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HCD-PX333
6. Press the . “R” or > “R” button so that the reading
of the laser power meter becomes the specified value, press the
ENTER/YES “R” button to save it.
Note: Do not perform the emission with 8.4 mW more than 15 seconds
continuously.
7. Then, press the . “R” or > “R” button to display
“LDPWR CHECK” (C13).
8. Press the ENTER/YES “R” button once to display “LD 0.9mW$
”. Check that the reading of the laser power meter matches
with the specified value as described in the following table.
9. Press the ENTER/YES “R” button once more to display “LD
8.4mW$ ”. 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 :
Digital voltmeter reading :
Value on the optical pick-up label ±10%
10. Press the MENU/NO “R” button to display “LDPWR CHECK”
(C13) and stop the laser emission.
(The MENU/NO “R” button is effective at all times to stop the
laser emission)
11. Press the . “R” or > “R” button to display “Iop Write”
(C05).
12. Press the ENTER/YES “R” button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the ENTER/
YES “R” 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 : Press the . “R” or > “R button.
To select the digit :Press the [CD SYNC NORMAL] button
so that “IT” is displayed.
Then press the[REC MODE] button.
14.
When the ENTER/YES “R” 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: After step 4, each time the ENTER/YES “R” button is pressed, the
display will be switched to “LD 0.7mW$ ”, “LD 7.5mW$ ”
and “LD WP ” Nothing needs to be performed here.
12. TRAVERSE ADJUSTMENT
Connection:
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” button to move the optical pick-up outside
the pit.
4. Press the . “R” or > “R” button to display “EF MO
ADJUST” (C07).
5.
Press the ENTER/YES “R” button to display “EFB = MO-R”.
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
6. Press the . “R” or > “R” button so that the waveform of
the oscilloscope becomes the specified value.
(When the . “R” or > “R” button is pressed, the of
“EFB= ” changes and the waveform changes) In 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
7. Press the ENTER/YES “R” 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).
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.
KMS262A
20101
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
(Optical pick-up label)
For details of the method for
checking this value, refer to
“8. Recording and Displaying
the Iop Information”
+
–
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/div
BD (MD) board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
A
B
VC
Specification A = B
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 . “R” or > “R” button to display “Iop NV Save” (C06).
2. Press the ENTER/YES “R” button and display “Iop [stop]”.
3. After the display changes to “Iop =xxsave?”, press the ENTER/
YES “R” button.
4. After “Complete!” is displayed momentarily, the display changes
to “Iop 8.4 mW”.
5. After the display changes to “Iop=yysave?”, press the ENTER/
YES “R” button.
6. When “Complete!” is displayed, it means that Iop NV saving
has been completed.
+
–
oscilloscope
(DC range)
10 pF
330 k
Ω
CN105 pin
4
(TE)
CN105 pin
6
(VC)
BD (MD) board
The method of identifying the optical pick-up (KMS-262A/262E)
UV adhesive agent
Optical pick-up
(KMS-262A/262E
)
Pink : KMS-262A
White : KMS-262E
UV adhesive agent =
SPECIFIED VALUE
KMS-262A
KMS-262E
8.2 to 8.6 mW
8.5 to 8.8 mW
SPECIFIED VALUE
KMS-262A
KMS-262E
0.84 to 0.92 mW
0.90 to 0.96 mW
SPECIFIED VALUE
KMS-262A
KMS-262E
8.4 ± 0.3 mW
8.65 ± 0.25 mW