Hitachi VT-UX615A - Manual (Page 35)

PRE-TUNING THE VCR TUNER
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3 Press the (2) button to select "VCR SETUP".
4 Press the (1) button to select AUTO BLUE "ON" or "OFF".
ON: The screen becomes blue and mutes sound when a channel without a broadcast signal
on the VCR or a channel on which broadcasting has finished.
• If the signal is too strong, this function may not operate even if you specify . During
playback this function does not operate.
OFF: The AUTO BLUE feature is switched off.
5 Press the GUIDE button to end the setting.