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7425 style - Drum Cartridge Rebuilding Instructions
Xerox® 7425 style Drum Cartridges Reconditioning Information… for Xerox WorkCentre® 7425, 7428, 7435 (013R00647), WC-7525, 7530, 7535, 7545, 7556 (013R00662), Phaser® 7500 (108R00861),
& Phaser® 7800 (106R01582)
Let’s have a crack at one and see how they come apart for servicing.
This cartridge appears four times in each machine… the same cartridge will serve in any of the 4 color stations. The WC-7425, 7428, & 7435 use 013R00647 in all market regions. The cartridge is extremely similar to the Phaser 7500 (108R00861), WC7525 (13R662), & Phaser 7800 (106R01582) drum cartridges, although they are not interchangeable because of differences in the chip onboard each cartridge and also a few subtle physical differences on the front end cover. If you learn one, you know how to tackle any of them… but try not to mix up which cartridge you have in hand so you don’t run into problems. They come with a rectangular Installation Sleeve as shown in Photo #1.
The 7425 style Drum Cartridges use a Drum Reset CRUM (Customer Replaceable Unit Monitor) to keep track of how many copies a cartridge has run (see Photo #2). This chip limits the cartridge’s running life and will “time out” once the machine hits a limit of copies. The yield varies depending on how much volume the machine is running. A machine which runs an average of 6 pages per copy job or print job will yield approximately 60K before it calls for a new cartridge. If the customer runs shorter jobs (under 6 pages per run on average), the yield will be reduced down as low as 32K. If a machine runs longer runs, its yield will increase to yields as high as 80K impressions. I know… it’s kind of confusing. The important thing about this is that a machine in a low volume office will call for new drum cartridges long before the drums are actually worn out. When a replacement CRUM becomes available, replacing the CRUM will allow the cartridge to run a lot longer without much else being necessary. Drums, Blades, & Charge Rolls are now available.
If previous, similar types of drum cartridges are any indication, the Charge Rollers will also be an important consumable in these cartridges. Usually impacted toner on the Charge Rollers will affect copy quality long before the drums themselves get worn out. Washing the Charge Roll gently in soap and water to remove any impacted toner material will extend the roller’s life considerably assuming it is not actually damaged or worn out. Make sure not to get fingerprints on the Charge Roller. Replacing the Charge Roll will certainly be a good option too once aftermarket rollers become available (not yet).
Now to it… Lets see how one of these things comes apart.
That’s it !
Hopefully the instructions will help the cartridge feel familiar from the start.
Author: Britt Horvat, with special thanks to Kurt for his expertise and thanks also for support from whole Partsdrop gang. Originally published as an Article in the marvelous ENX Magazine - www.enxmag.com :)
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