Apparatus for removing foreign materials from the head of a video

An apparatus for removing foreign materials from a head of a video apparatus by closely contacting a head cleaner to a drum, which forms part of a video mechanism in the video apparatus, during loading or unloading of a video tape, comprising:

• a synchronizing signal detecting section connected to the video mechanism, for detecting synchronizing signals from among video signals amplified by a pre-amplifier of the video mechanism, and for converting the detected synchronizing signals into a DC voltage output;
• an envelope detecting section connected to said synchronizing signal detecting section, for detecting envelope signals from among the video signals, and for converting the detected envelope signals into a DC voltage output;
• a comparing section connected to said synchronizing signal detecting section and said envelope detecting section, for comparing the output of said synchronizing signal detecting section with the output of said envelope detection section in order to measure a state of removal of the foreign materials;
• and
• a microcomputer connected to said comparing section, for controlling said head cleaner in accordance with an output of said comparing section.