Curtis DVD504 - Manual (Page 14)

Video port setup
The DVD player is equipped with the following video ports:
Composite Video (V) (Always active)
S-Video (Default option)
The DVD player has been pre-set at the factory to
Composite Video (V) and S-Video outputs, as default settings.
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The player is equipped with the following video output ports:
Composite Video and S-Video always
active, does not need setting.
GETTING ST ARTED