Canon LASER CLASS 730i Service Manual page 125

LASER CLASS 730i/720i/710 Chapter 4: Maintenance and Service
4.4 Processing Communication Problems
4.4.1 Initial identification of problems
Since the facsimile must transmit picture information, a transmitter, a receiver and telephone
lines are required for this purpose. Transmissions may cause problems if one or more of the
there is poor.
FAX
Your
customer's
machine
To process communication ploblrems, first of all, it is necessary to narrow down the cause of
the problem. Thus, the procedures appearing below must be checked accordingly.
Does an error
appear on the
display?
Is copying
being done?
Do copying
Is copy
picture OK?
Communication problems
exist. Carry out the procedures
on the next page.
Figure 4-11 Procedures for Initial Identification of Trouble
Communication
Figure 4-10 Communication Trouble
Start
YES
NO
NG
OK
NG
OK
Scanning problem
trouble
Errors show on the display.
error massage page 4-11
error code page 4-18
General error
Page 4-30
NG
Test print
OK
Page 4-37
4-42
FAX
Communication
companion
machine
Printing problem
Page 4-30