I have a Phaser 6180 and just recently started having yellow lines appear on the left side of each print out. They are about 1 inch apart and one inch long. There was a line of yellow showing on the transfer unit as well. (Photo attached.)
The yellow cartridge is half full, and until now has been printing fine.
I also got a message that the transfer unit needed replacing (the impression count on the machine is over 56,000). So I did that today, hoping it would clear up the problem.
However, now the brand new transfer unit has some yellow on it as well and the yellow stripes persist on the print outs. (Photo also attached.)
Finally, not sure if this is related or not, but when I check the supply levels, it says the door is open on the machine. It is not, and that's the only place I see that message.
Suggestions on clearing this up? The yellow toner cartridge is half full and cost a fortune so I don't want to throw it out and have to buy a new one if that's not the issue. And I don't want to damage a brand new transfer unit.