Sharp 4470 FO-4470 Operation Manual - Page 129

Problems and Solutions 9. Troubleshooting The quality of copies is poor and/or black lines appear. • Any dirt or material on the scanning glass will cause lines to appear on copies and transmitted faxes. Clean the scanning glass as explained in Chapter 8. Dots appear at regular intervals on received documents and copies. • The drum cartridge may be damaged. Replace the drum cartridge. The printing paper comes out blank when you try to receive a document. • Make sure that the document is loaded properly in the feeder of the transmitting machine. Make a copy or print a report to confirm the printing ability of your machine. General problems Problem Solution Nothing appears in the display. • Make sure the power cord is properly plugged into a power outlet and the power switch is turned on. • Connect another electrical appliance to the outlet to see if it has power. The machine does not respond when you press any of its keys. • If a beep sound is not made when you press the keys, turn off the power switch and then turn it on again several seconds later. Automatic document • Check the size and weight of the document (see feeding does not work for Transmittable Documents in Chapter 2). transmission or copying. No reception occurs when polling is attempted. • Make sure you have not run out of paper. • Make sure the transmitting machine is in automatic reception mode. • If the transmitting machine has polling security, make sure that your fax number has been entered both in your machine and in the transmitting machine. 127