Sony MDS-JA333ES Service Manual page 32

5-8. Recording and Displaying the IOP Information
The IOP data that is indicated on the pick-up, can be saved in the
non-volatile memory of the MDS-JA333ES. The IOP data that is
printed on the optical pick-up and the IOP data after adjustment is
completed can be saved in the memory. Saving the IOP data in the
memory eliminates the needs to look at the printed value on the
label that is attached on the surface of optical pick-up, and enables
to view the IOP data on display.
Recording procedure:
1. Rotate the lAMSL knob to display "Iop Write" (C05).
Press the YES button.
2. "Ref=@@@.@" (@ is arbitrary number.) appears and the values
that can be changed flash.
3. Input the value of IOP that is written in the optical pick-up.
Selecting figure: Rotate the lAMSL knob.
Selecting digit : Press the lAMSL knob.
4. Press the YES button and "Measu=@@@.@" (@ is arbitrary
number.) appears.
5. The value of step 4 is used to record the adjustment result, so
press the YES button.
6. "Complete!" appears for a moment, and the value is recorded
in the non-volatile memory. Then, "Iop Write" (C05) appears.
Displaying procedure:
1. Rotate the lAMSL knob to display "Iop Read" (C26)
and press the YES button.
2. "@@.@/##.#" appears and the contents that is recorded are
displayed.
@@.@: The value of IOP that is described in pick-up
##.#: The value of IOP after adjustment
3. When the display is completed, press the lAMSL knob
or MENU/NO button to display "Iop Read" (C26).
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5-9. Temperature Compensation Offset
Adjustment
The temperature data at 25°C is used as the reference data and is
saved in the non-volatile memory for offset adjustment.
Note.
1. Do not perform this adjustment normally.
2. Perform this adjustment under the ambient temperature in the
range of 22 to 28 °C. Perform this adjustment immediately after
the main power is turned on in which the internal temperature
of MDS-JA333ES is still the same as the ambient temperature.
3. After replacing the D101, wait the until the temperature of the
parts become the same as the ambient temperature and perform
this adjustment.
Checking procedure:
1. Rotate the lAMSL knob to display "TEMP ADJUS"
(C03).
2. Press the YES button and select the "TEMP ADJUS" (C03) mode.
3. "TEMP= [OK" and the current temperature data appear.
4. When the data is saved: Press the YES button
When the data is not saved: Press the MENU/NO button
5. When the YES button is pressed, "TEMP =
"TEMP ADJUS" (C03) appear.
When the MENU/NO button is pressed, the display is changed
to "TEMP ADJUS" (C03) immediately.
Specified value:
The value of TEMP = is within E0 to EF, F0 to FF, 00 to 0F, 10
to 1F, and 20 to 2F.
5-10. Laser Power Adjustment
Before adjustment:
Confirm the IOP value of optical pick-up. (Refer to Section 5-8
"Recording and displaying the IOP information".)
Connection:
Optical pick-up
objective lens
BD board
CN110 5-pin (I+3V)
CN110 4-pin (IOP)
Adjustment procedure:
1. Insert the laser power meter from the disc inlet and set it 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 CN110 5-pin (I+3V) and the
CN110 4-pin (IOP).
SAVE" and
Laser power meter
Digital voltmeter