I have a samsung printer scx 4521. i did a format

Probaly you have to change the cartrige.

If you go to the following website:

http://www.samsung.com/ca/support/detail/supportPrdDetail.do?menu=SP01&prd_ia_cd=&prd_mdl_cd=&prd_mdl_name=SCX-4521F

You will be able to download your drivers from that website.

Thank you for the opportunity to assist you in resolving your issue. Should you need further information or assistance please do not hesitate to let us know.

Hello,
press Menu, then press 8, using arrows go to "System data", press Enter
Good luck!

You can download the drivers from the Samsung Official Support site. Here is the link for Samsung SCX-4521F. Click Downloads - Drivers, select Operating System (Windows 7) and get the drivers

Let me know if any further clarification/ assistance is required.

Good Luck!
Appreciate generously, if the solution could have been of any help!
CreativeTECH

http://safemanuals.com/user-guide-instructions-owner-manual/SAMSUNG/SCX-4521-_E

pls. vote for better service

please change your copier toner unite it demage

Maybe you should read the user's manual first.
Download it from here.
http://www.samsung.com/pt/support/download/supportDown.do?group=printermultifunction&type=printermultifunction&subtype=monomultifunction&model_nm=SCX-4521F&mType=&dType=D&vType=R&prd_ia_cd=06010900&disp_nm=SCX-4521F
Check chapter 7.

ithink it is a hard were pr oblem we should clean our printer time by time, there is many dust inside, they can make disattacment between sencer and parts ,so we get this information. open printer and also if u open drom and other part open , then blow air by air blower machin e.we solve more than 80% thise type case in our lab .

if it's a vertical line in scanned pictures, it's probably a dust bunny on the scanner head, if it's only on printed pages, it's probably a dust bunny on or in the laser assembly or between the laser and the photosensitive drum. if cleaning doesn't get rid of it, you could have a defective scanner head or laser assembly, or a scratch on the photosensitive drum.