Black marks on side of paper

replace the drum unit, if the problem persists check the Leser unit (unit scan), open it and clean the mirrors and lenses gently with alcohol and toilet paper

Hi

By spacing, I assume you mean the margins at the centre.

The default margin settings are not the same for the right and left hand side of the page, so the printing on the reverse side is offset from the printing on the first side.

The right margin is always wider to allow for punch holes in file paper.

It is not the printer settings you need to adjust, it is the page layout of your word processing software.

Adjust the margin settings manually. In MS Office 2007:

Page Layout > Margins > Mirrored Margins.

Hope this helps.

Run a half test.
Put paper in the manual feed tray.
Print something, anything
When the paper is 1/2 way into the printer, open the cover.
Pull out the toner cartridge. Look down at the paper.
Does it have a black line on the right side?
If yes, replace the cartridge. If no, replace the fuser.

To clear the message Paper Jam from the display, follow the steps listed below:

NOTE: images shown below are from a representative product and may differ from your Brother machine.


STEP A. Check for and remove any jammed paper or foreign objects in the machine

1. Unplug the Brother machine from the power outlet.
   
   
   Caution Before you unplug the machine from the power source, you can transfer your faxes that are stored in the memory to your PC or another fax machine so you will not lose any important messages. Refer to the Related FAQs in the end of the page for information. (only for applicable models)
   
   
2. Lift the scanner cover using the plastic tabs or finger holds, located on the left and right side of the machine until it locks securely into the open position.
   
   
   
   
   Caution DO NOT touch the encoder strip. The encoder strip is a clear plastic strip in front of the white vinyl band (outlined in red as shown in the picture below). If the encoder gets markings or debris on its surface, it may cause other problems.
   
   
   
   
   
   
   
   
   
3. Verify the location of the print head. The print head is a black square object, located behind the encoder strip. The print head moves from left to right.
   
   
   
   • If the print head is on the right side underneath the cover like the picture below, go to the steps "If the print head is on the right side:".
     
     
     
     
     
   • If the print head is located on the left side, continue to STEP 4.
     
     
   • If the print head is in the middle, go to STEP 5 below.
   
   
   
4. Move the print head to the middle using your fingers.
   
   
   Caution DO NOT touch the encoder strip (marked in red shown below).
   
   
   
5. Check for and remove any ripped paper or a foreign object in the left corners or underneath the print head.
   
   
   Hint The ripped paper may be very small. Using a flashlight will help you to find the ripped paper.
   
   
6. Turn the machine around and open the Jam Clear Cover (1). Look inside the machine and remove any jammed paper.
   
   
   
   
7. Close the Jam Clear Cover. Make sure the cover is closed properly.
   
   
   
   
   
8. After removing all of the paper scraps, Close the scanner cover by lifting the scanner cover to release the lock. Gently push the green scanner cover support down and then close the cover.
   
   
9. Remove the paper tray (1) from the machine.
   
   
   
10. Place one of your hands under the LCD unit and into the opening of where the paper tray was.
    
    
11. Using your hand, lift the front of the machine approximately 6 inches off the surface.
    
    
    
    
12. Look inside the tray areas roof of the machine and a row of black rollers will be aligned across. See picture below.
    
    
    
    
13. Look in-between each of the black exit rollers for a piece of stuck scrap paper. (A flash light may need to be used if you are having trouble locating the paper scrap).
    
    
    
    
14. Using a pair of tweezers, the paper scrap can be easily removed from the exit rollers.
    
    
15. Place the machine gently down onto the surface.
    
    
    • If no paper scraps were found inside the machine, please check the paper in the tray. If the paper is slightly curled, the print head will catch the edge of the paper and tear it. To resolve the issue, the paper in the tray must be replaced and continue to STEP 16.
      
      
    • If paper scraps were found and removed from the machine, continue to STEP 16.
    
    
    
16. Put the paper tray back into the machine.
    
    
    
    
17. Plug the power cord back into the power outlet.
    
    
    • If the LCD displays the date and time, go to STEP D.
      
      
    • If LCD displays the message "Paper Jam" go to STEP B.

- If the print head is on the right side:

1. Plug the power cord back into the power outlet and wait for the machine to stop making noises.
   
   
   
2. Press the Stop/Exit key for approximately 5 seconds until the print head moves to the middle.
   
   
   
3. Unplug the machine from the power outlet.
   
   
   Caution Make sure to unplug the machine. The print head may move and injure your hand. Before you unplug the machine, you can transfer your faxes that are stored in the memory to your PC or another fax machine so you will not lose any important messages. Refer to the Related FAQs in the end of the page for information. (only for applicable models)
   
   
4. Examine the right side of the machine where the print head had been positioned and underneath the print head and remove any pieces of ripped paper or foreign objects.
   
   
   Tweezers may be used with caution to remove paper scraps or the foreign objects.
   
   
   Hint The ripped paper may be very small. Using a flashlight will help you to find the ripped paper.
   
   
5. After confirm the paper scraps or the foreign objects in the right corners or underneath the print head, go to STEP 6.

Normally this is caused by the drum cartridge that fits under the toner. Replacing this drum cartridge will clear up the black marks on your print. Use this Dell Part# : A0373010 to order. After replacing the drum cartridge counter will have to be reset, Use the following steps.
1. Open the front door.
2. Press and hold the cancel button (x button) until all the lights flash in order.
3. Then close the front cover.
This will reset the drum counter.

Your machine has the wrong paper in it or the paper sensor is not working properly.  There should be a black mark on the top left hand corner of each page.  The correct ekg paper and ekg repair is available from Medical Device Depot.

You will need to replace the yellow drum or get a replacement if over 40% used hope this helps.

Replace the toner cartridge; this happens periodically, especially with refurbished cartridges. Parts of the cartridge can go bad even though the cartridge itself still has ink in it.

Sounds like you have a bad fuser assembly if the drum unit didn't solve the probelm.

The toner cartridge roller may be defective or there are outside light going inside the printer, causing the bands.