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MDS-S50
5-7. INITIAL SETTING OF ADJUSTMENT VALUE
Note:
Mode which sets the adjustment results recorded in the non-volatile
memory to the initial setting value. However the results of the tempera-
ture compensation offset adjustment will not change to the initial setting
value.
If initial setting is performed, perform all adjustments again excluding the
temperature compensation offset adjustment.
For details of the initial setting, refer to “5-4. Precautions for Adjustments”
(See page 24) and execute the initial setting before the adjustment as
required.
Procedure:
1. Turn the [ AMS ] knob to display “ADJ CLEAR” (C28).
2. Press the [YES] button. “Complete!” will be displayed mo-
mentarily and initial setting will be executed, after which “ADJ
CLEAR” (C28) will be displayed.
5-8. RECORDING AND DISPLAYING THE IOP
INFORMATION
The IOP data can be recorded in the non-volatile memory. The
IOP value on the optical pick-up label and the IOP value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
Recording Procedure:
1. Turn the [ AMS ] knob to display “Iop Write” (C05),
and press the [YES] button.
2. The display becomes “Ref=@@@.@” (@ is an arbitrary num-
ber) and the numbers which can be changed will blink.
3. Input the IOP value on the optical pick-up label.
To select the number : Turn the [ AMS ] knob.
To select the digit : Press the
[ AMS ] button.
4. When the [YES] button is pressed, the display becomes
“Measu=@@@.@” (@ is an arbitrary number).
5. As the adjustment results are recorded for the step 4 value.
Leave it as it is and press the [YES] button.
6. “Complete!!” will be displayed momentarily. The value will
be recorded in the non-volatile memory and the display will
become “Iop Write” (C05).
Display Procedure:
1. Turn the [ AMS ] knob to display “Iop Read”(C26).
2. “@@.@/##.#” is displayed and the recorded contents are dis-
played.
@@.@ indicates the IOP value on the optical pick-up label.
##.# indicates the IOP value after adjustment
3. To end, press the [ AMS ] knob and [MENU/NO]
button to display “Iop Read” (C26).
5-9. 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 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.
Procedure:
1. Turn the [ AMS ] knob to display “TEMP ADJUST”
(C03).
2. Press the [YES] button to select the “TEMP ADJUST” mode.
3. “TEMP = [OK]” and the current temperature data will be
displayed.
4. To save the data, press the [YES] button.
When not saving the data, press the [MENU/NO] button.
5. When the [YES] button is pressed, “TEMP = SAVE” will
be displayed and turned back to “TEMP ADJUST” (C03)
display then. When the [MENU/NO] button is pressed, “TEMP
ADJUST” (C03) will be displayed immediately.
Specified Value:
The “TEMP = ” should be within “E0 - EF”, “F0 - FF”, “00 -
0F”, “10 - 1F” and “20 - 2F”.
5-10. LASER POWER ADJUSTMENT
Check the IOP value of the optical pick-up before adjustments.
(Refer to 5-8. Recording and Displaying the IOP Information)
Connection:
Procedure:
1. Set the laser power meter on the objective lens of the
optical pick-up. (When it cannot be set properly, press
the
m button and M button to move the optical pick-
up)
Connect the digital voltmeter to CN105 pin 1 (I+3V) and
CN105pin 2 (IOP) on the BD board.
2. Turn the [ AMS ] knob to display “LDPWR ADJUST”
(C04).
(Laser power : For adjustment)
3. Press the [YES] button once to display “LD 0.9 mW $ ”.
4. Turn the [ AMS ] knob so that the reading of the laser
power meter becomes 0.85 to 0.91 mW. Press the [YES] button
after setting the range knob of the laser power meter becomes
10 mW, and save the adjustment results. (“LD SAVE $ ” will
be displayed for a moment)
5. Then “LD 7.0 mW $ ” will be displayed.
Optical pick-up
objective lens
laser
power meter
+
–
BD board
digital voltmeter
CN105 pin
1
(I+3V)
CN105 pin
2
(IOP)
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