Copying using the Duplex function

Sounds like it thinks there is a jam. Check registeration sensor flag also exit sensor and duplex sensor. Could be dust or fuser sensor out of place or the duplex guide is broken

side door ther is one switch is above duplex unit have two spin plastic when duplix close you hear sound

Check if your copier has DUPLEX unit installed, the Duplex unit is a optional component for copiers, seems that you don't have that option installed.

Fuser could be wearing. copying in color creates a thicker layer of toner on the paper which in turn creates more friction within the fuser. Make sure the copier is set to thick paper if in fact you are using thicker than 20 pound paper.

I don't know who advised you before, but...don't start a new link by yelling at people, and.....
2: be thankful for any FREE advice you receive.
3: Ask politely for further advice
4: Learn the basics of your OWN copier.
5: download a user manual from the ricoh website (it's readily available). and look up "duplex"
...here's a hint......guess what that big square box is on the right side??

http://www.brother-usa.com/ModelDocuments/Consumer/Software%20Users%20Manual/SUM_DCP_7030_7040_MFC_7340_7345N_7440N_7840W_EN_1650.PDF

here is the manual p4 and p16 discuss the topic:
Duplex printing 1
The supplied printer driver supports duplex printing.
Guidelines for printing on both sides of the paper 1
�� If the paper is thin, it may wrinkle.
�� If paper is curled, turn over the stack, straighten it and then put it back in the paper tray or the Manual Feed
Slot.
�� If the paper is not feeding properly, it may be curled. Remove the paper, straighten it and turn over the
stack.
�� When you use the manual duplex function, it is possible that there may be paper jams or poor print quality.
If there is a paper jam, see Paper jams in the User’s Guide. If you have a print quality problem, see
Improving the print quality in the User’s Guide.
Manual duplex printing 1
The machine prints all the even-numbered pages on one side of the paper first. Then, the Windows® driver
instructs you (with a pop-up message) to reinsert the paper. Before reinserting the paper, straighten it well,
or you may get a paper jam. Very thin or thick paper is not recommended.
Simultaneous scanning, printing and faxing 1
Your machine can print from your computer while sending or receiving a fax in memory, or while scanning a
document into the computer. Fax sending will not be stopped during PC printing. However, when the machine
is copying or receiving a fax on paper, it pauses the PC printing operation, and then continues printing when
copying or fax receiving has finished.


�� Manual Duplex
Check Manual Duplex. In this mode, the machine prints all the even numbered pages first. Then the
printer driver stops and shows the instructions required to re-install the paper. When you click OK the odd
numbered pages are printed. There are six types of manual duplex binding directions available for each
orientation.
�� Booklet Printing
When you want to print a booklet, use this function. To make the booklet, fold the printed pages down the
middle.
�� Binding Offset
If you check the Binding Offset option, you can also specify the offset for binding in inches or millimeters

check the driver

does not print from bypass tray (manual feed)
does not print on thick paper (check paper type)

Hi There,

The vertical box on the left side of the machine is not closed all the way. Open it, and close it again. It is directly on the left side of the main machine.

Scott K.

When you open the whole duplex unit you will see a very small metal tab with a screw, on the top right side on the machine. This activates the switch on the duplex unit.
Or with the duplex unit open you will se a small rectangle hole inside a switch, put a piece of paper or something to activate it, might got stuck.
This problem is very common on this machines.

check binding -- top or side