Isolating A Trouble; 3-Point Communication - Canon G3 Error Code List

1. ISOLATING A TROUBLE

Facsimile is used for the exchange of image data, and requires a transmitter, receiver, and tele-
phone line. A trouble in any of these will adversely affect the transmission of an image.
When a trouble occurs in communication, an error code will be indicated. At times, the cause of
the trouble can readily be identified by means of an error code, while at other times it is difficult to
find out whether the cause is in the transmitter, receiver, or telephone line.
A 3-point communication is used to find out the source of a specific trouble:

1.1 3-Point Communication

Start
TX/RX?
TX
A to C
OK
C to B
OK
Check the line
A: machine of the user
B: machine of the other party
C: test machine within the same block
RX
NG
Check A
NG
Check B
and the line
Figure 1 3-Point Communication
A-1
Trouble
FAX:A
FAX:C
(best if of the same model as A)
NG
C to A
OK
NG
B to C
OK
Check the line
Appendix
FAX:B
Check A
Check B
and the line