If the Printhead malfunction is not covered by this Limited Warranty or the applicable warranty period has expired or has not been sufficiently established by appropriate documentation, you will be required to replace the Printhead at your expense. This warranty shall be void and of no force canon plotter ipf750 effect if the Printhead is damaged as a result of a abuse, neglect, mishandling, improper cleaning, unauthorized repairs or alteration of the Printhead, or a Product in which the Printhead is incorporated, electric current fluctuation, or accident, b improper use, including failure to follow operating or maintenance instructions in, or environmental conditions prescribed in, Canon's operator's manual or other documentation, c installation or repair by other than service representatives qualified by Canon who are acting in accordance with Canon's service bulletins, or d use of supplies or parts other than those distributed by Canon which damage the Printhead or cause abnormally frequent service calls or service problems.