Riso Error A16-525 |verified| Jun 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.

Small scraps of master material stuck in the clamp or sensor area. Troubleshooting & Fixes Clean the Absorber Strip: riso error a16-525

: Check the area where the master is pulled off the drum. If the stripper guide is dirty or bent, it won't "hand off" the master to the disposal unit correctly. How to Clear the Code (Maintenance Mode) : There is a small black velvet strip