Riso Error A16-525 |top| May 2026

: 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.

: Wipe the small black velvet strip (usually near the clamp) with a dry cloth to remove paper dust. riso error a16-525

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 : There is a small black velvet strip

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

: 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.

Riso rz300ep: error a16-525 - Конференция StartCopy