Copies come out overtoned - Samsung 6345 Copier SCX6345 Printer

i would suggest changing out the developer...if it becomes overtoned it will get a dark background

clean or change the main charge corona

SC390 = Toner Density Sensor abormality

Possible causes:

• Poor concentration of developer
• Toner density sensor faulty

Are the prints/copies coming out ok? If the copies are very faint or heavily overtoned then changing the developer may cure the error code. If the copies look OK then you probably need to get the toner density sensor replaced by an engineer.

Hope this helps.

The light copies and overtoning is probably caused by the developer going bad. Do you have a service contract on your copier? It's likely time for a whole PM (preventive maintenance) procedure.

The sc990 is probably caused by the copier's condition as well. Once you have the PM done (or at least replace the developer, rebuild the photoconductor unit, and clean or rebuild the transfer unit) the sc990 codes should go away along with the poor copy quality.

3 possible causes:
1) The optics are dirty thus making your copy darker. The test for this is to manually lighten the copy using the exposure control on the panel of your copier. Lighten the copy several positions and see if the copy gets better. If it does then the optics need to be cleaned.
2) The copier is overtoned. This means that the toner to developer concentration is to high. This will require a trained technician to lower the toner ratio and then recalibrate the toner/developer ration using the F8 mode.
3) If the shading gets much worse as you run say 10 copies in a row then the drum cleaning blade would be the cause. So run 10 copies of something and compare the first copy out with the tenth copy out. Do you see a dramatic difference in the amount of background or "shading"?
Good Luck and thank you for using Fixya.

Try these people. Used them before and there pretty good.
Overton Dismantlers
Overton Garage Ltd
off Dyce Drive
Aberdeen
Scotland AB21 0EQ
Tel: 00.44.1224.722354
Parts Fax: 00.44.1224.775451
General Fax:00.44.1224.722457
Email : [email protected]

Hope they can help.
Rich....

This error is for the copy density sensor. Remove drum unit, 1 screw, and you will see the sensor inside of the machine. Either dropping toner out of the drum unit or machine is overtoned. I would recommend a service call from a technician for this problem.

use genuine toner it may be

Your film may have gotten hot or has passed the expiration date. If the tint is splotchy, there could be a light leak, either in the camera or the film cassette after you take it out of the camera. If all your photos were taken indoors under incandescent light, they will also be tinted reddish.

The fuser probably will not help. I think you probably will need a PCU, and a service call.