41
HCD-CL5MD
KMS
260B
20101
H0576
Iop = 57.6 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
7. Then, move
.
/
>
and display “LDPWR CHECK” (C13).
8. Press the ENTER/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 ENTER/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 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value ± 10%
(Optical pick-up label)
10. Press the MENU/NO button and display “LDPWR CHECK”
(C13) and stop the laser emission.
(The MENU/NO button is effective at all times to stop the
laser emission.)
11. Move
.
/
>
to display “Iop Write”(C05).
12. Press the ENTER/YES button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the ENTER/
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 : Move
.
/
>
.
To select the digit : Press the REC MODE button.
14. When the ENTER/YES button is pressed, “Complete!” will be
displayed momentarily. The value will be recorded in the non-
volatile memory and the display will become “Iop Write” (C05).
Note 1: After step 4, each time the ENTER/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.
(For details of the method for checking
this value, refer to “6-8. Recording and
Displaying the IOP Information”.)
6-12. TRAVERSE ADJUSTMENT
Connection :
Adjusting Procedure :
1. Connect an oscilloscope to CN105 pin
4
(TE) and CN105 pin
6
(VC) of the BD board.
2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.)
3. Press the
M
button and move the optical pick-up outside the
pit.
4. Move
.
/
>
and display “EF MO ADJUS” (C14).
5. Press the ENTER/YES button and display “EFB =
MO-R”.
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
6. Move
.
/
>
so that the waveform of the oscilloscope be-
comes the specified value.
(When
.
/
>
is moved, the
of “EFB=
” changes and
the waveform changes.) In this adjustment, waveform varies at
intervals of approx. 2%. Adjust the waveform so that the speci-
fied value is satisfied as much as possible.
(Read power traverse adjustment)
(Traverse Waveform)
7. Press the ENTER/YES button and save the result of adjustment
to the non-volatile memory (“EFB =
SAVE” will be displayed
for a moment. Then “EFB =
MO-W” will be displayed).
8. Move
.
/
>
so that the waveform of the oscilloscope be-
comes the specified value.
(When
.
/
>
is moved, the
of “EFB-
MO-W”
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.
(Write power traverse adjustment)
(Traverse Waveform)
9. Press the ENTER/YES button, and save the adjustment results
in the non-volatile memory. (“EFB =
SAVE” will be displayed
for a moment.)
10. “EFB =
MO-P”. will be displayed.
The optical pick-up moves to the pit area automatically and servo
is imposed.
V : 0.5 V/div
H : 10 ms/div
Input : DC mode
Oscilloscope
BD (MD) board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
VC
A
B
Specification A = B
VC
A
B
Specification A = B
R
6-11. 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. Move
.
/
>
to display “Iop NV Save” (C06).
2. Press the ENTER/YES button and display “Iop [stop]”.
3. After the display changes to “Iop =xxsave?”, press the ENTER/
YES button.
4. After “Complete!” is displayed momentarily, the display changes
to “Iop 7.0 mW”.
5. After the display changes to “Iop=yysave?”, press the ENTER/
YES button.
6. When “Complete!” is displayed, it means that Iop NV saving
has been completed.