Black Lines running down the right side outside of the print area
I had thin gray lines all over the print area, and the REPLACE COLOR PCU error code was lit.
I replaced the COLOR PCU - No help but the error went away.
I replaced the BLACK TONER - No help.
I replaced the BLACK PCU - The gray lines went away, but now I have thick light colored black lines running down the right side of the paper outside of the print area. I looks like the markings of a dirty roller, but there is no roller that comes in contact with that side of the paper.
I tried running about 20 pages of logs config pages and color test pages.
The results were dark lines for a few pages then they would fade slightly for a page or two then get dark again.
I inspected the BLACK PCU - Looks clean.
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Hi, thin black lines are most likely (but not definitely) caused by something in the black PCU (photoconductor unit), either the drum or the charger. Replacing the black PCU will likely get rid of your lines. The Ricoh code for a black PCU if you don't already have one is 402448.
Pull out the color photo conductor unit. If you see lines on any of the green drums replace the color photo conductor unit. You can also get color registration errors if the transfer unit is scrached. my first recomendation is to look at the color pcu unit and replace it if you see any lines on it. Also pull out and inspect the black pcu unit.Let me know what you find.
Most of the time when I find this happening on a printer, not just Ricoh's it turns out to be the PCU (photo conductor unit). The color PCU is one unit and the black is a seperate unit. Hope this helps.
It must be the black pcu , the cleaning blade picks up dirt and causes these lines , it can also be the black developer giving you trouble , if you want be very carefull aand strip the pcu open you will see the lines only on the inside and not from outside , then you will know if it is developer or the cleaning blade