Cannot send using Error Correction Mode (ECM).

The other party’s fax machine may 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. (ECM TX, p. 9-5)

Errors occur frequently while sending.

The telephone lines may be in poor condition, or you may have a bad connection.

• Lower the transmission speed. (TX START SPEED, p. 9-5)

Receiving Problems

Cannot receive a fax automatically.

The machine may not be set to receive automatically.

For the machine to receive faxes automatically, the receive mode must be set to FAX ONLY MODE, FAX/ TEL AUTO SW, or ANS.MACHINE MODE (Chapter 5). If you have set ANS.MACHINE MODE, confirm

that an answering machine is connected to the machine and that it is turned on with an outgoing message properly recorded. (Quick Start Guide)

The machine’s memory is full.

Print or delete any documents stored in memory (pp. 4-14, 4-15) to free up space in the machine’s memory. Then ask the other party to resend the fax.

An error may have occurred during reception.

Check the LCD for an error message. (p. 8-1)

Print an ACTIVITY REPORT and check for an error. (p. 7-2)

The telephone line may not be connected properly.

• Make sure all line connections are secure. (Quick Start Guide)

The machine does not switch automatically between telephone and fax reception.

The machine may not be set to switch automatically between telephone and fax reception.

For the machine to switch automatically, the receive mode must be set to FAXTEL AUTO SW or ANS.MACHINE MODE (Chapter 5). If you have set ANS.MACHINE MODE, confirm that an answering

machine is connected to the machine and that it is turned on with an outgoing message properly recorded. (Quick Start Guide)

An error may have occurred during reception.

Check the LCD for an error message. (p. 8-1)

Print an ACTIVITY REPORT and check for an error. (p. 7-2)

The sending fax machine cannot send the CNG signal that tells the machine that the incoming signal is a fax.

Some fax machines cannot send the CNG signal that tells your machine the incoming call is from a fax machine. In such cases, you will have to receive the fax manually. (p. 5-4)

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Canon MPC600F/400 Receiving Problems, Cannot send using Error Correction Mode ECM, Errors occur frequently while sending