My T630 started leaving big black lines on printed pages so I tried changing toner cartridges and no fix. I just installed maintenance kit and it seemed to make it a little better but still leaves consistent pattern of lines on each page. I attached a pic of the lines. I thought for sure replacing the fuser and transfer rollers would fix the problem. I also tried two different toner cartridges and they both leave the same lines on the pages. Does anyone have any idea what might be causing the issue?