Canon BJC-620 - Manual (Page 73)

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Before contacting Canon, identify your printer problems and make sure you have
the following information:
z Product name - BJC-620
z Serial number
z Place of purchase
z Nature of problem
z Steps you have taken to solve the problem and the results
The serial number is located on the label on the back of the printer:
Attempting to repair the printer yourself may void the limited warranty as to that
repair. See the limited warranty information at the back of this manual for details.
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Chapter 5