Xerox Phaser 7750DN Laser Printer - Answered Questions & Fixed issues

Go into the paper size settings in the menu and re-input the desired paper size.

If you put Tray 2 in Tray 1's spot with the heavy stock in Tray 1 (now in tray 2's spot) and print from it, does the problem persist? This may help... http://www.support.xerox.com/support/phaser-7500/support/enus.html?objGUID=4538

Yes you can "recharge" the developer. It involves removing the cyan developer assembly and replacing the cyan developer powder.

There is an optical sensor above the cartridge where the small clear window is. It may be covered in dust. Use caned air to blow out the area or try a q tip to clean off the sensor.

One of the internal fans is probably not turning or it could be a fuser issue. It might need service.

Hi Felix, Again in broad terms. When you see processing data that could be a sign that the internal processor is trying to make sense of the information you sent to it. I've seen Xerox printers saying processing data and nothing appears before. It could be anything from a bad file sent to the printer, that it can't deal with or print because you don't have a PDF license perhaps. The other helpful thing would be to see if your error sheets have been turned off. I know it is usually a wast of paper but it might be a clue as to why no print appears apter processing your file/print. Consider this, the printer I have is sat quiet with a window saying ready to print and yet the fuser is quite cold. The only thing that can wake it up is a genuine print. Now if it's cold all the time then you should have a 'Fuser Error' Again, sorry to be so vague but without being on site it's difficult to get to the bottom of your query. The local Xerox engineer or concessionaire should be really helpful. Good luck.

Hi anonymous, I suspect you have solved this problem by now. Regards.

Pull the paper tray completely out. using a flashlight, look into that section. There should be a black flag hanging down. That is the paper out sensor flag. If it's not hanging down, look at the roof of that section and see if you can find it hung up. If it's there, carefully pull it downward gently. If it's missing, time to call in the technician because the main board is going to have to be opened up to replace that missing part.

The Black ATC sensor detects an insufficient amount of developer. Remove fuser and visualy check black developer housing. Does developer even on magnetic roll? If this failure reoccurs three times successively, you will need to clear Tech Rep Fault in service mode.

Did you ever figure this out? I'm having the exact same problem right now & can't afford to call in a service guy. If you know, please send a message to [email protected]. Thanks!

Not yet, check with the supplier and ask if it is compatible with the 7750, if not then exchange the 7760 for a 7750 yellow toner cartridge. Once you open the cartridge the supplier will not exchange.

You bought a new HDD?

This problem occurs when you buy the wrong image unit.
The contact chip that is located at the bottom of the orange plastic is not for the machine. Replace it with 7750 image unit and that should fix your problem. Black is fault 9-910 cyan fault : 9-911 magenta fault: 9-912 yellor 9-913.

Open and close the paper drawers!!! Super stupid solution, but trust me... it works!

yes, the imaging units that come with the 7700 series are all similar. however if one is failing swapping them will not make the problem go away, it might actually make it worse. taking out the imaging units can reduce their life span. the photo imaging strata on the rollers are very light sensitive and should not be exposed to light for more than 5 minutes. best practice is to turn a black garbage bag inside out and while removing old ( or new) unit make sure the unit goes into bag with little to no light exposure!

I have the complete 9 page instructions with images if you want I can e-mail them to you. Here is a snippet explaining just the portion of the beads. (email me at [email protected] for complete instructions). Also, if you purchase the developer beads from iteminc.com they will include the instructions " 1. Place the developer housing assembly (new or used) to be recharged on a drop cloth. Caution During this procedure, the developer housing assembly must be kept level at all times. To prevent toner spillage, it is recommended that the developer housing assembly be fully supported level by laying it on something like a large piece of cloth, paper towels or styrofoam hollowed out for the developer housing assembly to lie on. If new, remove the protective cover over the magnetic roller. Do not touch the magnetic roller. Note The wires are routed under and behind the right snap tab. 2. Release the snap tabs at each end of the developer housing assembly and remove the assembly cover. 3. Agitate the package of developer mix and then cut it open. Carefully pour the entire contents of developer mix as evenly as possible over the two augers. Do not let the developer mix accumulate heavily on the roller. Keep the developer housing assembly level. 4. Reinstall the cover making sure that the rear tabs are all engaged in their respective slots while positioning the wire harness under the snap tab. Press firmly until you hear a positive "snap" sound for each tab indicating each snap tab is securely fastened. 5. Tear off the ATC sensor perforated tag. Do NOT remove the ATC sensor label from the developer housing.Peel off the protective backing, and adhere the label to the appropriate or corresponding Imaging Unit Plate. Make sure the ATC sensor tag label can be located if needed later. 6. Record the number for entering into NVRAM in the next step. 7. Perform the ATC Sensor Setup procedure."

Have you a problem with the Xerox or HP ??

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Try swapping out the yellow imaging unit with another color, such as cyan. Print out several test pages, if it continues to dump yellow toner then it is probably a bad developer. If it changes to cyan then it is a bad image unit. If you need another image unit the part# is 108R00581, you can buy a rebuilt one here to save you money. If you suspect it is a bad developer you may want to take your printer to get repaired because it is not an easy fix. Hope this helps, and thanks for using FixYa!

There is a chip in the bottom of the image unit which stores the image unit life. These can be reset but it requires special hardware and software to do it. You can also buy replacement chips, they're usually about $50 for a 4 pack and you can find them on e-bay. Rechipping with out replacing the entire image unit will result in lower quality prints though.