4FXC-028
When a Problem Cannot Be Solved
Contact your local authorized Canon dealer or the Canon help line.
IMPORTANT
Do not disassemble or repair the machine yourself
If you disassemble or repair the machine yourself, it may not be covered by warranty.
When Contacting Canon
When contacting us, have the following information ready:
Product name (LBP664Cx / LBP663Cdw / LBP623Cdw / LBP621Cw)
Dealer where you purchased the machine
Details about your problem (such as what you did and what happened as a result)
Serial number (found on the label on the back side of the machine)
LBP664Cx / LBP663Cdw
LBP623Cdw
LBP621Cw
NOTE
Checking the serial number from the operation panel
Select <Status Monitor> (
) 
<Device Information>/<Device Status> <Serial Number>.
) <Device Information>/<Device Status> <Serial Number>.