Horizontal magenta lines - Kyocera FS-C5015N Laser Printer

Replace the defective magenta cartridge

IMAGE SENSOR defectives. replace it.

try to replace magenta , Yellow , CYAN

clean the print heads and align them

Hello,If they are vertical lines then the most common reason for this is that containers for the waste toner of the magenta and yellow cartridges are full. This is not a common problem if you use original HP cartridges, but if you use compatible or refilled cartridges it happens. If you get the magenta and yellow cartridge out and look at the the green OPC drum you would see these 2 lines. You can carefully shake the cartridges 5-6 time HORIZONTALLY and the problem will probably disappear for a couple of pages. If this happens then you must replace the magenta and the yellow cartridges. Post back results here. Hope this helps

Epsons are notorious for this sort of problem, especially in used infrequently as ink residue dries on the print head; try using a cleaning cartridge, or swab around relevant print head with cotton bud and ethanol/isopropyl alcohol. Here are examples of cleaning carts, there are others http://www.internet-ink.co.uk/epson-cleaning-cartridges/ http://www.icompinkcartridges.co.uk/epson-r200-r300-r220-r320-r340-cleaning-kit.html

providing your magenta ink tank is full it sounds like your magenta nossile is clogged in your print head. you can try washing it out in hot water, or letting it soak in hot water for a period of time, and drying it out before putting it back in your printer. if the magenta nossile is burnt out you won't be able to bring it back from the dead. in that case it's time for a new printhead

it is the problem your copier drum unite

Replace the magenta toner and clean the printer inside, see
Clean your laser printer safely.

change your magenta led it sounds like that may be faulty big job if not theat then its a new rip baord which is under the cover