My Ricoh Aficio CL3500N Laser Printer says set transter belt or used toner bottle.What could cause this,please help

Hi there, You can just empty the waste toner bottle. here is what you need to do. Here is also a manual for your machine http://support.ricoh.com/bb_v1oi/html/oi/re/model/cl3500/cl3500en.htm Detailed instructions on cleaning the Waste toner bottle on Page 32 of the Maintenance Guide. Instead of replacing just empty it. Just be careful as the toner is toxic so you can also vacuum the toner out of the Waste Toner Bottle.
Regards,

You have answered your problem yourself. You say you have emptied it. This means there is used toner residue in the bottle and the sensor is seeing this and still presumes it is full. Thats why manufactuers say "Replace the bottle". Your best bet is to wash out the bottle and let it dry before putting it back in the machine and all should be well.

On a 3224, the used toner bottle is easily replaceable. To get to it, open the front cover of the copier. In the lower left corner, you will see a white or light gray plastic container which slides straight out -- that is the used toner bottle. You can replace it (if you have a new one) by taking the old one out, putting the black plug in the hole to prevent toner from spilling, throwing it away, and inserting the new bottle. If you don't have a new used toner bottle, you can empty this one out into a large bag or trash can and then reinstall it.

You can find the manual here,
http://support.ricoh.com/bb_v1oi/pub_e/oi/0001027/0001027180/VG1398503/G1398503.pdf
you can find the explanation how to find and remove the wast toner bottle on page 32.

The waste toner bottle is on the right side behind the flip-down door. move the green lever and slide it out.

Hello sir; You may open side door, you will find out a retangle plastic box that is the waste toner bottle, on the top of waste toner bottle have a green knob, just slide it to right, you can remved it and dump it out.

Change the waste toner bottle. :-)

here is the link to Ricoh printer maintanace manual
Aficio-CL3500N-Color-Laser-Printer.htm">http://www.generalmanual.com/Printers/Ricoh-Aficio-CL3500N-Color-Laser-Printer.htm
go to page 28 , changing the toner.

Sorry for long delay. Yes you should be able to buy toner to refill your empty carts. i always recommend using original stuff though. Saves any complications and possibility of wrong toner type getting used.

You can download the user manual from the Ricoh web site. The manual tells you how to replace the toner bottle.

Download it from HERE.