Sony HCD-MD5, Руководство по обслуживанию, Страница: 21 / 101

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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.
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.
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient tempera-
ture.
Adjusting Method:
1. Turning the MULTI JOG dial and display “TEMP ADJUST”.
2. Press the ENTER/YES key 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 ENTER/YES key.
When not saving the data, press the EDIT/NO key.
5. When the ENTER/YES key is pressed, “TEMP= SAVE”
will be displayed for some time, followed by “TEMP ADJUST”.
When the EDIT/NO key is pressed, “TEMP ADJUST” will be
displayed.
Specifications:
The temperature should be within “E0-EF”, “F0-FF”, “00-0F”,
“10-1F” and “20-2F”.
5-6. LASER POWER ADJUSTMENT
Connection:
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 0 key or
)
key and move the optical pick-up.)
Connect the digital voltmeter to TP (IOP) and TP (I+5V).
2. Turning the MULTI JOG dial and display “LDPWR ADJUST”.
(Laser power: For adjustment)
3. Press the ENTER/YES key twice and display “LD $ 4B
=3.5mW”.
4. Adjust RV102 of the BD (MD) board so that the reading of the
laser power meter becomes 3.4 mW.
5. Press the ENTER/YES key and display “LD $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%
7. Press the ENTER/YES key and display “LD $ 0F=0.7 mW”.
(Laser power: MO reading)
8. Check that the laser power meter at this time satisfied the speci-
fied value.
Specification:
Laser power meter reading: 0.70 ± 0.1 mW
9. Press the EDIT/NO key and display “LDPWR ADJUST”, and
stop laser emission.
(The EDIT/NO key is effective at all times to stop the laser
emission.)
KMS210A
27X40
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
(Optical pick-up label)
Optical pick-up
objective lens
laser
power meter
+
–
BD (MD) board
TP (I+5V)
TP (IOP)
digital voltmeter
+0.1
–0