Canon fax-phone b740 Manuel

Chapter 13

Troubleshooting

The receiving fax machine may not be a G3 fax machine.
• Make sure the receiving fax machine is compatible with the copier/fax (which is a G3

fax machine).

■ Images on received faxes from the copier/fax are spotted or dirty.

The receiving fax machine may not be working properly.
• Check the copier/fax by making a copy (

p. 10-2). If the copy is clear, the problem

may be in the receiving fax machine.

The copier/fax’s scanner area may be dirty.
• Clean the scanner components. (

■ Cannot send using Error Correction Mode (ECM).

The other party’s fax machine may not support ECM.
• Some fax machines do not support ECM. If the other party’s fax machine does not

support ECM, then the document is sent in normal mode without error checking.

ECM may be disabled.
• Make sure ECM is on. (

■ Errors occur frequently while sending.

The telephone lines may be in poor condition, or you may have a bad connection.
• Lower the transmission speed. (

Receiving Problems

■ Cannot receive a fax automatically.

The copier/fax may not be set to receive automatically.
• For the copier/fax to receive faxes automatically, the receive mode must be set to

FAX ONLY MODE

, 

Fax/Tel Mode

, 

ANS.MACHINE MODE

, or 

DRPD

(

1

Chapter 8,

Receiving Faxes). If you have set 

ANS.MACHINE MODE

, confirm that an answering

machine is connected to the copier/fax and that it is turned on with an outgoing
message properly recorded. (

The copier/fax may have a document stored in memory.
• Print out any documents stored in memory. (

An error may have occurred during reception.
• Check the LCD for an error message. (

• Print an Activity Report and check for an error. (

The multi-purpose tray may be empty.
• Make sure paper is loaded in the multi-purpose tray. (

The telephone line may not be connected properly.
• Make sure all line connections are secure. (