Riso Error A16-525 May 2026

Riso rz300ep: error a16-525 - Конференция StartCopy

If the error persists on a clean drum, it is likely an optical detection issue.

The is a common "service call" code on Risograph digital duplicators, typically indicating that the machine is awaiting master removal from the print cylinder . While it primarily signals that a used master is still attached to the drum when the machine expects it to be gone, it often appears as a "false" error even when no master is present. Common Causes of Error A16-525 riso error a16-525

: The machine uses an optical sensor to detect masters. If the sensor is dirty or blocked, it may falsely report a master is present.

: There is a small black velvet strip on the drum meant to absorb sensor light. If this strip is worn, dusty, or missing, the sensor detects reflection from the metal drum instead. Common Causes of Error A16-525 : The machine

: 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.

: Some users find success by placing a small piece of matte black gaffer tape over the strip to improve light absorption. 3. Reset and Service Mode If this strip is worn, dusty, or missing,

: Non-original "generic" silkscreens often use white plastic mesh. The sensor's light reflects off this mesh, tricking the machine into thinking a master is still attached.

: A used master master is actually stuck on the drum or failed to eject into the disposal box.