printech
04-22-2010, 04:08 AM
I've got this C351 that started to fade on yellow when he IU was at only half it's life, replaced the yellow IU and the prints were OK for a while (abou 10k copies) then the same thing happened. When trying to print a yellow test page (in tech mode) at 255 density, it starts pretty well on the page and then fades out . I checked the toner supply, the gears turn OK, there is no blockage ( I don't think the problem is with the toner supply motor because there is one motor for both yellow and magenta hoppers). I weighed the IU's and the yellow is abut 250 grams lighter than the others , like there is not enough developer or toner in it. The average toner coverage for yellow is about 6% , replaced the toner cartridge as well (KM toner) but no result. It seems that the problem resides in either the developer or toner supply. Any ideas about this issue?