I have a samsung fax scx 4623f it keeps on indicating printing

The fuser is not warming up. You will need a new one. Not easy to fit so best have an engineer do it.

This is common. Check the right side of the front door. It will not be flush with the main case. Just give it a wack. it will work then.

Dear
The front door right side there is a lever found when it is opened the lever should close the micro switch inside and the door is locked with another short lock (near the long lever). If door lock broken then the micro switch push the lever and door not closed.

the basic problem with the micro switch and related mechanical alignment.
Thanks.

The scanner part of the printer is messed up. HP says "LSU error: #04-001. Please turn off then on." LSU = Laser Scanning Unit.

the sencor is dirt you need to clean it.

While Samsung SCX-4623f printer always "paper jam in exit area" you get paper checks or trigger sensor paper cup

cong ty bao ve support
good luck

reset the manual feeder or tray 2.and chk the paper sprator

check power and logic

you should install the fax utility from SAMSUNG
http://www.samsung.com/us/support/downloads/SCX-4623F/XAA
got to the Software tab page and download the file :
PCFax_V1.05.13.exe

after restarting the pc it should work.

Please download the PC NETWORK FAX UTILITY and try.