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Traverse Adjustment
Connection :
Oscilloscope
11. Rotate the AMS knob until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 3%. Adjust the waveform so that the specified value is satisfied as much as possible. (Traverse Waveform)
BD board TP (TEO) TP (VC) VC
A
Adjusting method : 1. Connect an oscilloscope to TP (TEO) and TP (VC) of the BD board. 2. Load a MO disc (any available on the market). 3. Press the 0 button or ) button and move the optical pickup outside the pit. 4. Rotate the AMS knob and display �EFBAL ADJUS�. 5. Press the YES button and display �EFBAL MO-W�. (Laser power WRITE power/Focus servo ON/tracking servo OFF/spindle (S) servo ON) 6. Adjust RV101 of the BD board so that the waveform of the oscilloscope becomes the specified value. (MO groove write power traverse adjustment) (Traverse Waveform)
A VC B Specification A = B
B
Specification A=B
12. Press the YES button, display �EFB = $ SAV� for a moment and save the adjustment results in the non-volatile memory. Next �EFBAL CD� is displayed. The disc stops rotating automatically. 13. Press the §OPEN/CLOSE button and remove the MO disc. 14. Load the check disc (MD) TDYS-1. 15. Press the YES button and display �EFB = $ CD�. Servo is imposed automatically. 16. Rotate the AMS knob so that the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 3%. Adjust the waveform so that the specified value is satisfied as much as possible. (Traverse Waveform)
A
7. Press the YES button and display �EFB = $ (Laser power : MO reading)
MO-R�.
VC B Specification A=B
8. Rotate the AMS knob so that the waveform of the oscilloscope becomes the specified value. (When the AMS knob is rotated, the of �EFB = $ � changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 3%. Adjust the waveform so that the specified value is satisfied as much as possible. (MO groove read power traverse adjustment) (Traverse Waveform)
17. Press the YES button, display �EFB = $ SAV� for a moment and save the adjustment results in the non-volatile memory. Next �EFBAL ADJUS� is displayed. 18. Press the §OPEN/CLOSE button and remove the test disc TDYS-1. Note 1 : Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2 : If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly.
Oscilloscope
A VC B
Specification A=B
9. Press the YES button, display �EFB = $ SAV� for a moment and save the adjustment results in the non-volatile memory. Next �EFBAL MO-P� is displayed. 10. Press the YES button and display �EFB = $ MO-P�. The optical pick-up moves to the pit area automatically and servo is imposed.
BD board TP (TEO) TP (VC)
330k�
10pF
� 34 �
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