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Re: Showdowing on printed pages
Usually the Drum and the cleaning blade must be replaced together. Hope you done this already, if not replace the cleaning blade.
The problem can be in the fuser unit. Pleace check and replace the Hot roller, thermistor and HR strippers as a set and also the pressure roller bushings.
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Ghosting appears often because of bad toner. If cartridges have been refilled, they have wrong toner in them. If drum has worn out it will usually tell you. All parts for this machine cost too much. If toner is not the problem, probably best to get a new machine rather than pay to get it fixed. Brothers are cheaper to run.
Need a little more info but if you are using a laserjet printer shadows or duplicate images usually come from worn out rollers in your fuser. Depending on your model fusers are available by themselves or as part of a maintenance kit. Replace the fuser and that should take care of the problem.
How many copies since the toner was installed? Did you "overshake" the cartridge and get some spilling out?
If there have been enough copies done to dispense of any excess or spilled toner, then the problem would most likely lay with the imaging drum itself. They vary in mileage, it may be time to replace that.
Sounds like a bad drum cartridge. Pull the toner/drum cartridge out of the machine and set it down. Press down on a (blue?) tab to release the toner cartridge, and you can lift the toner cartridge out of the drum cartridge. There is a cleaning blade in there - a soft plastic blade that rides against the drum and scrapes off toner that didn't get transferred to the paper. If it gets stuck off the drum surface, images repeat a few inches (one drum circumference) down the page.
A new DR-350 drum unit should fix it. have the machine's power on when replacing it. While the door is open, touch the CLEAR key. The display will read "REPLACE DRUM?" or something like that. Press 1 for Yes.
if you are getting copy quality issues on all aspects of the machine, IE, printing, copying, ADF, it looks like then you might need a new drum installed. please contact your local service department for service and make sure if you need supplies, to have those on hand before calling a tech to come service the machine. drums, developers, and toner are considered a supply item and are NOT carried by technicians unless otherwise stated in your local contract.
Replace the drum. The drum is failing.
When you replace the drum open the front door of the machine where thr drum and toner is.
Hit the clear/back button. Press 1
That resets the drum count after you replaced the unit.
You either have a bad toner cartridge or bad fuser. Measure the distance from and exact on image printered to the exact same spot on the page it appears again. If it's fuser it will be 41.0mm between image and defect. Any other spacing on the front of the page is usually cartridge.
Try replacing the cartridge first and if that doesnt fix the issue it's fuser.
Here's a link for the service manual. Look at page 117 to get a complete list on repetative defects and their causes.