Epson LQ-510 User Manual - Page 183

Problem The print is faint or uneven (continued). The printout is faint. Dots are missing in the printed characters or graphics. A line of dots is missing in the printout. ABCD Solution Printing The ribbon may be worn out. A worn ribbon can damage the print head and should be replaced. Install a new ribbon cartridge. See Chapter 6. The paper thickness lever may not be set correctly for the paper you are using. Set the paper thickness lever to match the thickness of your paper. See Chapter 2. The print head is damaged. Stop printing and contact your Epson dealer to have the printer repaired. Dots are missing in random positions. ABCD There is either too much slack in the ribbon or the ribbon has come loose and gotten caught on something. Stop printing, turn off the printer, and reinstall the ribbon cartridge. See Chapter 6. Troubleshooting 7-7