Kyocera 250ci making Grinding noise when printing colour, but not for Black&White. for both print and copy same problem.
First you have to check the counters to see how many pages were printed or copyed. It may be a problem with some of the color drum units. At this model you need to change the units near to 100.000 A4 prints with 5% coverage. If the coverage is greater, then you'll need to change them sooner. There might be another cause for the sound, like the Transfer Belt Unit. This unit has a "waste toner path" that might be jamed. The unit is not able to get rid of this waste toner and some gears produce that noise. The transfer belt unit is working separatly for black prints and color print. You will have to remove the Transfer Belt Unit and clean the toner path with a vaccum cleaner.
SOURCE: Oki C5150N Grinding noise
One of the drum cartridges is stuck. Test by removing them one at a time with the printer off, then turning on.
SOURCE: grinding noise on startup
Problem
The Resume light continues to blink after the paper jam is cleared.
OR
The carriage is stuck or making a grinding noise.
Solution
1. Lift the top cover to the printer.
2. Turn the printer off and then on again.
3. Unplug the power cable from the back of the printer when the grinding noise starts.
4. Move the carriage towards the middle of the printer (this procedure may take a couple of tries to get the timing correct).
5. Take out the cartridges and close the top cover. Turn the printer back on!
6. Reconnect the power cord.
7. Open the top cover, reinstall the cartridges, and then close the top cover
SOURCE: HP 1720 I making a noise when printing.
Troubleshooting
NOTE: Refer to the Testing section in this document for instructions on performing the tests.
Figure 1: Location of the white strip
Replace the whole unitIf the printer is still making a grinding or squeaking noise after following the steps above, replace the whole unit. See Whole Unit Replacement instructions, which are included with the whole unit replacement.
TestingUpon replacement of the whole unit, perform a Paper Path test and a self-test as described below to verify that the new unit is functional.
Performing a paper path test
NOTE: The paper path test will terminate only when the paper in the tray being tested runs out or the printer is turned off.
Performing the stand-alone self-test
Hope this help. Please
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SOURCE: Canon PIXMA 530 grinds away
I had a persistant grinding noise about 30 seconds after the printer finished printing. It's been going on about 2 months. I did one thing which seemed to work. So try opening the cover on the back of the machine by lifting upward on the gray lever in the middle of the back of the machine. Leave this cover open during and after printing. The grinding noise went away.
SOURCE: Xerox 6360dn, Tray 2 makes loud grinding noise
In my experience, it was the registration roller causing the grinding noise. See http://my.brainshark.com/Phaser-6300-6350-6360-Grinding-Noise-795590408 for troubleshooting video.
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