test disc (MDW-74/GA-1).
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display "CPLAY1MODE"
(C34).
3. Press the YES button to display "CPLAY1MID".
4. After "C = AD =
button.
5. Rotate the lAMSL knob to display "FBIAS CHECK"
(C16).
6. Press the YES button to display "
The first four digits indicate the C1 error rate, the two digits
after "/" indicate ADER, and the two digits after "c = " indicate
the focus bias amount.
Confirm that the C1 error is below 220 and the ADER is below
2.
7. Press the YES button to change the display to "
= ".
Confirm that the C1 error is below 220 and the ADER is below
2.
8. Press the YES button to change the display to "
= ".
Confirm that the C1 error is below 220 and the ADER is below
2.
9. Press the MENU/NO button and press the A button to eject
the test disc.
5-6-5. C PLAY Check
MO Error rate check
Checking procedure:
1. Load a test disc (MDW-74/GA-1).
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display "CPLAY1MODE"
(C34).
3. Press the YES button to display "CPLAY1MID".
4. The display is changed to "C =
5. Confirm that the C1 error rate is below 80 and the ADER is
below 2.
6. Press the MENU/NO button to stop playing back. Press the A
button to eject the test disc.
CD Error rate check
Checking procedure:
1. Load a check disc (TDYS-1).
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display "CPLAY1MODE"
(C34).
3. Press the YES button to display "CPLAY1MID".
4. The display is changed to "C =
5. Confirm that the C1 error rate is below 50.
6. Press the MENU/NO button to stop playing back. Press the A
button to eject the check disc.
" appears, press the MENU/NO
/ c = ".
/
/
AD = ".
AD = ".
5-6-6. Self Record/Playback Check
• The error rate is checked using the self record/playback disc.
Manufacture the self record/playback disc by user locally using
the MDS-JA333ES that is going to be measured of its error rate
by means of continuous recording.
Checking procedure:
1. Load a recordable disc (blank disc) into the unit.
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display "CREC 1MODE"
(C35).
3. Press the YES button to display "CREC 1MID".
4. When recording starts, the message
message changed to "CREC (@@@@" (@@@@ is an address)
and recording starts.
5. After one minute, press the MENU/NO button to stop continuos
recording.
6. Rotate the lAMSL knob to display "CPLAY1MODE"
(C34).
b 7. Press the YES button to display "CPLAY1MID".
8. Display "C =
9. Confirm that the C1 error rate is below 80 and the AD error rate
is below 2.
10. Press the MENU/NO button to stop playing back. Press the A
a
button to eject the check disc.
5-7. Returning to Initial Setup of Adjustment Value
Note:
The adjustment result that is stored in the non-volatile memory is
all cleared and returned to the initial setup value when procedure is
performed. However, the adjustment result of the temperature
compensation offset adjustment remains unchanged.
When this procedure is performed, be sure to perform all adjustments
from very beginning to the end again except the temperature
compensation offset adjustment. Perform this procedure as
necessary before starting adjustment referring to section "5-4.
Precautions for Adjustments".
Setting procedure:
1. Rotate the lAMSL knob to display "ADJ CLEAR"
(C28).
2. After pressing the YES button, "Complete!" appears for a
moment and the initial setting is started. Then, "ADJ CLEAR"
(C28) appears.
appears and the
REC
AD = ".
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