sendpiks
09-29-2020, 11:57 PM
Hi Everyone and thank you for your help and knowledge.
I have very unusual printing effect that looks very common but after carefully looking its not so easy.
Please look at attached scanned test page. On the bottom you can see white strips on 50% and 25% density. I KNOW What is the problem of these strips, this is dirty corona mesh in yellow imaging unit. I KNOW how to solve this problem, just to replace imaging unit.
Most interesting goes next. After replacing the unit to the new one same defect happens on new unit after ~10K prints. I replaced unit again, and again after 10K prints I have these strips. I tried FOUR different units. All the same. I dismantled one unit and cleaned corona mesh, put it back and after 10K prints it have same defect. I replaced developer, no changes.
I have no more ideas what happened. I have about 10 printers of same model and have this defect only on one printer only on yellow color.
Only original toners and unites was used.
what is the possible problem? Why printer contaminate mesh? Why only 1.5 cm from the bottom?
Thank you for ANY ideas.
I have very unusual printing effect that looks very common but after carefully looking its not so easy.
Please look at attached scanned test page. On the bottom you can see white strips on 50% and 25% density. I KNOW What is the problem of these strips, this is dirty corona mesh in yellow imaging unit. I KNOW how to solve this problem, just to replace imaging unit.
Most interesting goes next. After replacing the unit to the new one same defect happens on new unit after ~10K prints. I replaced unit again, and again after 10K prints I have these strips. I tried FOUR different units. All the same. I dismantled one unit and cleaned corona mesh, put it back and after 10K prints it have same defect. I replaced developer, no changes.
I have no more ideas what happened. I have about 10 printers of same model and have this defect only on one printer only on yellow color.
Only original toners and unites was used.
what is the possible problem? Why printer contaminate mesh? Why only 1.5 cm from the bottom?
Thank you for ANY ideas.