Sony MDS-JB920 Service Manual page 7

IOP Data Recording and Display When Pickup and Non-volatile Memory (IC171 of BD board) are Replaced
The IOP value labeled on the 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 pick-up or non-volatile memory (IC171 of BD board), record the IOP
value on the pick-up according to the following procedure.
Record Precedure:
[ AMS ] ≠
1. While pressing the
and p button.
[ ]
[ AMS ] ≠ ±
2. Rotate the
≠ ±
[ AMS ]
3. Rotate the
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
To select the digit : Press the
[YES]
6. When the 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
8. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop
Write".
[REPEAT]
9. Press the button to complete. "Standby" will be displayed.
Display Precedure:
[ AMS ] ≠
1. While pressing the
and p button.
[ ]
[ AMS ] ≠ ±
2. Rotate the
±
[ AMS ] ≠
3. Rotate the
4. "@@.@/##.#" is displayed and the recorded contents are displayed.
@@.@ : indicates the Iop value labeled on the pick-up.
##.# : indicates the Iop value after adjustment
≠
[ AMS ]
5. To end, press the
"Standby".
knob and p button, connect the power plug to the outlet, and release the
± [ ]
knob to display "[Service]", and press the
knob to display "lop.Write" (C28), and press the
[ AMS ] ≠ ±
knob.
[ AMS ] ±
≠
knob.
knob and p button, connect the power plug to the outlet, and release the
± [ ]
knob to display "[Service]", and press the
knob to display "lop.Read" (C27).
±
[MENU/NO]
button or
[YES]
button.
[YES]
button.
[YES]
[YES]
button.
button to display "Iop Read". Then press the
– 7 –
≠
[ AMS ]
button.
≠
[ AMS ]
[REPEAT]
button to display
±
knob
±
knob