DHC-VZ50MD, HCD-VZ50MD - Sony Audio Service Manual (repair manual). Page 10

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The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to
look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD (MD) board),
record the Iop value on the optical pick-up according to the following procedure.

Record Precedure:
1. In the power ON state, set the function to MD, and while pressing the  DISPLAY  and  x  buttons together, press  V-GROOVE  .
2. Move the Multi stick to display “[Service]”, and press the  PUSH ENTER  button.
3. Move the Multi stick to display “Iop Write” (C05), and press the  PUSH ENTER  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 : Move the Multi stick.
To select the digit

: Press the  MD REC MODE  button while REC IT is lit.

6. When the  PUSH ENTER  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  PUSH ENTER  button.
8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop

Write” (C05).

Display Precedure:
1. In the power ON state, set the function to MD, and while pressing the  DISPLAY  and  x  buttons together, press  V-GROOVE  .
2. Move the Multi stick to display “[Service]”, and press the  PUSH ENTER  button.
3. Move the Multi stick to display “Iop Read” (C26).
4. “@@.@/##.#” is displayed and the recorded contents are displayed.

@@.@ : indicates the Iop value labeled on the optical pick-up.
##.#

: indicates the Iop value after adjustment

5. To end, press the  NAME EDIT/CHARACTER  button while REC IT is lit, or press the  MD REC MODE  button to display “Iop Read”

(C26).