Sony HCD-VZ50MD Service Manual page 44

6-7. INITIAL SETTING OF ADJUSTMENT VALUE
Note:
Mode which sets the adjustment results recorded in the non-vola-
tile 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 ex-
cluding the temperature compensation offset adjustment.
For details of the initial setting, refer to "6-4. Precautions for Ad-
justments" and execute the initial setting before the adjustment as
required.
Setting Procedure :
1. Move the multi-stick to display "ADJ CLEAR" (C28).
2. Press the PUSH ENTER button. "Complete!" will be displayed
momentarily and initial setting will be executed, after which "ADJ
CLEAR" (C28) 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 pick-up 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. Move the multi-stick to display "Iop Write" (C05), and press the
PUSH ENTER button.
2. The display becomes Ref=@@@.@ (@ is an arbitrary number)
and the numbers which can be changed will blink.
3. Input the Iop value written on the optical pick-up.
To select the number : Move the multi-stick.
To select the digit : Press the MD REC MODE button while
REC IT is lit.
4. When the PUSH ENTER button is pressed, the display be-
comes "Measu=@@@.@" (@ is an arbitrary number).
5. As the adjustment results are recorded for the 6 value. Leave it
as it is and press the PUSH ENTER button.
6. "Complete!" will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will be-
come "Iop Write" (C05).
Display Procedure :
1. Move the multi-stick to display "Iop Read"(C26).
2. Press the PUSH ENTER button.
2. "@@.@/##.#" is displayed and the recorded contents are dis-
played.
@@.@ indicates the Iop value labeled on the pick-up.
##.# indicates the Iop value after adjustment
3. To end, press the CLEAR button while REC IT is lit, or press
the MD REC MODE button while REC IT is lit and display
"Iop Read" (C26).
6-9. TEMPERATURE COMPENSATION OFFSET
ADJUTMENT
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 tempera-
ture.
44
Adjusting Procedure :
1. Move the multi-stick and display "TEMP ADJUS" (C03).
2. Press the PUSH ENTER button and select the "TEMP ADJUS"
(C03) mode.
3. "TEMP = [OK]" and the current temperature data will be
displayed.
4. To save the data, press the PUSH ENTER button.
When not saving the data, press the CLEAR button while REC
IT is lit.
5. When the PUSH ENTER button is pressed, "TEMP =
will be displayed and turned back to "TEMP ADJUS" (C03)
display then. Pressing the CLEAR button while REC IT is lit
displays "TEMP ADJUS" (C03) immediately.
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 6-8. Recording and Displaying the Iop Information.)
Optical pick-up
objective lens
BD (MD) board
CN105 pin 1 (I+3V)
CN105 pin 2 (IOP)
Connection :
Adjusting 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 or M
button while REC IT is off and move the optical pick-up.)
Connect the digital volt meter to CN105 pin 1 (I+3V) and
CN105 pin 2 (IOP).
2. Move the multi-stick and display "LDPWR ADJUS" (C04).
(Laser power : For adjustment)
3. Press the PUSH ENTER button once and display "LD 0.9 mW
$ ".
4. Move the multi-stick so that the reading of the laser power meter
becomes 0.85 to 0.91 mW. Press the PUSH ENTER button
after setting the range knob of the laser power meter, and save
the adjustment results. ("LD SAVE $
moment.)
5. Then "LD 7.0 mW $ " will be displayed.
6. Move the multi-stick so that the reading of the laser power meter
becomes 6.9 to 7.1 mW, press the PUSH ENTER button and
save it.
Note : Do not perform the emission with 7.0 mW more than 15
seconds continuously.
SAVE"
Laser power
meter
Digital volt meter
" will be displayed for a