Canon C755 사용자 설명서

Chapter 13

Troubleshooting

■ Faxes do not print.

The protective tape may not be removed from the BJ cartridge.
• Be sure to remove the protective tape from the BJ cartridge before you install it. 

The BJ cartridge or tanks may not be installed properly.
• Make sure the BJ cartridge and tanks are installed properly. (

The BJ cartridge print head may need cleaning.
• Refer to the flow chart (

p. 12-8) and clean the BJ cartridge print head if necessary.

The BJ cartridge or tanks may need to be replaced.
• Determine if the problem is with the BJ cartridge or tanks (

necessary. (

■ Fax images print blotched or uneven.

The telephone lines may be in poor condition, or you may have a bad connection.
• Error Correction Mode (ECM) sending/receiving should eliminate such problems.

However, if the telephone lines are in poor condition, you may have to try again.

The sending fax machine may not be functioning properly.
• The sending fax machine usually determines the fax’s quality. Call the sender and

have them make sure the top cover and scanning glass of their fax machine are
clean.

■ Cannot receive 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 received in normal mode without error checking.

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

■ Errors occur frequently while receiving.

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

The sending fax machine may not be functioning properly.
• Call the sender and have them check that their fax machine is functioning properly.

Telephone Problems

■ You cannot dial.

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