: Pull out the print drum, manually peel off any remaining master material, and slide the drum back in.
: The machine uses an optical sensor to detect masters. If the sensor is dirty or blocked, it may falsely report a master is present.
If the master roll was installed improperly or sustained physical damage, it may tear or crumple abnormally during the disposal phase.
Use a soft cloth to wipe paper dust or ink off the small black velvet strip near the drum clamp. Restores the strip's light-absorbing properties. 3. The "Sharpie Trick" riso error a16-525
(typically in the range of -80 to +80) to ensure the sensor aligns perfectly with the absorber strip. Replace Parts: If the strip is severely damaged, you may need a new Light Absorber Strip (Part #023-17004). Are you using an aftermarket screen original RISO drum , and did this error start after a specific master jam?
You need to verify the sensor is working electronically.
For a visual walkthrough of clearing this specific error on machines like the CV 3230, watch this troubleshooting guide: Riso 3230 A16 525 error resolve Creator Ratikanta YouTube• Mar 30, 2023 Advanced Troubleshooting : Pull out the print drum, manually peel
Inspect the strip to ensure it is flat, uniform, and fully intact. If it is peeling or damaged, it must be replaced. While sourcing a replacement strip, temporary black matte gaffer tape or high-quality electrical tape can occasionally serve as a temporary stopgap, though a proper factory strip is required for reliable sensor reflection. Clean the Machine's Optical Sensors
Use this if you found a PDF or website that helped you solve it.
: Use a dry cotton swab or a microfiber cloth to gently clean the glass lens of the optical sensor. Avoid heavy solvents on the sensor itself to prevent clouding the plastic optics. How to Reset the Riso After a False Error If the master roll was installed improperly or
Over time, the rubber rollers responsible for pulling the master into the disposal area can become slick, dirty, or worn down, losing their grip. Step-by-Step Troubleshooting Process
: Check the machine's maintenance requirements. Ensure that all necessary maintenance has been performed and that consumables (like ink or master units) are properly installed and not depleted.
Troubleshooting the A16-525 "Master Removal" Error Body: If you're getting A16-525 on your RZ/EZ series, it's often a sensor issue rather than a physical jam. Based on common fixes from PrintCopy.info and the Riso community:
