Panasonic TH-50LX800K Operating Instructions Manual page 16

Press MENU button, then select Channel and press OK to
enter Digital Channel setup, press OK to select Teletext
Setup.
Teletext Setup: Press OK and then use
preferred teletext or Decoding Page Language.
Press MENU button, then select Channel and press OK to
enter Digital Channel setup, press OK to select Audio Setup.
Audio Setup:
(1)Audio Description:Include Off and On.
(2)Audio Description Mixing Level:Press OK and then use
◄/► to set Audio Description Mixing Level.
(3)Audio Type: You can set the audio type.
(4)Primary Preferred Language:Press OK and then use
▲/▼ to select Primary Preferred Language.
(5)Secondary Preferred Language:Press OK and then use
▲/▼ to select Sencond Preferred Language.
LCN: Select on or off.
Auto service Update: Select on or off.
Update Scan(Auto Scan):Include Off and On.
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▲/▼ to select