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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 tem-
perature of this part has become the ambient temperature.
Adjusting Method:
[
SELECTOR
=
1. Turn the
ADJUST".
[ENTER/YES]
2. Press the
JUST" mode.
3. "TEMP =
" and the current temperature a data will be dis-
played.
4. To save the data, press the
When not saving the data, press the
[ENTER/YES]
5. When the
SAVE" will be displayed for some time, followed by "TEMP
ADJUST".
[MENU/NO]
When the
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".
]
+
dial and display "TEMP
button and select the "TEMP AD-
[ENTER/YES]
button.
[MENU/NO]
button.
button is pressed, "TEMP =
6.
LASER POWER ADJUSTMENT
Preparation:
Referring to "3. Disassembly", remove the Base Unit from MD
Mechanism Deck.
Connection:
Optical pick-up
objective lens
BD board
TP29 (IOP +)
TP30 (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 ) button
or 0 button and move the optical pick-up.)
Connect the digital voltmeter to TP29 (IOP+) and TP30
(IOP–) of the BD board.
[
SELECTOR
=
2. Turn the
ADJUST".
(Laser power: for adjustment)
[ENTER/YES]
3. Press the
".
[
SELECTOR
=
4. Turn the
of the laser power meter becomes 0.82 to 0.93 mW.
Set the range control on the laser power meter to 10 mW, then
[ENTER/YES]
press the
in the non- volatile memory.
("LD SAVE $
5. Then "LD 7.0 mW $
[
SELECTOR
=
6. Turn the
of the laser power meter becomes 6.9 to 7.1 mW, press the
[ENTER/YES]
button and save the adjustment result in the
nonvolatile memory.
("LD SAVE $
Note: Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
[
SELECTOR
=
7. Turn the
CHECK".
[ENTER/YES]
8. Press the
". Check that the reading of the laser power meter becomes
0.80 to 0.96 mW.
[ENTER/YES]
9. Press the
". Check that the reading of the laser power meter and digi-
tal voltmeter satisfy the specified value.
Specification:
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value
(Optical pick-up label)
KMS260A
27X40
B0567
lOP=56.7 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
[MENU/NO]
10. Press the
and stop the laser emission.
[MENU/NO]
(The
laser emission.)
– 15 –
laser
power meter
digital voltmeter
+
–
]
+
dial and display "LDPWR
button and display "LD 0.9 mW $
]
+
dial so that the reading
button to save the adjustment result
" will be displayed for a moment.)
"will be displayed.
]
+
dial so that the reading
" will be displayed for a moment.)
]
+
dial and display "LDPWR
button and display "LD 0.9 mW $
button and display "LD 7.0 mW $
±10%
button and display "LDPWR CHECK",
button is effective at all times to stop the
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