Canon dr-3080c II vertical lines on image

The Canon DR-3080C is only color on the front side. The back side is monochrome only. The next model, which was the DR-3080CII will do double sided color scanning

What Scanning software are you using? If CapturePerfect, there is an option to detect double page. Once you select this, the scanner will STOP, if two pages are sucked in and the panel will display "d04" indicating double page. Also Wipe all the rollers with a well wrung damp cloth for every 2000 pages to remove paper dirt.
S. Mohan, Chennai, India

Use a blank sheet of paper (as white and clean as possible). Put it in the scanner landscape ( you will need to cut off about 1/2 inch of the paper to make it fit. The run the DR-3080CII Shading tool (DR3KUserSh.exe) C:\Program Files (x86)\Canon Electronics\DR-3080CII\DR3KUserSh.exe

Check the brightness setting. Try keeping at close to the maximum and scan. If it is still black, may be the lighting module or Scan module is affected. Check for any loose connections.
S. Mohan

The thick line is either because of dust sticking to the glass or a module problem. Try different brightness settings and scan white paper. If the thickness varies and also the sides of the black strip are jaggered (step like) then it is dust on Glass. use isopropyl alcohol to clean, dont use solvents. If the teickness is same for all levels of brightness and has a sharp edge always, it could be scan module problem.
S. Mohan

It is dust on the glass, clean it thoroughly. You will find it at the same location for all drawings and may get faded for lower brightness!
S. Mohan

GO ON LINE AND TYPE INTHE FOLLING INFORMATION.

CANON DR 3080C SCANNER SERVICE MANAUL.

ONLINE TO CANON USA.COM

ROD

I need to find a service manual that will help me replace the roller kiton our Canon DR-3080C

You can get them from the following site
http://www.usa.canon.com/opd/controller?act=OPDSoftwareAct&fcategoryid=2341&modelid=512

S. Mohan, Chennai

Try and reinstall the driver software. IF you had scanned only one page and also had chosen multipage option, the second side will not be visible, unless you use a proper software that can display 2nd side.

S. Mohan