Kyocera FS 3920 printing error

Kyocera FS 3920 printing error


I have just bought a Kyocera FS 3920 refurbished printer. I did a lot of research based on my budget and the tasks I want the printer to accomplish. We ran tests with the seller and I was happy to pick the machine home. However, on reaching home, the Kyocera printer is printing its own things nonstop. I have tried cancelling the printing but it wont stop. This is what it is printing:

Error name: /undefined

Offending command: YZJZ (This changes depending on page and it is incomprehensible)

Operand Stack:

I have no idea what to do as I have already done everything and can’t find an answer online.


There are several possibilities and solutions for Kyocera printer printing its own things. Do not panick.

  1. Check the USB cable to make sure it is in the correct port. The communication between the computer and the printer should not be compromised, otherwise it will affect the outcome. The printer can start printing symbols or incomprehensible errors if the USB cable is loose or in the wrong port. Use the 2.0 port for a start as you test all the ports.
  2. It sounds awkward but this solution has worked for most people. Once you make sure the USB cables are not loose, switch off your printer. Remove the power cable from the sockets. Return them and switch on the machines again. Simple but magical.

Author: Moshek Africa

Moshek Africa is a digital media research and development web service. The website offers informative content for a large audience interested in varied information. With a lot of interest in Kenya and the East African region tech, business, travel spaces, and Africa at large. It also covers universal content of interest to the world.