Sony MDS-JB930 Service Manual page 7

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:
[ AMS ]
1. While pressing the ≠
[ ]
and p button.
[ AMS ]
2. Turn the ≠ ±
[ AMS ]
3. Turn 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 label.
To select the number : Turn 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".
[FILTER]
9. Press the button to complete.
Display Procedure:
[ AMS ]
1. While pressing the ≠
[ ]
and p button.
[ AMS ]
2. Turn the ≠ ±
[ AMS ]
3. Turn the ≠ ±
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
[ AMS ]
≠
5. To end, press the
FORCED RESET
The system microprocessor can be reset in the following procedure.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Procedure :
Disconnect the power plug, short-circuit jumper wire of JW705 and JW706 (RESET).
– BAT BOARD (Component Side) –
[ ]
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]
±
knob or
[YES]
button.
[YES]
button.
[YES]
[YES]
button.
button to display "Iop Read". Then press the
[ AMS ]
≠
button.
[ AMS ]
≠
[FILTER]
button.
±
knob
± knob
7