My Ricoh Aficio SP C811DN-DL Printer smudges bottom of the page each time I print. It's a 3cm wide stripe of colourful smudges running across the bottom of page.

The transfer belt is not calibrated or the ID sensors are dirty. Read the user manual on how to calibrate it. No manual? Go to ricoh-usa.com

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to some popular brand printers are given with illustrations.

please check the laser glass and clean very well since this can also cuse that

Perhaps, it is a faulty PCU. Try by shutting off power and using another but wait a few minutes before turning it on again.

SC367 is a toner density error having to do with yellow. If you've tried turning the machine off (with the power switch on the lower left side) and turning it back on and that doesn't help, your next move should be to replace the yellow photoconductor unit (PCU).

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Ricoh Aficio error SC542

One possible cause could be the transfer belt cleaning section. It can get a toner build up on the blade. Take it out and wipe the blade off. The transfer unit is above the drums and the cleaner is on the left side.

fuser problem . danger . call tech

Enter the menu of the printer pressing once the relevant button and with the up or down buttons find the list test print. Then press once # or OK (whatever the machine has) and you see Configuration page. By pressing once again the # or OK it prints the Config.Page, which somewhere on the top of thw sheet shows the pages printed (first the black and then the colour. Good luck!

Check the paper size settings and orientation of the driver from the Control Panel, and that match to the paper size in the printer's trays.

Good luck and please rate me, thanks.