MDS-JE330 - Sony Audio Service Manual (repair manual). Page 7

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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 (IC171 of BD board),
record the IOP value on the optical pick-up according to the following procedure.

Record Precedure:
1. While pressing the  AMS  knob and  

p  button, connect the power plug to the outlet, and release the  AMS  knob and  p  button.

2. Rotate the  AMS  knob to display “[Service]”, and press the  YES  button.
3. Rotate the  AMS  knob to display “lop.Write”, and press the  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  AMS  knob.
To select the digit

: Press the  AMS  knob.

6. When the  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  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”.

9. Press the  REPEAT  button to complete.

Display Precedure:
1. While pressing the  AMS  knob and  

p  button, connect the power plug to the outlet, and release the  AMS  knob and  p  button.

2. Rotate the  AMS  knob to display “[Service]”, and press the  YES  button.
3. Rotate the  AMS  knob to display “lop.Read”.
4. “@@.@/##.#” is displayed and the recorded contents are displayed.

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

: indicates the Iop value after adjustment

5. To end, press the  AMS  button or  MENU/NO  button to display “Iop Read”. Then press the  REPEAT  button.