Thank you for the reply.
The fuser and imaging units are at 50% life remaining.
Can you give me an idea which one might be causing the faint black line every 95mm?
Faint black lines are printing on paper, when comapred to 'Repeating Defects' troubleshooint guide for print quality, they match 95mm which indicates a problem with either Fuser or Imaging Unit.
When printing 'Fault History', printing has LED failures 61-373, and Fuser Failure 10-338.
This printer is older, is it worth repairing and can the LED be repaired, thank you,