DM-S500 EXP 98.4.26 2:41 PM y[W 2
DM-S500
ADJUSTMENT
4. Press the PLAY key to display OEFBAL MO-W� and after11. Press the PLAY key to display OEFB=##XSA�
that press the PLAY key again to displaymomentarily and save the adjustment result in
"EF=$##MOW".nonvolatile memory. After that, OEFBAL CHAN� is
5. Turn the SHUTTLE so that the waveform on thedisplayed. The disc rotation stops automatically.
oscilloscope satisfies the specified value. (When the
SHUTTLE is turned, the #-marked figure in "EF=$##"Note : The "#" display on the screen indicates an arbitrary
changes and the waveform also changes.)During thisfigure.
adjustment, the oscilloscope changes in units of about
3%. Adjust so that the waveform comes nearest to the12. Press the EJECT key to take out a recordable disc.
specified value. (MO groove read power traverse13. Insert test disc TGYS-1.
adjustment)14. Press the PLAY key to display OEF=$##CD�. A servo is
(Traverse waveform)established automatically.
15. Turn the SHUTTLE so that the waveform on the
oscilloscope comes near to the specified value. During
this adjustment, the waveform changes in units of about
2%. Adjust so that the waveform comes nearest to the
specified value.
(Traverse waveform)
Specification : A = B
6. Press the PLAY key to display "EFB=##XSA"
momentarily. After that, "EF=$##MOR" is displayed.
(Laser power READ power, forcus servo ON, tracking
servo OFF, and spindle(S) servo ON.)
7. Turn the SHUTTLE so that the waveform on theSpecification : A = B
oscilloscope satisfies the specified value. (When the
SHUTTLE is turned, the #-marked figure in "EF-##"16. Press the PLAY key to display OEFB=##XSA�
changes and the waveform also changes.) During thismomentarily and save the adjustment result in
adjustment, the oscilloscope changes in units of aboutnonvolatile memory. After that, OEFBAL ADJU� is
2%. Adjust so that the waveform comes nearest to thedisplayed.
specified value. (MO groove read power traverse17. Press the EJECT key to take out test disc TGYS-1.
adjustment)
(Traverse waveform)
Notes :
1. Data is erased during MO write when a recorded disc is
used for this adjustment.
2. If the traverse waveform is difficult to be monitored,
connect an oscilloscope as shown in the figure below.
Oscilloscope
Specification : A = B
8. Press the PLAY key to display OEFB=##XSA�
330k1
momentarily and save the adjustment result in(TE2)+
nonvolatile memory After that, "EFBAL MO-P" is10pF-
(VC)displayed.
9. Press PLAY key to display "EF=$##MOP".(A pick-up
3-7 Focus bias adjustment
moves automatically to pit block area.)Connection :
10. Turn the SHUTTLE so that the waveform on the
1. Insert a continuously recorded disc (refer to 3-4,
oscilloscope comes near to the specified value. During
OCreating the recordable continuous recording disc�).
this adjustment, the waveform changes in units of about2. Turn the SHUTTLE to display OCPLAY MODE�.
2%. Adjust so that the waveform comes nearest to the3. Press the PLAY key to display OCPLAY MID�.
specified value.
4. Press the STOP key when "C=]]]] a=]] " is
(Traverse waveform)
displayed.
5. Turn the SHUTTLE to display OFBIAS ADJU�.
6. Press the PLAY key to display Oa=## ####/�. The four-
digit figure indicates the C1 error rate, and the two-digit
figure after Oa=� indicates the focus bias value.
Specification : A = B
8 |
ACEC
