Riso Error A16-525 May 2026
If you are seeing Error A16-525 on your Risograph, the machine is essentially stuck "waiting for the master to be removed" from the print cylinder. This usually happens when the sensor detects a master still on the drum, even if you’ve already peeled it off. Why it happens
- You will need isopropyl alcohol and a lint-free cloth or cotton swab.
- Clean the Cartridge Chip: Gently wipe the metal contact area on the ink cartridge.
- Clean the Printer Contacts: Look inside the slot where the ink sits. You will see small metal spring-loaded pins. Clean these gently with a cotton swab dipped in alcohol. Ensure they are not stuck down with ink sludge.
- Clean the Ink Cylinder Sensor: Depending on your model, there is often an optical sensor near the mouth of the drum. Wipe away any excess ink splatter in that area.
What the machine thinks: “I sent the paper. I waited for the sensor to trigger. The sensor did not trigger within the allowed window. Either the paper didn’t arrive, the sensor is lying, or the roller is slipping.” riso error a16-525
Reflective Issues: Aftermarket or generic replacement screens may have a "light absorber strip" (the black velvet strip near the clamp) that is too thin or reflective, causing the sensor's light to bounce back improperly. Troubleshooting Steps If you are seeing Error A16-525 on your
Error A16-525 on a RISO printer typically points to a communication issue between the master-making section and the drum unit, often related to the thermal head or its connection. You will need isopropyl alcohol and a lint-free
Are you using a generic replacement screen on this drum, or did the error start after a specific incident like a master jam?
However, if you are looking to write a review for a technician or service guide that helped you fix it, or if you want to write a creative "review" of the error code itself, here are three options:
: If the drum's "Position-A" is slightly off, the sensor may be looking at the shiny metal of the drum instead of the black absorber strip. 3. Troubleshooting Steps
