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وجدت الطريقه

To enter service mode

Press the following buttons on the remote control in quick sequence.

STANDBY=>DISPLAY=>5=>VOLUME(+) =>POWER.

Press digit buttons 1 & 4 to call an item for adjustment
Press digit buttons 3 & 6 to raise or lower the data value to selected item.
Press "Muting" button to write the adjusted data value to memory.
Press "0" (Zero) button to execute writing.
If you do not press Zero button to execute the adjusted data into memory, the adjsuted value will not be entered into memory.

To exit from service mode, press Power button once. The TV will come into standby mode. Press Power button again, The Tv will switch ON with adjusted data values.