Philips 20PT643F Service Manual page 67

6. Use the MENU UP/DOWN keys to highlight the TUNER sub menu.
7. Press the MENU LEFT/RIGHT keys to enter the TUNER sub menu.
8. Use the MENU UP/DOWN keys to select AGC.
9. Use the MENU LEFT/RIGHT keys to adjust the AGC value (default value is 27)
until the DC-voltage at pin 1 of the tuner lies between 3.8 V and 2.3 V.
10. Press the MENU button to return to the top level SDAM menu.
11. To ensure the AGC change takes effect:
Turn the television set 'off' by using the 'POWER' button on the remote
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control transmitter or the local keyboard.
Disconnect the television set from AC power for at least ten seconds.
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Reconnect the television set to AC power.
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Turn the television set 'on' by using the 'POWER' button on the remote
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control transmitter or the local keyboard.
SL (Slicing Level)
This adjustment sets the sync slicing level for non-standard signals. You must turn it 'on'
to help correct picture instability in premium decoded cable channels.
OFF: slicing level dependent on noise detector.
ON: fixed slicing level of 70 %.
To adjust SL:
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 TUNER sub menu.
3. Press the MENU LEFT/RIGHT keys to enter the TUNER sub menu.