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6. Press the
. m "R"
reading of the laser power meter becomes 6.9 to 7.1 mW, press
the
ENTER/YES "R"
button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
7. Then, press the
. m "R"
display "LDPWR CHECK" (C13).
8. Press the
ENTER/YES "R"
0.9mW$
". Check that the reading of the laser power meter
become 0.85 to 0.91 mW.
9. Press the
ENTER/YES "R"
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 ± 0.2 mW
Digital voltmeter reading : Value on the optical pick-up label
±10%
(Optical pick-up label)
KMS262A
20101
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (Ω)
10. Press the
button to display "LDPWR CHECK"
MENU/NO "R"
(C13) and stop the laser emission.
(The
button is effective at all times to stop the
MENU/NO "R"
laser emission)
11. Press the
. m "R"
or
Write" (C05).
12. Press the
ENTER/YES "R"
Ref=@@@.@ (@ is an arbitrary number), press the
button to display "Measu=@@@.@" (@ is an
YES "R"
arbitrary number).
13. The numbers which can be changed will blink. Input the Iop
value noted down at step 9.
To select the number : Press the
button.
To select the digit : Press the
14. When the
ENTER/YES "R"
be displayed momentarily. The value will be recorded in the
non-volatile memory and the display will become "Iop Write"
(C05).
Note: After step 4, each time the
display will be switched "LD 0.7mW$
and "LD Wp
$
". Nothing needs to be performed here.
Adjustment Location: BD (MD) board (see page 47)
11. 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:
1. Press the
or
. m "R"
NV Save" (C06).
2. Press the
ENTER/YES "R"
3. After the display changes to "Iop =xxsave?", press the
44
or
M > "R"
button so that the
or
button to
M > "R"
button once to display "LD
button once more to display "LD
For details of the method for
checking this value, refer to
"8. Recording and Displaying
the Iop Information"
M > "R"
button to display "Iop
button. When the display becomes
ENTER/
or
. m "R"
M > "R"
[REC MODE]
button.
button is pressed, "Complete!" will
ENTER/YES "R"
button is pressed, the
", "LD 7.5mW$
button to display "Iop
M > "R"
button and display "Iop [stop]".
ENTER/
button.
YES "R"
4. After "Complete!" is displayed momentarily, the display changes
to "Iop 7.0 mW".
5. After the display changes to "Iop=yysave?", press the
button.
YES "R"
6. When "Complete!" is displayed, it means that Iop NV saving
has been completed.
12. 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 (MD) board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
Connection:
BD (MD) 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 (MD) board.
2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the
M "R"
the pit.
4. Press the
. m "R"
MO ADJUST" (C07).
5. Press the
ENTER/YES "R"
R".
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Press the
. m "R"
waveform of the oscilloscope becomes the specified value.
(When the
. m "R"
the
of "EFB=
this adjustment, waveform 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
7. Press the
ENTER/YES "R"
justment to the non-volatile memory ("EFB =
be displayed for a moment. Then "EFB =
displayed).
oscilloscope
(DC range)
330 k Ω
+
–
10 pF
oscilloscope
(DC range)
+
V: 0.1 V/div
–
H: 10 ms/div
button to move the optical pick-up outside
or
button to display "EF
M > "R"
button to display "EFB =
or
M > "R"
button so that the
or
button is pressed,
M > "R"
" changes and the waveform changes) In
A
B
button and save the result of ad-
MO-W" will be
ENTER/
MO-
SAVE" will
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