MDS-JE630 - Sony Audio Service Manual (repair manual). Page 7

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IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OF
BD BOARD) ARE REPLACED
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 optical pick-up label. 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 Procedure:
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. Turn the 
[        AMS        ]
 knob to display “[Service]”, and press the 
[YES]
 button.
3. Turn the 
[        AMS        ]
 knob to display “Iop Write” (C28), 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 label.
To select the number : Turn 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 Procedure:
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. Turn the 
[        AMS        ]
 knob to display “[Service]”, and press the 
[YES]
 button.
3. Turn the 
[        AMS        ]
 knob to display “Iop Read” (C27).
4. “@@.@/##.#” is displayed and the recorded contents are displayed.
@@.@ : indicates the IOP value on the optical pick-up label.
##.#
: indicates the IOP value after adjustment
5. To end, press the 
[        AMS        ]
 knod or 
[MENU/NO]
 button to display “Iop Read”. Then press the 
[REPEAT]
 button.
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