MDS-PC2 - 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  INPUT  button and  

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

2. Press the  

+  button to display “[Service]”, and press the  ^ “PROGRAM”  button.

3. Press the  

+  button to display “lop.Write”, and press the  ^ “PROGRAM”  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 : Press the  

+  button.

To select the digit

: Press the  

r “PROGRAM”  button.

6. When the  

^ “PROGRAM”  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  

^ “PROGRAM”  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  

6 “1”  button to complete. “Standby” will be displayed.

Display Precedure:
1. While pressing the  INPUT  button and  

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

2. Press the  

+  button to display “[Service]”, and press the  ^ “PROGRAM”  button.

3. Press the  

+  button to display “lop.Read”, and press the  ^ “PROGRAM”  button.

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  

r “PROGRAM”  button or  p “PROGRAM”  button to display “Iop Read”. Then press the  6 “1”  buttun.

*Note:
As this unit has only a few buttons, one button is assigned with several functions in the test mode.
Press the  INPUT  button to switch the functions.
Each time the  INPUT  button is pressed, the display switches in the following order; “PROGRAM” 

n “1” n blank n “PROGRAM”

The functions of each button change with the display.
For simplicity, operations of the  INPUT  button will not be described here.
Instead, symbols are added to the names of buttons. Press the  INPUT   button as required to switch the display.

Example)   

p “PROGRAM”   : Display “PROGRAM” and press the  p  button.   p “1”  : Display “1” and press the  p  button.