I want a manual for changing fuser om laserjet 3015 aio

Error 50.xx indicates Fuser faulty, replace it..

Put paper in the manual feed tray(tray 1). Print something. When the paper gets about 1/2 way into the printer, open the top cover. Pull out the toner. Look down at the paper in the printer. Do you see a thick dark line? Replace the toner. No thick dark line, check the fuser for damage.

Yip, its fuser film alright. You could pick up a fuser unit / kit from:

http://www.printersupplies.com/c-Laserjet3015Parts.html

and fix it yourself using the manual in this post:

http://www.fixya.com/support/t468332-fuser_removal_instructions_hp_laserjet

Best of luck
BD

Have you tried the HP LaserJet 3015/3020/3030/3380 Fix Scan Utility v3.1

Information about the Fix Scan Utility 3.1
http://www.opendrivers.com/driver/233507/hp-laserjet-3015-3020-3030-3380-fix-scan-utility-v3.1-windows-98se-me-2000-xp-server-2003-free-download.html

Download from HP
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=US&swItem=ma-38336-1


Download the latest Driver and Software
http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?prodNameId=378050&lang=en&cc=us&prodTypeId=18972&prodSeriesId=378048&taskId=135


HP Business Support Center
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?locale=en_US&prodTypeId=18972&prodSeriesId=378048


User Guide
http://www.lavc.edu/IT/Manuals/Printer_HP_Laserjet_3015_User_Guide.pdf

I hope this helps!
Steve

Printed pages are VERY light, and the fuser temperature is low. The toner is not fixed on paper. Still it don`t give any errors. A detailed diagram of the power souce have anyone?

The paper is probably jammed between the fuser and the rear cover if you can't see it.

A fuser image should only be about 1 1/2 inches away, 3 inches sounds like a drum problem.

Its a HP LASERJET 3020 SCANNER/PRINTER/COPIER,,,

ITS SAYS SCANNER ERROR POWER ON POWER OFF

Here is a link to the Service Manual for this machine. This should give you the info you need.
Larry

http://www.savefile.com/files/1919671

is it wavy? if so then it is either the toner cartridge or the fuser unit (heat section) I would go for the fuser unit as the hot roller that makes the toner stick to the paper is only a plastic film. Have you noticed any gray pieces of plastic coming out?

Hope this help you and you can get these machines repaired also please rate me
Cheers J