Hitachi 27FX48B Operating Manual page 7

Installation
Amplifier Connection (TO AUDIO AMP)
Connect to an external audio amplifier input for listening to a stereo system.
Audio Adjustments
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Note:
Select INTERNAL SPEAKER ON located in the AUDIO menu on screen.
Set amplifier volume to minimum.
Adjust TV volume to desired level.
Adjust amplifier volume to match the TV.
Select INTERNAL SPEAKERS OFF&VAO from AUDIO menu.
Volume, mute, bass, treble and balance are now controlled from the "IV.
TO AUDIO AMP terminals cannot be connected directly to external speakers.
In OFF&FAO the volume is controlled by the external amplifier.
TERMINALS ON BACK OF TV
AUDIO AMP
CABLES NOT SUPPLIED
7