Canon Kabushiki Kaisha

Jun-ichi Arakawa

Yuichi Kaneko

In a printing apparatus of the type in which a printing head is detachable to a carriage, a detecting circuit is provided for detecting whether or not a printing head 8 is mounted on a carriage. A CPU 2 included in the printing apparatus supervises the output of the detecting circuit at every predetermined time interval. When determined the printing head 8 is not mounted, the supplement of the driving voltage for the printing head 8 is suspended.

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Yokohama, Japan

Jun-ichi Arakawa