– 24 –
7. 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 JOG dial to display “TEMP ADJUST”.
2. Press the
[YES, ENTER]
button to select the “TEMP ADJUST”
mode.
3. “TEMP =
” and the current temperature data will be dis-
played.
4. To save the data, press the
[YES, ENTER]
button.
When not saving the data, press the
[NO, CANCEL]
button.
5. When the
[YES, ENTER]
button is pressed, “TEMP =
SAVE”
will be displayed and turned back to “TEMP ADJUST” dis-
play then. When the
[NO, CANCEL]
button is pressed, “TEMP
ADJUST” will be displayed immediately.
Specified Value :
The “TEMP =
” should be within “E0 - EF”, “F0 - FF”, “00 -
0F”, “10 - 1F” and “20 - 2F”.
8. LASER POWER ADJUSTMENT
Connection :
Adjusting Procedure :
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the
m
button
or
M
button to move the optical pick-up)
Connect the digital voltmeter to CN110 pin
5
(I+3V) and
CN110 pin
4
(IOP) on the BD board.
2. Turn the JOG dial to display “LDPWR ADJUST”.
(Laser power : For adjustment)
3. Press the
[YES, ENTER]
button once to display “LD 0.9 mW
$
”.
4. Turn the JOG dial so that the reading of the laser power meter
becomes 0.85 to 0.91 mW. Press the
[YES, ENTER]
button
after setting the range knob of the laser power meter, and save
the adjustment results. (“LD SAVE $
” will be displayed for
a moment)
5. Then “LD 7.0 mW $
” will be displayed.
6. Turn the JOG dial so that the reading of the laser power meter
becomes 6.9 to 7.1 mW, press the
[YES, ENTER]
button to
save it.
Note:
Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
7. Then, turn the JOG dial to display “LDPWR CHECK”.
8. Press the
[YES, ENTER]
button once to display “LD 0.9 mW
$
”. Check that the reading of the laser power meter become
0.85 to 0.91 mW.
9. Press the
[YES, ENTER]
button once more to display “LD 7.0
mW $
”. 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%
10. Press the
[NO, CANCEL]
button to display “LDPWR CHECK”
and stop the laser emission.
(The
[NO, CANCEL]
button is effective at all times to stop the
laser emission)
Note 1:
After step 9, each time the
[YES, ENTER]
button is pressed, the
display will be switched “LD 0.7 mW $
”, “LD 6.2 mW $
”,
and “LD WP
$
”. Nothing needs to be performed
here.
Optical pick-up
objective lens
laser
power meter
+
–
BD board
digital voltmeter
CN110 pin
5
(I +3V)
CN110 pin
4
(IOP)
[ ]
KMS260A
27X40
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
(Optical pick-up label)
[ ]
Содержание PMC-MD55 - Md Boombox
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