I've tried turing the power off, opening and shutting doors, nothing works. It was a donated machine to our agency, and all it does is flash that error message.
Is it fixable? Or should we push it out the window?
Ok thsi is fixable E7 is an Automatic Document feeder or finisher problem.
There should be another 2 other numbers flashing after the E7 to tell you where in these options the fault is.
Hope this helps
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Turn the machine off. Open the access door and remove the cyan photoconductor unit. Check the contact pins are straight and undamaged. Gently reinsert the unit. Turn the power back on. If the machine still does not recognise the pcu is inserted it is probably damaged and needs replacing. How many copies/prints has your machine done?
The fuser door is at the back of the machine. Open the door, pull down and close firmly shut. If the error persists it could be that the sensor has gone bad. The sensor is actually hard wired to the High Voltage Power Supply that sits right above the paper tray underneath the machine. It would need to be replaced if closing door doesn't fix the error, the part number is 105N02120,a link to picture of the part is 105N02120 Xerox 3300MFP HVPS Item Inc
Try checking the paper path, there might be a broken or loose gear in there, a bent wire or stuck debris. If you done this and all seems ok but the error message keeps flashing, try to do a hard reset. That usually clears off error messages. If nothing happens, you might need to call a technician.
Error 77 basically means- Heater thermistor short circuit. However, the message is sometimes incorrectly shown. You can try this- power off the machine, take out the cartridge, close the door and power up. The machine should notice either the toner or the front door is not in place. Now open the door and place the toner. This might solve the problem. You can also try to soft reset the printer. If none of these works, you might have to change the thermistor.
Try this reset.
Power the machine off, Hold "0" the zero key while powering the machine on. That will put it in diagnostics mode.
Then enter 20, press start, then enter 3 and start. Power off and back on and let me know.
Check all other carts. It might be that one (or more) carts are empty, too. Thats why the machine refuses to work properly.
Unplug from power, wait two minutes and replug again.
If it doesnt come up correctly the maincircuit baord might be defective due to a defective electrical part.
Do leave the machine always on power connection. You can turn it off by pressing the stand-by-fax button, but you have to keep the machine with power supplied. Set date and time. The machine runs some automatic cleaning cyles every 20 days to keep the nozzles alive and that prevents the permanent ph from drying out!
With the power off & the machine unplugged, remove the scan glass & move the scanner a few inches from "home" position. Plug in & turn on machine. Does the scanner return to home position? If not, you either have a bad scanner motor or scanner cable. I'll look for you to post the results of the scanner drive test.