Philips 20PT643F Service Manual page 78

Turn the television set 'off' by using the 'POWER' button on the remote
§
control transmitter or the local keyboard.
Disconnect the television set from AC power for at least ten seconds.
§
Reconnect the television set to AC power.
§
Turn the television set 'on' by using the 'POWER' button on the remote
§
control transmitter or the local keyboard.
A2T (TV A2 Threshold)
Default value is 250.
To adjust A2T:
1. To enter SDAM, press the following key sequence on the remote control
transmitter: 0 6 2 5 9 6 directly followed by the MENU button (do not allow the
display to time out between entries while keying the sequence).
2. Use the MENU UP/DOWN keys to highlight the AUDIO sub menu.
3. Press the MENU LEFT/RIGHT keys to enter the AUDIO sub menu.
4. Use the MENU UP/DOWN keys to select A2T.
5. Use the MENU LEFT/RIGHT keys to adjust the value of A2T to 250.
6. Press the MENU button to return to the top level SDAM menu.
7. To ensure the A2T setting is saved:
Turn the television set 'off' by using the 'POWER' button on the remote
§
control transmitter or the local keyboard.
Disconnect the television set from AC power for at least ten seconds.
§
Reconnect the television set to AC power.
§
Turn the television set 'on' by using the 'POWER' button on the remote
§
control transmitter or the local keyboard.