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14
Optical Pick-up Height Adjustment
Connection:
MAIN board
TP702 (MNT4)
TP703 (MNT5)
TP703 (MNT5)
TP521 (GND)
+
+
–
oscilloscope
(normal mode)
(CH1)
(CH2)
CLV Jitter Check
Connection:
A
CLV jitter waveform
MAIN board
TP515 (PI)
TP511 (FOUT)
TP501 (VC)
+
+
–
storage
oscilloscope
(normal mode)
(CH2)
(CH1)
Procedure:
1. Connect an oscilloscope to the TP515(PI)(CH1),
1. Connect an oscilloscope to the TP515(PI)(CH1),
TP511(FOUT) (CH2) and TP501(VC) on the MAIN board.
2. Set the Adjustment-1 Mode. (See 5-2. Adjustment-1 Mode in
SECTION 5 (page 11))
3. Set a disc (SATD-S1).
4. Press the [FILTER] button to set the Focus Search mode.
5. Loosen the OP height adjusting screw 1, and while shifting
4. Press the [FILTER] button to set the Focus Search mode.
5. Loosen the OP height adjusting screw 1, and while shifting
the Holder (R2), adjust the height so that the waveform on
oscilloscope satisfies the specified value.
oscilloscope satisfies the specified value.
6. Press the [FILTER] button to set the Play mode.
7. Adjust the TAN skew 2 so as to attain most preferable jitter
7. Adjust the TAN skew 2 so as to attain most preferable jitter
value on the display.
8. Press the [FILTER] button to set the Focus Search mode.
9. Check that the B value of waveform on oscilloscope satisfies
9. Check that the B value of waveform on oscilloscope satisfies
the specification.
10. Repeat steps 5 through 9.
11. Lock the OP height adjusting screw 1 when adjustment fin-
11. Lock the OP height adjusting screw 1 when adjustment fin-
ished.
12. Press the
x
button.
13. Press the
!
button to turn the power off.
Specified Value: B is more than 0, and less than A/3
A
B
VC
VC
PI
FOUT
Procedure:
1. Connect an oscilloscope to the TP702(MNT4)(CH1),
1. Connect an oscilloscope to the TP702(MNT4)(CH1),
TP703(MNT5)(CH2) and TP521(GND) on the MAIN board.
2. Set the Adjustment-2 Mode. (See 5-3. Adjustment-2 Mode in
SECTION 5 (page 11))
3. Set a disc (SATD-S2 or TCD-784).
4. Press the
4. Press the
H
button.
5. Move the sled to the middle track.
• Sled middle track
SATD-S2:TN05
TCD-784:TN05
TCD-784:TN05
6. Check that the A value of waveform on oscilloscope satisfies
the specification.
7. After checking, press the
x
button.
8. Repeat steps 3 through 7 for respective discs.
9. Press the
9. Press the
!
button to turn the power off.
Specified Value:
Disc
A
SATD-S2
55 µsec or less
TCD-784
*1
*1: Normal-trigger the oscilloscope using FOUT on CH2.
2
TAN skew
1
OP height
adjusting screw
adjusting screw
Holder (R2)
Adjustment Location : See page16.
Adjustment Location : See page16.
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