Riso: Error A16-525 'link'

Inspect the sensors for any visible damage or blockages. Cleaning the sensors may resolve the issue if they are dirty.

: Paper dust or ink on the black velvet strip can make it reflective, tricking the sensor into "seeing" a master. Aftermarket Screen Issues riso error a16-525

If the velvet is dusty, worn, or scrunched up, the sensor sees a reflection from the metal/mesh underneath and thinks a master is present. Inspect the sensors for any visible damage or blockages

Are you using a on this drum, or did the error start after a specific incident like a master jam? or scrunched up