39
MXD-D400
5-11. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments.
(Refer to 5-9. Recording and Displaying Iop Information)
Connection:
Adjusting Procedure:
1. Set the laser power meter on the objective lens of the optical
pick-up.
Connect the digital voltmeter to CN105 pin
1
(I+3V) and
CN105 pin
2
(IOP) on the BD (MD) board.
2. Turn the
l
AMS
L
(MD) knob to display “LDPWR
ADJUS” (C04).
(Laser power : For adjustment)
3. Press the
[YES]
button once to display “L 0.93 mW $
”.
4. Turn the
l
AMS
L
(MD) knob so that the reading of the
laser power meter becomes the specified value. Press the
[YES]
button after setting the range knob of the laser power meter to
10 mW, and save the adjustment results. (“L SAVE $
” will
be displayed for a moment)
Specified Value: 0.85 to 0.91 mW (KMS-262A)
0.90 to 0.95 mW (KMS-262E)
5. Then “L 8.65 mW $
” will be displayed.
6. Turn the
l
AMS
L
(MD) knob so that the reading of the
laser power meter becomes the specified value, press the
[YES]
button to save it.
Specified Value: 8.2 to 8.6 mW (KMS-262A)
8.5 to 8.8 mW (KMS-262E)
Note:
Do not perform the emission with 8.65 mW more than 15 seconds
continuously.
7. Then, turn the
l
AMS
L
(MD) knob to display “LDPWR
CHECK” (C13).
8. Press the
[YES]
button once to display “L 0.93 mW $
”.
Check that the reading of the laser power meter becomes the
specified value.
Specified Value: 0.84 to 0.92 mW (KMS-262A)
0.90 to 0.96 mW (KMS-262E)
5-9.
RECORDING AND DISPLAYING THE IOP
INFORMATION
The Iop data can be recorded in the non-volatile memory. The Iop
value on the optical pick-up label and the Iop value after the ad-
justment will be recorded. Recording these data eliminates the need
to read the label on the optical pick-up.
Recording Procedure:
1. Turn the
l
AMS
L
(MD) knob to display “Iop Write”
(C05), and press the
[YES]
button.
2. The display becomes “Ref=@@@.@” (@ is an arbitrary num-
ber) and the numbers which can be changed will blink.
3. Input the Iop value on the optical pick-up label.
To select the number : Turn the
l
AMS
L
(MD) knob.
To select the digit : Press the
l
AMS
L
(MD) knob
4. When the
[YES]
button is pressed, the display becomes
“Measu=@@@.@” (@ is an arbitrary number).
5. As the adjustment results are recorded for the 4 value. Leave it
as it is and press the
[YES]
button.
6. “Complete!!” will be displayed momentarily. The value will
be recorded in the non-volatile memory and the display will
become “Iop Write” (C05).
Display Procedure:
1. Turn the
l
AMS
L
(MD) knob to display “Iop Read”
(C26), and press the
[YES]
button.
2. “@@.@/##.#” is displayed and the recorded contents are dis-
played.
@@.@ indicates the Iop value on the optical pick-up label.
##.# indicates the Iop value after adjustment
3. To end, press the
l
AMS
L
(MD) button or
[MENU/NO]
button to display “Iop Read” (C26).
Optical pick-up
objective lens
laser
power meter
+
–
BD (MD) board
digital voltmeter
CN105 pin
1
(I +3 V)
CN105 pin
2
(IOP)
5-10. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note:
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to 28 ˚C.
Perform it immediately after the power is turned on when the internal
temperature of the unit is the same as the ambient temperature of 22 ˚C
to 28 ˚C.
3. When D101 has been replaced, perform this adjustment after the tem-
perature of this part has become the ambient temperature.
Adjusting Procedure:
1. Turn the
l
AMS
L
(MD) knob to display “TEMP
ADJUS” (C03).
2. Press the
[YES]
button to select the “TEMP ADJUS” mode.
3. “TEMP =
[OK” and the current temperature data will be
displayed.
4. To save the data, press the
[YES]
button.
When not saving the data, press the
[MENU/NO]
button.
5. When the
[YES]
button is pressed, “TEMP =
SAVE” will
be displayed and turned back to “TEMP ADJUS” (C03) dis-
play then. When the
[MENU/NO]
button is pressed, “TEMP
ADJUS” (C03) will be displayed immediately.
Specified Value:
The “TEMP =
” should be within “E0 - EF”, “F0 - FF”, “00 -
0F”, “10 - 1F” and “20 - 2F”.
