This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty:
a. to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b. to repair damage resulting from improper use or connection to incompatible equipment;
c. to repair any damage or malfunction caused by the use of non-Tektronix supplies or consumables;
d. to repair a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product;
e. to repair damage or malfunction resulting from failure to perform user maintenance and cleaning at the frequency and as prescribed in the user manual; or
f. to repair this product after the limit of its duty cycle of 20,000 pages per month has been reached; all service thereafter shall be billed on a time and material basis.