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How do I find Drum Encoder Disk on a Xerox 8560? I'm getting random blurring

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To find the encoder, remove the right cover and remove the only fan on that side.
Loosen the clear cover and clean the encoder and entire area thoroughly, including the wires.
If the problem returns, you may need to purchase a whole drum 020K14790

Whit
Item, Inc

Posted on Sep 13, 2010

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Phaser 8560 printing fuzzy. Machine menu screen illuminated but no display can not access onboard help due to screen failure


The cause of the blurry prints is that oil, from the maintenance kit, has leaked onto the drum encoder assembly. The drum encoder is responisble for position the Y-Axis or vertical direction of the print. The oil on the encoder is making the printer incorrectly position the drum as the pinthead is spray ink onto it, thus you get a blurry print. If you look closely, letters probably have a downward jag to them.
There are two ways to fix this. The cheapest and easiest method is to remove the right side cover, then the fan on the right. Behind that fan is the drum encoder wheel. Using a lint free cloth and isopropyl alchol (preferably 99%), clean all the oil off of the sensor disc. This method might work for a while, but the problem will ussually come back.

The second method would be to just replace the drum assembly. The drum assembly comes with a new encoder disc.

The display (menu screen) can easily be fixed by replacing the control panel (part# 848K06552). It's pretty simple to replace w/ no tools required. Here is video to show you how.


Aug 24, 2011 | Xerox Phaser 8560MFP Laser Printer

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Xerox phaser 8560 1st page is blurry. The 2nd page is OK.


The good news is that you don't need any parts.
The oil from the drum is drooling to the right side to the Drum Position Sensor is located.

Remove the right cover. Remove the fan. Loosen the clear plastic cover under that. Clean the sensor and all the wires with very pure Isopropyl or denatured alcohol.
The situation may reoccur every year or so.
Whit
Item, Inc.

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You don't need to remove it.

Remove the right cover, and the fan on that side. Partially remove the clear plastic cover of the encoder and go in with Isopropyl and Qtips.

Also clean the nearby wires and anything that could transport the oil

-Whit :)

May 14, 2009 | Xerox Phaser 8560MFP Laser Printer

1 Answer

I HAVE A XEROX 8560 THAT I AM GETTING BLURRED PRINT WITH, I DID THE CLEANING CYCLE AND THAT WORKED FOR A DAY AND A HALF. NOW THE FIRST TWO PAGES LOOK GOOD AND ALL THE REST ARE BLURRED?


Oil from the drum has ran off over the drum encoder position sensor.

Take the right cover off and find the fan. Remove it and loosen the clear plastic sensor cover underneatch. Clean the sensor and generally with Isopropyl and Q-tip.

Clean the nearby wires and anything that might be transporting more oil back to your sensor

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1 Answer

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On the right side of the machine. There is an encoder mounted to the end of the drum shaft. They are known to become contaminated with the silicon lubricant from the maintenance kit. That causes the drum to spin off speed somewhat randomly. You can take it off the shaft and clean it well with alcohol. Sometimes they need replaced, but if it is as intermittent as you are suggesting cleaning it should take care of your problem. Not all that uncommon.

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There are three typical reasons for fuzzy text

1. Y-axis drum rotation problem.
2. Wrong drum temperature.
3. X-axis movement problem.

Sometimes the y-axis encoder will get oil inside and confuse the sensors, causing fuzzy/blurry print.

Most likely the drum assembly will need replaced.

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Have you tried a different driver? Most of those phaser printers have a PS driver loaded, See if there are PCL drvers for that product, and try that. I went on the Xerox.com site and they have both PS and PCL 6 and PCL 5 drivers, I believe one of those will help your problem.
Now that being said, If you are getting the stretching on other programs, then the problem is the drum motor encoder is getting contaminated with silicon lubricant from the maintenance kit. That will cause that problem, But since you are saying it is with one specific program, I suspect a different driver will correct the problem.

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If it is blurred, the problem is the drum motor encoder. It picks up the silicon lubricant from the maintenance kit, and once its gets contaminated it causes the drum to run the wrong speed.
What you have to do is remove the right cover, looking from the front.
Then locate the drum. Its about mid way back on the machine. The encoder is in that area.
If you go to Xerox.com, there is a parts list and diagrams located under drivers and documentation.
Look up the parts list and the Drum encoder to locate it. It is not real hard to find, or remove and clean. What you want to clean it with is alcohol. No no, Not vodka..... use a strong rubbing alcohol to break down the silicon and clean the encoder, then put it back on the machine.
It may need replaced, but the majority of the time, cleaning the encoder resolves the problem.
You may just want to write down the part number when you locate it, just in case you would have to order one. But I really believe cleaning it will resolve your problem. It does fix the blurrs about 80 percent of the time.

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There is an encoder on teh drum motor that picks up lubricant from the maintenance kit and causes those blurs. It eneeds cleaned or replaced

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