88W0-040
Information to Have Ready When Contacting Us
Have the following information ready to ensure smooth service.
Product name (MF746Cx / MF645Cx / MF643Cdw / MF641Cw / MF543x / MF449x / MF445dw / MF441dw)
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)
MF746Cx
MF645Cx / MF643Cdw
MF641Cw
MF543x
MF449x / MF445dw / MF441dw
NOTE
Checking the serial number from the operation panel
<Status Monitor> 
<Device Information> <Serial Number>.
<Device Information> <Serial Number>. IMPORTANT
Do not disassemble or repair the machine yourself
If you disassemble or repair the machine yourself, it may not be covered by warranty.