Black lines on prints...

HI
I have a Sharp MX-3500N. today I found some light lines on my prints. I started to clean the printers as i have been learned before but after cleaning the lines become bigger and stronger. for your reference i will put a picture of the problem.
20140607_110257.jpg
P.S: the K Blade has been replaced on Feb because of the lines on print and copy too.
I heard about problem on Drum... may be it has been damaged and the lines on them make this problem.....
do you have any idea? please advise?


Thanks
MaHi

Attached Images

• 20140607_110257.jpg (492.2 KB)