DIY video tutorial on how to repair the Samsung CLP-315, CLP-301 laser printer "paper jam" problem, where the paper stops printing about halfway through for no apparent reason. My printer worked great otherwise, but was out of warranty. It would have been less expensive to get a new printer.
The problem is a very cheap sensor.
This repair takes 15 minutes and is inexpensive. Read the comments below.
I got the part from SamsungParts.com. Search for part #0604-001393