Michaelka Posted May 28, 2010 Report Share Posted May 28, 2010 Hi evereybody, i am looking for help urgently - i get prints from my 350er with stripes as shown in the file. I cleaned the drive wheel on the front side and any parts arraounfd that - did not help. As visible in the picture there are areas with stronger and less stronger lines; dimensions you can see by cm. Problem suddenly starts within one print. Does anybody has an idea? Thanks to all Kind regards Michaelka Quote Link to comment Share on other sites More sharing options...
Michaelka Posted May 28, 2010 Author Report Share Posted May 28, 2010 another note: when i print 20 or 30 sheets, lines are more or less visible, on several prints you see nothing ,then it starts again - it is not consistent in appearence from sheet to sheet and within one sheet. mk Quote Link to comment Share on other sites More sharing options...
sisir Posted May 28, 2010 Report Share Posted May 28, 2010 I am also facing same problem. Quote Link to comment Share on other sites More sharing options...
Alpek Posted May 28, 2010 Report Share Posted May 28, 2010 Hi! I had a similar problem and was solved by tensioning the subscaning unit belt. Check this post. http://www.minilabhelp.com/forum/Blah.pl?m-1271677404/s-new/#num10 Quote Link to comment Share on other sites More sharing options...
Michaelka Posted May 30, 2010 Author Report Share Posted May 30, 2010 Hi, thanks for answers everybody, i tried to adust the tension, but it didnt help (higher tension). after this i replaced the whole subscan-unit took from another 350-minilab which we dont use at the moment - but still the same stripes on paper!! possible the second unit could have the same problem - printers both are about ten years old. Or could it be a laser-problem instead? Any kind of opinion or answer will be appreciated. kind regards Michaelka Quote Link to comment Share on other sites More sharing options...
yustas Posted May 31, 2010 Report Share Posted May 31, 2010 Check grounding. Quote Link to comment Share on other sites More sharing options...
sisir Posted May 31, 2010 Report Share Posted May 31, 2010 Grounding is Ok. I checked the Laser Unit with another Frontier and get the same result. So, I decided that the problem is arising from Laser Unit. But, I want to know which part of Laser Unit is faulty. Is there any source for parts of Laser Unit? Quote Link to comment Share on other sites More sharing options...
Michaelka Posted May 31, 2010 Author Report Share Posted May 31, 2010 Hi Sisir and Yustas, could you please explain how to check grounding? Thank you MK Quote Link to comment Share on other sites More sharing options...
Kevbo37 Posted June 1, 2010 Report Share Posted June 1, 2010 I can't tell if these lines are parallel to the direction of the paper travel of if they are perpendicular. If they are parallel as I suspect, and it is a laser related issue as Sisir had determined, then it is optical noise on the laser unit. You can try to "optimized temperature" which might help. Other than that you must have the laser replaced. Quote Link to comment Share on other sites More sharing options...
Michaelka Posted June 1, 2010 Author Report Share Posted June 1, 2010 Hi, for better understanding i added a arrow to the first image which shows the feed direction. mk Quote Link to comment Share on other sites More sharing options...
Alpek Posted June 1, 2010 Report Share Posted June 1, 2010 But I am of opinion that any laser related problem has an error to show. If there is no error, you should think of something minor, mostly simple mechanical problems. I had also panicked following some posts from money orientated helpers , remember some of the people here are for commercial purposes and they will rush to tell you to contact them for laser repair. Check again. Quote Link to comment Share on other sites More sharing options...
Kevbo37 Posted June 2, 2010 Report Share Posted June 2, 2010 Since these lines are perpendicular to the feeding direction I believe you should go back and find a problem with your subscanning section not the laser unit. Quote Link to comment Share on other sites More sharing options...
Michaelka Posted June 2, 2010 Author Report Share Posted June 2, 2010 Perhaps Ball bearings? mk Quote Link to comment Share on other sites More sharing options...
Kevbo37 Posted June 2, 2010 Report Share Posted June 2, 2010 Yes I have heard of the bearings going bad to cause this. It looks like you already adjusted the belt. The motor that drives that section is a stepper motor, it is also conceiveable that it could be at fault. Quote Link to comment Share on other sites More sharing options...
Michaelka Posted June 3, 2010 Author Report Share Posted June 3, 2010 Hi Kevbo37, thanks for answer, belt is already adjusted, so now i will replace the motor. regards mk Quote Link to comment Share on other sites More sharing options...
Kevbo37 Posted June 3, 2010 Report Share Posted June 3, 2010 Make sure to check all the bearings on every roller in that section before replacing the motor. It could be as simple as any of the other bearings. Look for debris under the belt or between any gears. Anything that would cause it to not move the paper smoothly can cause this type of artifact on the prints. Quote Link to comment Share on other sites More sharing options...
Sarah Posted November 17, 2010 Report Share Posted November 17, 2010 Hi, Was this problem ever resolved? I am having the same issue on LP5700. Have tried everything from chemistry, laser, aom to subscan.... Quote Link to comment Share on other sites More sharing options...
Michaelka Posted November 22, 2010 Author Report Share Posted November 22, 2010 it was solved by changing ball bearings...but actually it appears again sometimes only on a few centimeters of paper, next print is ok and so on, i am watching that, but i am not able to find out the reason. k.r. mk Quote Link to comment Share on other sites More sharing options...
sisir Posted November 23, 2010 Report Share Posted November 23, 2010 Please check the sub-scanning motor and sub-scanning belt (steel belt). If possible, replace the bearings inside the sub-scanning motor. Quote Link to comment Share on other sites More sharing options...
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