Sony HCD-CP33 Service Manual page 28

6-7. 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
temperature 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 "6-4. Precautions on
Adjustments" and execute the initial setting before the adjustment
as required.
Setting Procedure :
1. Rotate the AMS dial to display "ADJ CLEAR".
2. Press the ENTER/YES button. "Complete!" will be displayed
momentarily and initial setting will be executed, after which
"ADJ CLEAR" will be displayed.
6-8. Recording and Displaying the IOP
Information
The IOP data can be recorded in the non-volatile memory. The IOP
value on the label of the optical pickup 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. With the power ON, press the MD x button while pressing the
CD x and MD REC z buttons together.
2. Rotate the AMS dial to display "Service", and press ENTER/
YES button.
3. Rotate the AMS dial to display "Iop.Write", and press the
ENTER/YES button.
4. The display becomes Ref=@@@.@ (@ is an arbitrary number)
and the numbers which can be changed will blink.
5. Input the IOP value written on the optical pick-up.
To select the number : Rotate the dial.
To select the digit : Press the MD WALKMAN SYNC button.
6. When the ENTER/YES button is pressed, the display becomes
"Measu=@@@.@" (@ is an arbitrary number).
7. As the adjustment results are recorded for the 6 value. Leave it
as it is and press the ENTER/YES button.
8. "Complete!" will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will become
"Iop Write".
Display Procedure :
1. Rotate the AMS dial to display "Iop.Read".
2. "@@.@/##.#" is displayed and the recorded contents are
displayed.
@@.@ indicates the Iop value labeled on the pick-up.
##.# indicates the Iop value after adjustment
3. To end, press the MENU/NO button to display "Iop Read".
28
6-9. 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 temperature of this part has become the ambient temperature.
Adjusting Procedure :
1. Rotate the AMS dial and display "TEMP ADJUST".
2. Press the ENTER/YES button and select the "TEMP ADJUST"
mode.
3. "TEMP = OK" and the current temperature data will be
displayed.
4. To save the data, press the ENTER/YES button.
When not saving the data, press the MENU/NO button.
5. When the ENTER/YES button is pressed, "TEMP =
will be displayed and turned back to "TEMP ADJUST" display
then. When the MENU/NO button is pressed, "TEMP
ADJUST" will be displayed immediatelly.
Specified Value :
The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 -
0F", "10 - 1F" and "20 - 2F".
6-10. LASER POWER ADJUSTMENT
Check the IOP value of the optical pick-up before adjustments.
(Refer to 7-8. Recording and Displaying IOP Information.)
Connection :
Adjusting Procedure :
Optical pick-up
objective lens
BD board
CN110 pin 5 (I+3V)
CN110 pin 4 (IOP)
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the x button
and display the "MD", and then press the m button or M
button to move the optical pick-up.)
Connect the digital volt meter to CN110 pin 5 (I+3V) and
CN110 pin 4 (IOP).
2. Rotate the AMS dial and display "LDPWR ADJUST".
(Laser power : For adjustment)
3. Press the ENTER/YES button once and display "LD 0.9 mW
$ ".
4. Rotate the AMS dial so that the reading of the laser power
meter becomes 0.85 to 0.91 mW. Press the ENTER/YES button
after setting the range knob of the laser power meter, and save
the adjustment results. ("LD SAVE $
a moment.)
5. Then "LD 7.0 mW $ " will be displayed.
SAVE"
Laser power
meter
Digital volt meter
" will be displayed for