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5-5. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the temperature data at that time in the non-volatile memory
as 25°C reference data.
Notes:
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 temperature of this part has become the ambient tempera-
ture.
Adjusting Method:
1. Press the = 0 button or ) + button and display
"TEMP ADJUST".
2. Press the YES button and select the "TEMP ADJUST" mode.
3. "TEMP =
" and the current temperature a data will be dis-
played.
4. To save the data, press the YES button.
When not saving the data, press the EDIT/NO button.
5. When the YES button is pressed, "TEMP=
be displayed for some time, followed by "TEMP ADJUST".
When the EDIT/NO button is pressed, "TEMP ADJUST"
will be displayed immediately.
Specifications:
The temperature should be within "E0-EF", "F0-FF", "00-0F",
"10-1F" and "20-2F".
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5-6. LASER POWER ADJUSTMENT
Connection:
Optical pick-up
objective lens
BD board
CN110 pin 5 (I+3V)
CN110 pin 4 (IOP)
Adjusting Method:
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press
the CHARACER button or SCROLL button and move the
optical pick-up.)
Connect the digital voltmeter to CN110 pin 5 (I+3V) and
CN110 pin 4 (IOP) of the BD board.
2. Press the = 0 button or ) + button and display
"LDPWR ADJUST".
(Laser power: for adjustment)
3. Press the YES button and display "LD 0.9 mW $
4. Press the = 0 button or ) + button so that the
reading of the laser power meter becomes 0.82 to 0.91 mW.
Set the range control on the laser power meter to 10 mW, then
Q Q
press the YES button to save the adjustment result in the non-
3
6 7
1 3
1 5
volatile memory.
("LD SAVE $
" will be displayed for a moment.)
5. Then "LD 7.0 mW $
"will be displayed.
6. Press the = 0 button or ) + button so that the
reading of the laser power meter becomes 6.9 to 7.1 mW, press
the YES button and save the adjustment result in the non-
volatile memory.
("LD SAVE $
" will be displayed for a moment.)
Note: Do not perform the emission with 7.0 mW more than 15
seconds continuously.
7. Press the = 0 button or ) + button and display
"LDPWR CHECK".
8. Press the YES button and display "LD 0.9 mW $
Check that the reading of the laser power meter becomes 0.80
to 0.96 mW.
9. Press the YES button and display "LD 7.0 mW $
Check that the reading of the laser power meter and digital
voltmeter satisfy the specified value.
Specification:
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value ±10%
(Optical pick-up label)
KMS260A
27X40
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
co
10. Press the EDIT/NO button and display "LDPWR CHECK",
and stop the laser emission.
.
(The EDIT/NO button is effective at all times to stop the
laser emission.)
9 4
2 8
laser
power meter
digital voltmeter
+
–
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0 5
8
2 9
9 4
2 8
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