Riso Error A16-525 Jun 2026
: If using an aftermarket screen, use a black permanent marker (Sharpie) to darken the entire black strip and the area around it to ensure no light reflects back to the sensor.
This is a black velvet or non-reflective strip on the drum. If it is dirty, worn, or "too fuzzy," the sensor may reflect light back and incorrectly report that a master is still present.
Usually involves holding down specific keys while turning on the machine.
Clean the master clamp plate on the drum itself to ensure it is releasing the stencil cleanly. riso error a16-525
: If you purchase third-party screens, ensure they include an adequate, non-reflective light absorber strip.
For a visual walkthrough of clearing this specific error on models like the Riso CV 3230, you can follow this guide: Riso 3230 A16 525 error resolve Creator Ratikanta YouTube• Mar 30, 2023
can be used to adjust the drum's rest angle by ±8.0° to ensure the sensor aligns perfectly with the black strip. for your particular Riso model? : If using an aftermarket screen, use a
The is a common technical issue encountered by users of Risograph digital duplicators, specifically within the Riso RZ Series , EZ Series , and RV Series.
If you recently replaced your screen and are getting a false error, the black velvet strip might be too reflective. You can try darkening it with a black Sharpie or applying a small piece of black matte gaffer's tape or washi tape to help the sensor absorb light correctly.
: The drum rotates to Position-A, and the master clamp plate opens. Usually involves holding down specific keys while turning
If the error persists even when there is no master on the drum, try these common community fixes: Darken the "Light Absorber Strip"
It is highly common for operators to encounter a persistent even when the drum is completely blank. This means the machine's reflection or detection mechanism has been compromised.
Reinsert the box firmly until it clicks, and close the door. Step 2: Manually Remove the Jammed Master
: A paper jam or using the wrong paper size can also trigger this error. Riso duplicators are designed to work with specific paper sizes and types. If the paper does not match the specifications or gets jammed in the machine, it can disrupt the printing process and cause the error.