Temperature Compensation Offset Adjustment; Laser Power Adjustment - Sony HCD-MD515 - Component For Dhcmd515 Service Manual

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:
1. Turn the MULTI JOG dial and display "TEMP ADJUST".
2. Press the ENTER/YES button and select the "TEMP AD-
JUST" mode.
3. "TEMP = " and the current temperature a data will be dis-
played.
4. To save the data, press the ENTER/YES button.
When not saving the data, press the EDIT/NO button.
5. When the ENTER/YES button is pressed, "TEMP=
SAVE" will 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".

6. LASER POWER ADJUSTMENT

Connection:
Optical pick-up
objective lens
BD (MD) 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 CN110 pin 5 (I+3 V) and
CN110 pin 4 (IOP) of the BD (MD) board.
2. Turn the MULTI JOG dial and display "LDPWR ADJUST".
(Laser power: for adjustment)
3. Press the ENTER/YES button and display "LD 0.9 mW $
4. Turn the MULTI JOG dial so that the reading 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
press the ENTER/YES button to save the adjustment result
in the non- volatile memory.
("LD SAVE $ " will be displayed for a moment.)
5. Then "LD 7.0 mW $
6. Turn the MULTI JOG dial so that the reading 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 $ " will be displayed for a moment.)
Note: Do not perform the emission with 7.0 mW more than 15
seconds continuously.
7. Turn the MULTI JOG dial and display "LDPWR CHECK".
8. Press the ENTER/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 ENTER/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
B0567
lOP=56.7 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( )
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.)
– 25 –
laser
power meter
digital voltmeter
+
–
"will be displayed.
".
".
".