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[
AMS
]
6. Turn the
knob so that the reading of the laser
.
>
power meter becomes 6.9 to 7.1 mW, press the
to save it. ("LD SAVE $
Note: Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
[
AMS
7. Then, turn the
.
CHECK" (C13).
[YES]
8. Press the
button once to display "LD 0.9mW$
Check that the reading of the laser power meter become 0.85
to 0.91 mW (KMS-260B) or 0.90 to 0.96 mW (KMS-260E).
[YES]
9. Press the
button once more to display "LD 7.0mW$
". Check that the reading the laser power meter and digital
voltmeter satisfy the specified value.
Note down the digital voltmeter reading value.
Specified Value:
Laser power meter reading : 7.0 ± 0.1 mW (KMS-260B)
7.25 ± 0.05 mW (KMS-260E)
Digital voltmeter reading : Value on the optical pick-up label
±10%
(Optical pick-up label)
For details of the method for
KMS260B or E
checking this value, refer to
20101
"5-9. Recording and Displaying
B0825
the IOP Information"
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
[MENU/NO]
10. Press the
button to display "LDPWR CHECK"
(C13) and stop the laser emission.
[MENU/NO]
(The
button is effective at all times to stop the
laser emission)
[
AMS
]
11. Turn the
.
>
knob to display "Iop Write" (C05).
[YES]
12. Press the
button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the
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 : Turn the
To select the digit : Press the
[YES]
14. When the
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"
(C05).
Note: After step 9, each time the
will be switched "LD 0.7mW$
WP
$
". Nothing needs to be performed here.
Adjustment Location: BD board (see page 30)
5-12. Iop NV SAVE
Write the reference values in the nonvolatile memory to perform
"Iop compare". As this involves rewriting the reference values, do
not perform this procedure except when adjusting the laser power
during replacement of the optical pick-up and when replacing the
IC102. Otherwise the optical pick-up check may deteriorate.
Note: Perform this function with the optical pick-up set at room
temperature.
Procedure:
[
AMS
]
1. Turn the
.
>
knob to display "Iop NV Save" (C06).
[YES]
2. Press the
button and display "Iop [stop]".
3. After the display changes to "Iop =xxsave?", press the
button.
[YES]
button
" will be displayed for a moment)
]
>
knob to display "LDPWR
[YES]
[
AMS
]
.
>
knob.
[
AMS
]
.
>
knob.
[YES]
button is pressed, the display
", "LD 6.2mW$
", and "LD
[YES]
4. After "Complete!" is displayed momentarily, the display changes
to "Iop 7.0mW".
5. After the display changes to "Iop=yysave?", press the
button.
6. When "Complete!" is displayed, it means that Iop NV saving
has been completed.
".
5-13. TRAVERSE ADJUSTMENT
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.
BD board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
Connection:
BD board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
Procedure:
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105
pin 6 (VC) on the BD board.
2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the
M
button to move the optical pick-up outside the
pit.
[
AMS
4. Turn the
.
(C07).
[YES]
5. Press the
button to display "EFB =
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
[
AMS
6. Turn the
.
oscilloscope becomes the specified value.
[
AMS
(When the
.
changes and the waveform changes) In this adjustment, wave-
form varies 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
VC
Specification A = B
[YES]
7. Press the
button and save the result of adjustment to the
non-volatile memory ("EFB =
a moment. Then "EFB =
MDS-S9
oscilloscope
(DC range)
330 k Ω
+
–
10 pF
oscilloscope
(DC range)
+
V: 0.1 V/div
–
H: 10 ms/div
]
>
knob to display "EF MO ADJUST"
MO-R".
]
knob so that the waveform of the
>
]
knob is turned, the
of "EFB=
>
A
B
SAVE" will be displayed for
MO-W" will be displayed).
[YES]
"
27
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