Temperature Compensation Offset Adjustment Laser Power Adjustment
Save the temperature data at that time in the non-volatile memoryConnection :
as 25 uC reference data.Laser power
Note :meter
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 uC to
28 uC. Perform it immediately after the power is turned on
when the internal temperature of the unit is the same as the
Optical pick-up
ambient temperature.objective lens
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambientDigital voltmeter
temperature.
Adjusting Method :
1. Press the , buttons and display OTEMPnN ADJUST�.BD board
2. Press the n button and select the OTEMP ADJUST� mode.TP (I + 5V)
TP (IOP)
3. OTEMP = � and the current temperature data will be
displayed.
4. To save the data, press the n button.Adjusting Method :
When not saving the data, press the N button.1. Set the laser power meter on the objective lens of the optical
5. When the n button is pressed, OTEMP SAVE� will be = pick-up. (When it cannot be set properly, press the ALBUM
displayed for some time, followed by OTEMP ADJUST�.button or PHOTO button and move the optical pick-up.)
When the N button is pressed, OTEMP ADJUST� will beConnect the digital volt meter to TP (IOP) and TP (I+5V).
displayed.2. Press the , buttons and display OLDPWR ADJUST�.nN
(Laser power : For adjustment)
Specifications :3. Press the n button twice and display OLD $ 4B = 3.5 mW�.
4. Adjust RV102 of the BD board so that the reading of the laser
The OTEMP = � should be within OE0 - EF�, OF0 - FF�, O00 -
+0.1
power meter becomes 3.450F�, O10 - 1F� and O20 - 2F�.� 0mW.
5. Press the n button and display OLD $ 96 = 7.0 mW�.
(Laser power : MO writing)
6. Check that the laser power meter and digital voltmeter readings
satisfy the specified value.
Specification :
Laser power meter reading : 7.0 ? 0.3 mW
Digital voltmeter reading : Optical pick-up displayed value ? 10%
(Optical pick-up label)
KMS210A
27X40
B0825
lop = 82.5 mA in this case
lop (mA) = Digital voltmeter reading (mV)/ 1 (W)
7. Press the n button and display OLD $ 0F = 0.7 mW�.
(Laser power : MO reading)
8. Check that the laser power meter at this time satisfies the
specified value.
Specification :
Laser power meter reading : 0.70 ? 0.1 mW
9. Press the N button and display OLDPWR ADJUST�, and stop
laser emission.
(The N button is effective at all times to stop the laser
emission.)
N 19 N |
ACEC
