– 31 –
7. Then, rotate the
[ AMS ]
knob and display “LDPWR
CHECK” (C02).
8. Press the
[YES]
button once and display “LD 0.9 mW $
”.
Check that the reading of the laser power meter become 0.85
to 0.91 mW.
9. Press the
[YES]
button once more and display “LD 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 pick-up displayed value
±10%
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”(C28).
12. Press the
[YES]
button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the
[YES]
button to display “Measu=@@@.@” (@ is an arbitrary num-
ber).
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 dis-
played momentarily. The value will be recorded in the non-
volatile memory and the display will become “Iop Write”.
Note 1:
After step 4, each time the
[YES]
button is pressed, the display
will be switched between “LD 0.7 mW $
”, “LD 6.2 mW $
”, and “LD Wp $
”. Nothing needs to be performed
here.
±
≠
±
≠
±
≠
±
≠
5-11. TRAVERSE ADJUSTMENT
Connection :
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.)
A disc is loaded automatically, if pushing the tray.
3. Press the
)
button and move the optical pick-up outside
the pit.
4. Rotate the
[ AMS ]
knob and display “EF MO ADJUS”
(C11).
5. Press the
[YES]
button and display “EFB =
MO-R”.
(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 varies at intervals of approx. 2%. Adjust the wave-
form so that the specified value is satisfied as much as pos-
sible.
(Read power traverse adjustment)
(Traverse Waveform)
7. Press the
[YES]
button and save the result of adjustment to
the non-volatile memory (“EFB =
SAV” will be displayed
for a moment. Then “EFB =
MO-W” will be displayed).
[ ]
±
≠
±
≠
±
≠
+
–
oscilloscope
(DC range)
10 pF
330 k
Ω
CN110 pin
3
(TE)
CN110 pin
1
(VC)
BD board
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.
(For details of the method for checking
this value, refer to “5-8. Recording and
Displaying the IOP information”.)
KMS260A
27X40
B0825
lOP = 82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
(Optical pick-up label)
+
–
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/div
BD board
CN110 pin
3
(TE)
CN110 pin
1
(VC)
A
B
VC
Specification A = B
