7.Then, rotate the AMS knob and display “LDPWR CHECK”.
8.Press the YES button once and display “0.9 mW *** $ ”. Check that the reading of the laser power meter become 0.85 to 0.91 mW. (*** means IOP value)
9.Press the YES button once more and display “7.0 mW *** $
”. Check that the reading the laser power meter and digital volt meter satisfy the specified value.
Note down the digital voltmeter reading value.
Specified Value :
Laser power meter reading : 7.0 ± 0.1 mW
Digital voltmeter reading : Optical
(Optical pick-up label)
KMS260A | (For details of the method for checking | |
27X40 | this value, refer to | |
Displaying IOP Information”.) | ||
B0825 | ||
| ||
|
| |
N |
|
Iop = 82.5 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 (Ω)
10.Press the MENU/NO button and display “LDPWR CHECK” and stop the laser emission.
(The MENU/NO button is effective at all times to stop the laser emission.)
11.Rotate the AMS knob to display “Iop.Write”.
12.Press the YES button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the YES button to display “Measu=@@@.@” (@ is an arbitrary number).
13.The numbers which can be changed will blink. Input the Iop value noted down at step 9.
To select the number : Rotate the AMS knob.
To select the digit : Press the AMS knob
14.When the YES button is pressed, “Complete!” will be displayed momentarily. The value will be recorded in the
Note 1: After step 4, each time the YES button is pressed, the display will be switched between “0.7 mW *** $ ”, “6.2
mW *** $ ”, and “Wp *** $ ”. Nothing needs to be performed here.
5-11. TRAVERSE ADJUSTMENT
Connection :
Oscilloscope
BD board
CN110 pin 3 (TE)
CN110 pin 1 (VC)
V : 0.5 V/div
H : 10 ms/div
Input : DC mode
Adjusting Procedure :
1.Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin 1 (VC) of the BD board.
2.Load a disc (any available on the market). (Refer to Note 1.)
3.Press the ) button and move the optical
4.Rotate the AMS knob and display “EF MO ADJUST”.
5.Press the YES button and display “EFB =
(Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)
6.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 var- ies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.
(Read power traverse adjustment)
(Traverse Waveform)
A
VC
B
Specification A = B
7.Press the YES button and save the result of adjustment to the
moment. Then “EFB =
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 var- ies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.
(Write power traverse adjustment)
(Traverse Waveform)
A
VC
B
Specification A = B
9.Press the YES button, and save the adjustment results in the
10.“EFB =
The optical
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