– 26 –
7. Then, turn 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.
Specification:
Laser power meter reading : 7.0 ± 0.2 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. Turn 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 : Turn 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.
KMS260A
27X40
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
(Optical pick-up label)
11. TRAVERSE ADJUSTMENT
Connection :
Adjusting Procedure :
1. Connect an oscilloscope to CN110 pin
3
(TEO) 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 pick-up outside
the pit.
4. Turn the
=
AMS
+
knob and display “EF MO ADJUST”
(C10).
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. Turn the
=
AMS
+
knob so that the waveform of the
oscilloscope becomes the specified value.
(When the
=
AMS
+
knob is turned, 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)
V: 0.1 V/div
H: 10 ms/div
BD board
CN110 pin
3
(TEO)
CN110 pin
1
(VC)
[ ]
+
–
oscilloscope
(DC range)
10 pF
330 k
Ω
CN110 pin
3
(TEO)
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.
A
B
VC
Specification A = B
